@

fix(docker): eliminate TOCTOU race and format web components Use fs.promises.open() to get a file handle, then fstat/readFile/ createReadStream from the same fd — eliminates the CodeQL "file system race condition" alert between stat() and read. Also runs prettier on the 5 web component files that were failing the format CI check. @
fix(docker): harden log sanitization, fix error leak, fix killAndWait race
2026-05-25 08:16:27 +01:00 · 2026-05-25 07:41:33 +01:00 · 2026-05-25 06:54:57 +01:00 · 2026-05-25 06:48:23 +01:00 · 2026-05-24 20:37:17 +01:00 · 2026-05-24 19:53:07 +01:00
924 changed files with 91748 additions and 10224 deletions
@@ -17,11 +17,11 @@ npx gitnexus analyze

 Run from the project root. This parses all source files, builds the knowledge graph, writes it to `.gitnexus/`, and generates CLAUDE.md / AGENTS.md context files.

-| Flag                | Effect                                                                                                  |
-| ------------------- | ------------------------------------------------------------------------------------------------------- |
-| `--force`           | Force full re-index even if up to date                                                                  |
-| `--embeddings`      | Enable embedding generation for semantic search (off by default)                                        |
-| `--drop-embeddings` | Drop existing embeddings on rebuild. By default, an `analyze` without `--embeddings` preserves them.    |
+| Flag           | Effect                                                           |
+| -------------- | ---------------------------------------------------------------- |
+| `--force`      | Force full re-index even if up to date                           |
+| `--embeddings` | Enable embedding generation for semantic search (off by default) |
+| `--drop-embeddings` | Drop existing embeddings on rebuild. By default, an `analyze` without `--embeddings` preserves them. |

 **When to run:** First time in a project, after major code changes, or when `gitnexus://repo/{name}/context` reports the index is stale. In Claude Code, a PostToolUse hook detects staleness after `git commit` and `git merge` and notifies the agent to run `analyze` — the hook does not run analyze itself, to avoid blocking the agent for up to 120s and risking KuzuDB corruption on timeout.

@@ -1,5 +1,5 @@
 name: Setup GitNexus Web
-description: Setup Node.js 20.19+ (vite 7 floor), build gitnexus-shared, install web dependencies
+description: Setup Node.js 22, build gitnexus-shared, install web dependencies

 runs:
  using: composite
@@ -7,9 +7,7 @@ runs:
    - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
      with:
        # Vite 7 requires Node ^20.19.0 || >=22.12.0 (require(esm) support).
-        # Pin explicitly so we don't depend on the floating "20" alias resolving
-        # to a high enough patch version on every runner image.
-        node-version: '20.19.0'
+        node-version: 22
        cache: npm
        cache-dependency-path: gitnexus-web/package-lock.json

@@ -1,5 +1,5 @@
 name: Setup GitNexus
-description: Setup Node.js 20, install dependencies, and optionally build
+description: Setup Node.js 22, install dependencies, and optionally build

 inputs:
  build:
@@ -12,7 +12,7 @@ runs:
  steps:
    - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
      with:
-        node-version: 20
+        node-version: 22
        cache: npm
        cache-dependency-path: gitnexus/package-lock.json

@@ -7,6 +7,8 @@ updates:
    directory: /
    schedule:
      interval: weekly
+    cooldown:
+      default-days: 7
    open-pull-requests-limit: 5
    commit-message:
      prefix: chore
@@ -15,6 +17,36 @@ updates:
      - dependencies
      - ci

+  # Keep pinned Docker base-image digests current for the root Dockerfiles.
+  - package-ecosystem: docker
+    directory: /
+    schedule:
+      interval: weekly
+    cooldown:
+      default-days: 7
+    open-pull-requests-limit: 5
+    commit-message:
+      prefix: chore(deps)
+      include: scope
+    labels:
+      - dependencies
+      - ci
+
+  # Keep the nested test-image Docker base digest current as well.
+  - package-ecosystem: docker
+    directory: /gitnexus
+    schedule:
+      interval: weekly
+    cooldown:
+      default-days: 7
+    open-pull-requests-limit: 5
+    commit-message:
+      prefix: chore(deps)
+      include: scope
+    labels:
+      - dependencies
+      - ci
+
  # Gitnexus npm deps — tree-sitter grammars checked daily so we catch
  # new releases that unblock the tree-sitter 0.25 upgrade ASAP. Grammars
  # are grouped so lockstep bumps produce a single PR. The tree-sitter
@@ -25,6 +57,11 @@ updates:
    directory: /gitnexus
    schedule:
      interval: daily
+    cooldown:
+      default-days: 7
+      semver-major-days: 30
+      semver-minor-days: 7
+      semver-patch-days: 3
    open-pull-requests-limit: 10
    commit-message:
      prefix: chore(deps)
@@ -54,6 +91,11 @@ updates:
    directory: /gitnexus-web
    schedule:
      interval: weekly
+    cooldown:
+      default-days: 7
+      semver-major-days: 30
+      semver-minor-days: 7
+      semver-patch-days: 3
    open-pull-requests-limit: 5
    commit-message:
      prefix: chore(deps)
@@ -67,6 +109,11 @@ updates:
    directory: /gitnexus-shared
    schedule:
      interval: weekly
+    cooldown:
+      default-days: 7
+      semver-major-days: 30
+      semver-minor-days: 7
+      semver-patch-days: 3
    open-pull-requests-limit: 5
    commit-message:
      prefix: chore(deps)
@@ -32,6 +32,7 @@ import pathlib
 import re
 import sys
 import urllib.error
+import urllib.parse
 import urllib.request

 REPO_ROOT = pathlib.Path(__file__).resolve().parents[2]
@@ -190,7 +191,17 @@ def fetch_text(url: str, timeout: int = 8) -> str | None:
    set (raises the rate limit from 60 to 5 000 requests/hour).
    """
    headers: dict[str, str] = {}
-    if _GITHUB_TOKEN and ("github.com" in url or "githubusercontent.com" in url):
+    # Parse the URL and check the hostname rather than substring-matching
+    # on the full URL string (CodeQL py/incomplete-url-substring-sanitization).
+    # `https://evil.com/?u=github.com` would have passed the substring check.
+    try:
+        parsed_host = urllib.parse.urlparse(url).hostname or ""
+    except ValueError:
+        parsed_host = ""
+    is_github_host = parsed_host == "github.com" or parsed_host.endswith(
+        (".github.com", ".githubusercontent.com")
+    ) or parsed_host == "githubusercontent.com"
+    if _GITHUB_TOKEN and is_github_host:
        headers["Authorization"] = f"Bearer {_GITHUB_TOKEN}"
    try:
        req = urllib.request.Request(url, headers=headers)
@@ -3,6 +3,9 @@ name: E2E Tests
 on:
  workflow_call:

+permissions:
+  contents: read
+
 jobs:
  check-changes:
    name: Check web module changes
@@ -3,6 +3,9 @@ name: Quality Checks
 on:
  workflow_call:

+permissions:
+  contents: read
+
 jobs:
  format:
    runs-on: ubuntu-latest
@@ -11,7 +14,7 @@ jobs:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
        with:
-          node-version: 20
+          node-version: 22
          cache: npm
          cache-dependency-path: package-lock.json
      - run: npm ci
@@ -24,7 +27,7 @@ jobs:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
        with:
-          node-version: 20
+          node-version: 22
          cache: npm
          cache-dependency-path: package-lock.json
      - run: npm ci
@@ -95,31 +95,33 @@ jobs:

          # Validate PR number is a positive integer (artifact comes from
          # untrusted fork code, so treat contents defensively).
-          PR_NUM=$(cat "$DIR/pr_number" | tr -d '[:space:]')
+          PR_NUM=$(tr -d '[:space:]' < "$DIR/pr_number")
          if ! [[ "$PR_NUM" =~ ^[0-9]+$ ]]; then
            echo "skip=true" >> "$GITHUB_OUTPUT"
            echo "::error::Invalid PR number in artifact: '$PR_NUM'"
            exit 0
          fi

-          echo "skip=false"              >> "$GITHUB_OUTPUT"
-          echo "pr_number=$PR_NUM"       >> "$GITHUB_OUTPUT"
          # Validate job-result strings against known GitHub Actions values.
          # Artifact contents come from the PR workflow (potentially untrusted
          # fork code), so we whitelist to prevent newline injection into
          # GITHUB_OUTPUT.
          validate_result() {
            local val
-            val=$(cat "$1" | tr -d '[:space:]')
+            val=$(tr -d '[:space:]' < "$1")
            case "$val" in
              success|failure|cancelled|skipped) echo "$val" ;;
              *) echo "unknown" ;;
            esac
          }

-          echo "quality=$(validate_result "$DIR/quality_result")"        >> "$GITHUB_OUTPUT"
-          echo "tests=$(validate_result "$DIR/tests_result")"            >> "$GITHUB_OUTPUT"
-          echo "e2e=$(validate_result "$DIR/e2e_result")"                >> "$GITHUB_OUTPUT"
+          {
+            echo "skip=false"
+            echo "pr_number=$PR_NUM"
+            echo "quality=$(validate_result "$DIR/quality_result")"
+            echo "tests=$(validate_result "$DIR/tests_result")"
+            echo "e2e=$(validate_result "$DIR/e2e_result")"
+          } >> "$GITHUB_OUTPUT"

      - name: Checkout (for vitest config)
        if: steps.meta.outputs.skip != 'true'
@@ -138,14 +140,15 @@ jobs:
            const fs = require('fs');
            const path = require('path');

-            // Find the latest successful CI run on main
+            // Find recent successful CI runs on main (check several in case
+            // the most recent artifact has expired).
            const runs = await github.rest.actions.listWorkflowRuns({
              owner: context.repo.owner,
              repo: context.repo.repo,
              workflow_id: 'ci.yml',
              branch: 'main',
              status: 'success',
-              per_page: 1,
+              per_page: 5,
            });

            if (runs.data.workflow_runs.length === 0) {
@@ -154,32 +157,47 @@ jobs:
              return;
            }

-            const mainRunId = runs.data.workflow_runs[0].id;
-            const artifacts = await github.rest.actions.listWorkflowRunArtifacts({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              run_id: mainRunId,
-            });
+            // Try each run until we find a downloadable test-reports artifact
+            for (const run of runs.data.workflow_runs) {
+              const artifacts = await github.rest.actions.listWorkflowRunArtifacts({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                run_id: run.id,
+              });

-            const testReports = artifacts.data.artifacts.find(a => a.name === 'test-reports');
-            if (!testReports) {
-              core.setOutput('found', 'false');
-              core.info('No test-reports artifact on main branch');
-              return;
+              const testReports = artifacts.data.artifacts.find(a => a.name === 'test-reports');
+              if (!testReports) {
+                core.info(`Run ${run.id}: no test-reports artifact, trying next`);
+                continue;
+              }
+
+              try {
+                const zip = await github.rest.actions.downloadArtifact({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  artifact_id: testReports.id,
+                  archive_format: 'zip',
+                });
+
+                const dest = path.join(process.env.RUNNER_TEMP, 'base-coverage');
+                fs.mkdirSync(dest, { recursive: true });
+                fs.writeFileSync(path.join(dest, 'base.zip'), Buffer.from(zip.data));
+                core.setOutput('found', 'true');
+                core.setOutput('dir', dest);
+                return;
+              } catch (err) {
+                // 410 Gone means the artifact expired; try the next run
+                if (err.status === 410 || err.response?.status === 410) {
+                  core.info(`Run ${run.id}: artifact expired, trying next`);
+                  continue;
+                }
+                throw err;
+              }
            }

-            const zip = await github.rest.actions.downloadArtifact({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              artifact_id: testReports.id,
-              archive_format: 'zip',
-            });
-
-            const dest = path.join(process.env.RUNNER_TEMP, 'base-coverage');
-            fs.mkdirSync(dest, { recursive: true });
-            fs.writeFileSync(path.join(dest, 'base.zip'), Buffer.from(zip.data));
-            core.setOutput('found', 'true');
-            core.setOutput('dir', dest);
+            // All attempts exhausted — no usable base coverage
+            core.setOutput('found', 'false');
+            core.info('No downloadable test-reports artifact found on main (all expired or missing)');

      - name: Extract base coverage
        if: steps.meta.outputs.skip != 'true' && steps.base-coverage.outputs.found == 'true'
@@ -234,7 +252,7 @@ jobs:
              printf -v "${prefix}_BRANCH_COV" '%s' ""
              printf -v "${prefix}_FUNCS_COV" '%s' ""
              printf -v "${prefix}_LINES_COV" '%s' ""
-              return 1
+              return 0
            fi
          }

@@ -263,14 +281,17 @@ jobs:
            fi
          }

-          read CLI_T CLI_P CLI_F CLI_S CLI_SU CLI_D <<< "$(sum_results "$RESULTS_FILE")"
-          read WEB_T WEB_P WEB_F WEB_S WEB_SU WEB_D <<< "$(sum_results "$WEB_RESULTS_FILE")"
+          # `_` placeholder for the suite-count column — positional
+          # readability for sum_results' 6-field output, but the value
+          # isn't surfaced in the report (suites are tracked per-test
+          # framework, not as a top-line metric).
+          read -r CLI_T CLI_P CLI_F CLI_S _ CLI_D <<< "$(sum_results "$RESULTS_FILE")"
+          read -r WEB_T WEB_P WEB_F WEB_S _ WEB_D <<< "$(sum_results "$WEB_RESULTS_FILE")"

          TOTAL=$((CLI_T + WEB_T))
          PASSED=$((CLI_P + WEB_P))
          FAILED=$((CLI_F + WEB_F))
          SKIPPED=$((CLI_S + WEB_S))
-          SUITES=$((CLI_SU + WEB_SU))
          DURATION=$((CLI_D > WEB_D ? CLI_D : WEB_D))

          # ── Status helpers ──
@@ -24,17 +24,32 @@ name: Scope Resolution Parity
 # When the set is empty (e.g. mid-Ring-3 for every language), the parity
 # matrix is skipped and the workflow reports success — no-op until a
 # language is explicitly claimed migrated.
+#
+# ── Consolidation (chore/vitest-speed-strategy) ────────────────────────
+# Previously each language was a separate GitHub Actions matrix job,
+# meaning N languages × 1 checkout+install+build per shard. The build
+# cost dwarfed the test cost (~5 min setup for ~15 sec test execution).
+#
+# Now a single job runs `scripts/run-parity.ts` which loops through all
+# migrated languages sequentially (2 vitest invocations per language:
+# legacy + registry-primary). All failures are collected and reported
+# at the end (equivalent to the old fail-fast: false behavior).
+#
+# Adding a new language to MIGRATED_LANGUAGES still requires no workflow
+# edit — the script auto-discovers the set at runtime.

 on:
  workflow_call:

+permissions:
+  contents: read
+
 jobs:
  discover:
    name: Discover migrated languages
    runs-on: ubuntu-latest
    timeout-minutes: 5
    outputs:
-      languages: ${{ steps.read.outputs.languages }}
      has-any: ${{ steps.read.outputs.has-any }}
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
@@ -46,65 +61,27 @@ jobs:
        working-directory: gitnexus
        run: |
          set -euo pipefail
-          # `tsx` evaluates the TS source directly (no build step), imports
-          # the exported `Set`, and emits a GH-Actions-friendly JSON matrix.
          LANGS=$(npx tsx scripts/ci-list-migrated-languages.ts)
          COUNT=$(printf '%s' "$LANGS" | jq 'length')
          HAS_ANY="false"
          if [[ "$COUNT" -gt 0 ]]; then HAS_ANY="true"; fi
-          echo "languages=$LANGS" >> "$GITHUB_OUTPUT"
          echo "has-any=$HAS_ANY" >> "$GITHUB_OUTPUT"
          echo "Discovered $COUNT migrated language(s): $LANGS"
-          echo "Parity matrix will run: $HAS_ANY"
+          echo "Parity will run: $HAS_ANY"

  parity:
-    name: ${{ matrix.lang.slug }} parity
+    name: scope-resolution parity
    needs: discover
    if: needs.discover.outputs.has-any == 'true'
    runs-on: ubuntu-latest
-    timeout-minutes: 20
-    strategy:
-      # One language failing must not abort the others — we want the full
-      # parity matrix result on a single CI run so a reviewer sees every
-      # regression at once rather than one-at-a-time.
-      fail-fast: false
-      matrix:
-        lang: ${{ fromJSON(needs.discover.outputs.languages) }}
+    timeout-minutes: 30
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
      - uses: ./.github/actions/setup-gitnexus
        with:
          build: 'true'

-      - name: Verify resolver test file exists
+      - name: Run parity for all migrated languages
        shell: bash
        working-directory: gitnexus
-        run: |
-          set -euo pipefail
-          TEST_FILE="test/integration/resolvers/${{ matrix.lang.slug }}.test.ts"
-          if [[ ! -f "$TEST_FILE" ]]; then
-            echo "::error title=Missing resolver test::\
-          Expected $TEST_FILE for '${{ matrix.lang.slug }}' (listed in \
-          MIGRATED_LANGUAGES). Either fix the slug or add the test file \
-          before listing this language as migrated."
-            exit 1
-          fi
-
-      - name: Resolver tests — legacy DAG (REGISTRY_PRIMARY_${{ matrix.lang.envvar }}=0)
-        shell: bash
-        working-directory: gitnexus
-        env:
-          FLAG_NAME: REGISTRY_PRIMARY_${{ matrix.lang.envvar }}
-        # Explicitly force the flag to `0` even though it also defaults to
-        # `MIGRATED_LANGUAGES.has(lang)` — once a language is in the set,
-        # the default flips to registry-primary, so an unset env var would
-        # silently re-run the same path as step #2. `env FOO=0 cmd` spawns
-        # `cmd` with the override scoped to just this invocation.
-        run: env "$FLAG_NAME=0" npx vitest run "test/integration/resolvers/${{ matrix.lang.slug }}.test.ts"
-
-      - name: Resolver tests — registry-primary (REGISTRY_PRIMARY_${{ matrix.lang.envvar }}=1)
-        shell: bash
-        working-directory: gitnexus
-        env:
-          FLAG_NAME: REGISTRY_PRIMARY_${{ matrix.lang.envvar }}
-        run: env "$FLAG_NAME=1" npx vitest run "test/integration/resolvers/${{ matrix.lang.slug }}.test.ts"
+        run: npx tsx scripts/run-parity.ts
@@ -3,6 +3,9 @@ name: Tests
 on:
  workflow_call:

+permissions:
+  contents: read
+
 jobs:
  tests:
    name: ubuntu / coverage
@@ -56,19 +59,125 @@ jobs:
            gitnexus-web/web-test-results.json
          retention-days: 5

+  # Platform-sensitive subset only — the full suite runs on Ubuntu above.
+  # See gitnexus/scripts/cross-platform-tests.ts for the file list and
+  # rationale for each included test.
  cross-platform:
-    name: ${{ matrix.os }}
+    name: ${{ matrix.os }} (platform-sensitive)
    strategy:
      fail-fast: false
      matrix:
        # Ubuntu already covered by the coverage job above
        os: [windows-latest, macos-latest]
    runs-on: ${{ matrix.os }}
-    timeout-minutes: 25
+    timeout-minutes: 20
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
      - uses: ./.github/actions/setup-gitnexus
        with:
          build: 'true'
-      - run: npx vitest run
+      - name: Run platform-sensitive tests
+        run: npx tsx scripts/run-cross-platform.ts
        working-directory: gitnexus
+
+  # End-to-end smoke test for the #1728 packaging fix: pack the published
+  # tarball, install it globally into a temp prefix, and assert no junction
+  # creation (the EPERM root cause) plus working CLI plus vendor cleanliness
+  # (#836). Runs on windows-latest because that is the platform the fix
+  # targets; the in-repo `npm ci` job above only exercises the dev-tree path
+  # and skips the tarball reify step where the historical EPERM occurred.
+  packaged-install-smoke:
+    name: packaged install smoke (${{ matrix.os }})
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [windows-latest, ubuntu-latest]
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 15
+    steps:
+      # persist-credentials: false — this job runs npm pack + npm install -g
+      # from a tarball and never pushes back; the token in .git/config would
+      # be at risk of leaking through any future artifact-upload step
+      # (zizmor artipacked audit). Disable upfront.
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - uses: ./.github/actions/setup-gitnexus
+        with:
+          build: 'true'
+
+      - name: Pack gitnexus tarball
+        shell: bash
+        run: npm pack
+        working-directory: gitnexus
+
+      - name: Install gitnexus tarball into isolated prefix
+        shell: bash
+        run: |
+          set -euo pipefail
+          PREFIX="$RUNNER_TEMP/gitnexus-smoke"
+          mkdir -p "$PREFIX"
+          TARBALL=$(find . -maxdepth 1 -name 'gitnexus-*.tgz' -print -quit)
+          if [ -z "$TARBALL" ]; then
+            echo "ERROR: no gitnexus-*.tgz tarball found in $(pwd)" >&2
+            exit 1
+          fi
+          echo "Installing $TARBALL into $PREFIX"
+          npm install -g --prefix "$PREFIX" "./$TARBALL" --no-audit --no-fund
+          echo "PREFIX=$PREFIX" >> "$GITHUB_ENV"
+        working-directory: gitnexus
+
+      - name: Assert no junctions or vendor build artifacts
+        shell: bash
+        run: |
+          set -euo pipefail
+          # Locate the installed gitnexus package across npm prefix layouts
+          # (lib/node_modules on POSIX, node_modules on Windows).
+          for candidate in "$PREFIX/lib/node_modules/gitnexus" "$PREFIX/node_modules/gitnexus"; do
+            if [ -d "$candidate" ]; then
+              INSTALLED="$candidate"
+              break
+            fi
+          done
+          if [ -z "${INSTALLED:-}" ]; then
+            echo "ERROR: installed gitnexus package not found under $PREFIX" >&2
+            ls -la "$PREFIX" || true
+            exit 1
+          fi
+          echo "Installed package at: $INSTALLED"
+
+          # #836 invariant: no node_modules/ or build/ under any vendor/*.
+          BAD=$(find "$INSTALLED/vendor" \( -name node_modules -o -name build \) -print 2>/dev/null || true)
+          if [ -n "$BAD" ]; then
+            echo "ERROR: vendor tree contains forbidden build artifacts (#836):" >&2
+            echo "$BAD" >&2
+            exit 1
+          fi
+
+          # #1728 invariant: materialized grammar dirs are real directories,
+          # not junctions/symlinks (which is what the EPERM regression created).
+          for name in tree-sitter-dart tree-sitter-proto tree-sitter-swift; do
+            entry="$INSTALLED/node_modules/$name"
+            if [ ! -e "$entry" ]; then
+              echo "WARN: $name not materialized (toolchain/prebuild may be unavailable on $RUNNER_OS)"
+              continue
+            fi
+            if [ -L "$entry" ]; then
+              echo "ERROR: $entry is a symlink/junction — #1728 regression" >&2
+              exit 1
+            fi
+            if [ ! -d "$entry" ]; then
+              echo "ERROR: $entry is not a directory" >&2
+              exit 1
+            fi
+          done
+
+      - name: Assert gitnexus --version works
+        shell: bash
+        run: |
+          set -euo pipefail
+          if [ "$RUNNER_OS" = "Windows" ]; then
+            "$PREFIX/gitnexus.cmd" --version
+          else
+            "$PREFIX/bin/gitnexus" --version
+          fi
@@ -6,16 +6,19 @@ on:
    paths-ignore: ['**.md', 'docs/**', 'LICENSE']
  workflow_call:

+permissions:
+  contents: read
+
 # Concurrency convention: see CONTRIBUTING.md → "GitHub Actions — Concurrency Convention".
 # Hardcoded `CI-` prefix (not `${{ github.workflow }}`) because this workflow is
-# invoked as a reusable workflow from publish.yml and release-candidate.yml. In
-# called-workflow context `github.workflow` evaluation is ambiguous across GitHub
-# Actions versions, and a prefix that could resolve to the caller's name would
-# share a concurrency group with the caller → deadlock. A literal prefix is
-# immune. Direct `pull_request` invocations use `CI-<ref>`; invocations from a
-# reusable-workflow caller fall into a per-run-unique group that never serializes
-# with the caller. `push` to main is handled by release-candidate.yml, which
-# calls this workflow once before publishing.
+# invoked as a reusable workflow from publish.yml. In called-workflow context
+# `github.workflow` evaluation is ambiguous across GitHub Actions versions, and a
+# prefix that could resolve to the caller's name would share a concurrency group
+# with the caller → deadlock. A literal prefix is immune. Direct `pull_request`
+# invocations use `CI-<ref>`; invocations from a reusable-workflow caller fall
+# into a per-run-unique group that never serializes with the caller. `push` to
+# main is handled by publish.yml (RC mode), which calls this workflow once
+# before publishing.
 concurrency:
  group: ${{ github.event_name == 'pull_request' && format('CI-{0}', github.ref) || format('CI-nested-{0}', github.run_id) }}
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
@@ -19,6 +19,9 @@ on:
  pull_request_review:
    types: [submitted]

+permissions:
+  contents: read
+
 # Concurrency convention: see CONTRIBUTING.md → "GitHub Actions — Concurrency Convention".
 # Serialize per-PR/issue to avoid racing comments.
 concurrency:
@@ -155,6 +158,8 @@ jobs:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          allowed_non_write_users: '*'
          show_full_output: true
+          # Review posts use Bash (`gh`, etc.); default mode asks for approval — impossible in CI.
+          claude_args: '--dangerously-skip-permissions'
          plugin_marketplaces: 'https://github.com/anthropics/claude-code.git'
          plugins: 'code-review@claude-code-plugins'
-          prompt: '/code-review:code-review ${{ github.repository }}/pull/${{ steps.pr.outputs.number }}'
+          prompt: '/code-review:code-review https://github.com/${{ github.repository }}/pull/${{ steps.pr.outputs.number }} --comment'
@@ -0,0 +1,74 @@
+name: CodeQL
+
+# Static analysis (SAST) for TypeScript/JavaScript and Python sources.
+# Findings upload to the GitHub Security tab as SARIF.
+#
+# Advisory only on first introduction — see docs/plans/2026-05-03-001-feat-automated-security-scans-plan.md.
+# Promote to a required check after baseline triage (operator decision).
+
+on:
+  pull_request:
+    branches: [main]
+    paths-ignore: ['**.md', 'docs/**', 'LICENSE']
+  push:
+    branches: [main]
+  schedule:
+    # Weekly Monday 06:00 UTC — catches advisories newly published against
+    # already-merged code without waiting for the next PR.
+    - cron: '0 6 * * 1'
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
+jobs:
+  analyze:
+    name: Analyze (${{ matrix.language }})
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    permissions:
+      actions: read
+      contents: read
+      # security-events:write is what enables SARIF upload to the Security tab.
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [javascript-typescript, python]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          # Don't leave GITHUB_TOKEN in .git/config for downstream steps to read.
+          persist-credentials: false
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@68bde559dea0fdcac2102bfdf6230c5f70eb485e # v4.35.4
+        with:
+          languages: ${{ matrix.language }}
+          queries: security-and-quality
+          # Exclude generated/vendored code; tune after first-run signal.
+          # gitnexus/vendor/ holds tree-sitter-proto sources (regenerated, not authored).
+          # CodeQL path filters use .gitignore-style globs and do NOT support
+          # brace expansion — list each generated parser file separately.
+          config: |
+            paths-ignore:
+              - '**/dist/**'
+              - '**/node_modules/**'
+              - 'gitnexus/vendor/**'
+              - 'gitnexus/src/core/parsing/**/parser.c'
+              - 'gitnexus/src/core/parsing/**/parser.js'
+              # Test fixtures are intentionally synthetic inputs (broken/unused
+              # code, malformed samples) used to exercise the analyzer. CodeQL
+              # findings here are noise, not real bugs.
+              - '**/test/fixtures/**'
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@68bde559dea0fdcac2102bfdf6230c5f70eb485e # v4.35.4
+        with:
+          category: '/language:${{ matrix.language }}'
@@ -0,0 +1,39 @@
+name: Dependency Review
+
+# Blocks PRs that introduce dependencies with high/critical known vulnerabilities.
+# Reads the dependency graph diff between PR head and base.
+#
+# This is a required-check candidate after one week of clean runs
+# (operator decision — see docs/plans/2026-05-03-001-feat-automated-security-scans-plan.md).
+
+on:
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  review:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    permissions:
+      contents: read
+      # pull-requests:write enables the inline summary comment on failure.
+      pull-requests: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Dependency Review
+        uses: actions/dependency-review-action@a1d282b36b6f3519aa1f3fc636f609c47dddb294 # v5.0.0
+        with:
+          fail-on-severity: high
+          comment-summary-in-pr: on-failure
@@ -25,6 +25,18 @@ on:
          a gitnexus/package.json whose version matches the tag.
        required: true
        type: string
+    # Explicit secret contract — callers pass these by name. Replaces the
+    # blanket `secrets: inherit` pattern (zizmor `secrets-inherit` audit).
+    # GHCR auth uses the implicit GITHUB_TOKEN; only Docker Hub credentials
+    # need to be passed through.
+    secrets:
+      DOCKERHUB_USERNAME:
+        required: true
+      DOCKERHUB_TOKEN:
+        required: true
+
+permissions:
+  contents: read

 # Concurrency convention: see CONTRIBUTING.md → "GitHub Actions — Concurrency Convention".
 # Tag refs are unique per release, so distinct tags run in parallel.
@@ -70,7 +82,7 @@ jobs:

    steps:
      # Only the workflow_call path requires a non-empty `inputs.tag` — callers
-      # (e.g. release-candidate.yml) must pass the RC tag explicitly. On direct
+      # (publish.yml in RC mode) must pass the RC tag explicitly. On direct
      # tag pushes the tag comes from `github.ref`, so `inputs.tag` is always
      # empty and validating it here would break every real release (#1064).
      # The downstream "Verify tag matches gitnexus/package.json version" step
@@ -132,7 +144,7 @@ jobs:
        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0

      - name: Install Cosign
-        uses: sigstore/cosign-installer@cad07c2e89fa2edd6e2d7bab4c1aa38e53f76003 # v4.1.1
+        uses: sigstore/cosign-installer@6f9f17788090df1f26f669e9d70d6ae9567deba6 # v4.1.2

      - name: Log in to GitHub Container Registry
        if: ${{ github.event_name != 'pull_request' && !inputs.dry_run }}
@@ -0,0 +1,48 @@
+name: Gitleaks
+
+# Deterministic in-CI secret scanning. Defense-in-depth on top of GitHub's
+# native secret-scanning push protection (which is a repo Settings toggle —
+# see SECURITY.md for the recommended admin action).
+#
+# PR runs scan the diff (fast); main pushes scan full history.
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
+jobs:
+  gitleaks:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    permissions:
+      contents: read
+      pull-requests: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          # Full history needed for the on-push full-history scan; on PRs the
+          # action diffs against the base ref so the cost is bounded by the PR.
+          fetch-depth: 0
+          # Don't bake the token into the cloned .git/config; downstream
+          # steps (and Gitleaks itself) don't need it for repo operations.
+          persist-credentials: false
+
+      # No GITLEAKS_LICENSE secret is required for OSS / public-repo usage.
+      # If this repo becomes private, the action will require a license key.
+      - name: Gitleaks
+        uses: gitleaks/gitleaks-action@ff98106e4c7b2bc287b24eaf42907196329070c7 # v2.3.9
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITLEAKS_ENABLE_UPLOAD_ARTIFACT: true
+          GITLEAKS_ENABLE_SUMMARY: true
@@ -0,0 +1,595 @@
+name: PR Autofix (apply)
+
+# CHATOPS HALF of the autofix pipeline.
+#
+# Triggered when a contributor comments `/autofix` on a PR. Validates
+# permission, locates the most recent successful `pr-autofix.yml`
+# artifact for the PR's current head SHA, applies the patch to the PR
+# head, and pushes a commit back to the PR branch.
+#
+# This workflow runs from the default branch's copy of the file
+# regardless of where the comment originates -- that's the trust
+# anchor. Comment body and author login are untrusted; both flow
+# through env vars and pattern-matched, never interpolated into shell.
+#
+# Fork PR support: `git push` with the GITHUB_TOKEN succeeds against
+# fork branches only when the contributor enabled "Allow edits by
+# maintainers" on the PR (the default). When they disabled it, we
+# fail loud with a 👎 reaction and an explanation comment.
+
+on:
+  issue_comment:
+    types: [created]
+
+concurrency:
+  # Per-PR scope. issue_comment events expose `github.event.issue.number`
+  # for both PR and Issue comments; the `pull_request != null` guard on
+  # the job ensures we only run on PRs, so this number is the PR number.
+  # cancel-in-progress: false — a second `/autofix` should wait for the
+  # first to finish (idempotency check on the second invocation handles
+  # the no-op case).
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.event.issue.number }}
+  cancel-in-progress: false
+
+permissions: {}
+
+jobs:
+  apply:
+    name: apply-autofix
+    # Pre-filter at the workflow level so non-PR comments and unrelated
+    # comments don't even spawn a runner. The job-level body re-check
+    # below (Step 1) is the strict gate.
+    if: >-
+      github.event.issue.pull_request != null
+      && startsWith(github.event.comment.body, '/autofix')
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    permissions:
+      # React on the triggering comment + post reply comments.
+      pull-requests: write
+      # Push the apply commit to the PR head branch.
+      contents: write
+      # Required by actions/download-artifact to fetch artifacts produced
+      # by a different workflow run.
+      actions: read
+    steps:
+      - name: Validate comment body precisely
+        id: body
+        env:
+          BODY: ${{ github.event.comment.body }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          # Whole-line, case-sensitive match: `^/autofix\s*$`. The
+          # workflow-level startsWith guard is coarse — `please don't
+          # /autofix this code` would pass that filter but fail this one.
+          # We exit silently (no reaction) on body mismatch so quoted
+          # text in unrelated discussions doesn't get a visible response.
+          if [[ ! "${BODY}" =~ ^/autofix[[:space:]]*$ ]]; then
+            echo "Body did not match strict /autofix regex — exiting silently."
+            echo "match=false" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+          echo "match=true" >> "$GITHUB_OUTPUT"
+
+      - name: Validate commenter permission
+        id: perm
+        if: steps.body.outputs.match == 'true'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}
+          COMMENTER: ${{ github.event.comment.user.login }}
+          PR_AUTHOR: ${{ github.event.issue.user.login }}
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          # Retry wrapper for transient 5xx / 429 / network blips.
+          # Mirrors the helper in pr-autofix-publish.yml. Used on
+          # idempotent GETs only; reactions/comment-POSTs are NOT
+          # wrapped (retrying a POST would dupe the resource).
+          gh_retry() {
+            local n=0 max=3
+            while true; do
+              if gh "$@"; then return 0; fi
+              n=$((n+1))
+              if [ "$n" -ge "$max" ]; then return 1; fi
+              sleep $((n * 2))
+            done
+          }
+
+          # Allowlist the commenter login before it flows into a URL.
+          # GitHub usernames: alphanumeric + dashes, max 39 chars.
+          if ! [[ "${COMMENTER}" =~ ^[A-Za-z0-9-]{1,39}$ ]]; then
+            echo "::error::Invalid commenter login format: $(printf '%q' "${COMMENTER}")"
+            echo "allowed=false" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          # Self-comparison: PR author can always /autofix their own PR.
+          if [ "${COMMENTER}" = "${PR_AUTHOR}" ]; then
+            echo "Commenter is PR author — granting access."
+            echo "allowed=true" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          # Repo permission lookup. admin/write/maintain are sufficient.
+          # Distinguish API failure (5xx, 429, network) from genuine
+          # permission denial (404 = not a collaborator). Conflating them
+          # would silently refuse a legitimate maintainer with a public
+          # 👎 every time GitHub blips. gh_retry handles transient blips;
+          # the stderr-grep distinguishes 404 from persistent failure.
+          perm_stderr=$(mktemp)
+          if permission=$(gh_retry api "repos/${GH_REPO}/collaborators/${COMMENTER}/permission" \
+                --jq '.permission' 2>"$perm_stderr"); then
+            echo "Commenter permission: ${permission}"
+            case "${permission}" in
+              admin|write|maintain)
+                echo "allowed=true" >> "$GITHUB_OUTPUT"
+                ;;
+              *)
+                echo "allowed=false" >> "$GITHUB_OUTPUT"
+                ;;
+            esac
+          else
+            err=$(cat "$perm_stderr")
+            echo "Permission lookup stderr: ${err}" >&2
+            # 404 (not a collaborator) is a genuine deny.
+            # Anything else is a transient API/network failure.
+            if grep -qE "HTTP 404|Not Found" "$perm_stderr"; then
+              echo "allowed=false" >> "$GITHUB_OUTPUT"
+            else
+              echo "::error::Permission lookup failed transiently — refusing to act."
+              echo "allowed=api-failed" >> "$GITHUB_OUTPUT"
+            fi
+          fi
+
+      - name: React 😕 on transient permission-API failure
+        if: steps.body.outputs.match == 'true' && steps.perm.outputs.allowed == 'api-failed'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}
+          COMMENT_ID: ${{ github.event.comment.id }}
+          PR: ${{ github.event.issue.number }}
+          RUN_ID: ${{ github.run_id }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+            -f content="confused" >/dev/null
+          gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+            -f body="⚠️ Couldn't verify your repo permission (transient GitHub API failure). Please comment \`/autofix\` again. ([apply run](https://github.com/${GH_REPO}/actions/runs/${RUN_ID}))" \
+            >/dev/null
+          exit 1
+
+      - name: React 👎 on permission denial
+        if: steps.body.outputs.match == 'true' && steps.perm.outputs.allowed == 'false'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}
+          COMMENT_ID: ${{ github.event.comment.id }}
+          PR: ${{ github.event.issue.number }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+            -f content="-1" >/dev/null
+          gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+            -f body="🚫 \`/autofix\` is restricted to users with write access or the PR author. Comment ignored." \
+            >/dev/null
+          # Hard exit so the rest of the job is skipped.
+          exit 1
+
+      - name: React 👀 to acknowledge
+        if: steps.perm.outputs.allowed == 'true'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}
+          COMMENT_ID: ${{ github.event.comment.id }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+            -f content="eyes" >/dev/null
+
+      - name: Resolve PR head and locate autofix run
+        id: locate
+        if: steps.perm.outputs.allowed == 'true'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}
+          PR: ${{ github.event.issue.number }}
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          # Same retry wrapper used in the permission step, repeated
+          # because each YAML `run:` block is a fresh bash session.
+          gh_retry() {
+            local n=0 max=3
+            while true; do
+              if gh "$@"; then return 0; fi
+              n=$((n+1))
+              if [ "$n" -ge "$max" ]; then return 1; fi
+              sleep $((n * 2))
+            done
+          }
+
+          # Fetch PR metadata. All fields here are server-controlled API
+          # output, but we still allowlist before exporting so anything
+          # weird short-circuits before $GITHUB_OUTPUT. Wrapped in
+          # gh_retry so transient blips don't surface as "no autofix run
+          # found" with a wrong remediation.
+          if ! pr_json=$(gh_retry api "repos/${GH_REPO}/pulls/${PR}"); then
+            echo "::error::PR metadata fetch failed after retries."
+            echo "found_status=api-failed" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+          head_sha=$(jq -r '.head.sha' <<< "${pr_json}")
+          head_ref=$(jq -r '.head.ref' <<< "${pr_json}")
+          head_repo=$(jq -r '.head.repo.full_name' <<< "${pr_json}")
+
+          [[ "${head_sha}"  =~ ^[0-9a-f]{40}$                         ]] || { echo "::error::Bad head_sha";  exit 1; }
+          [[ "${head_ref}"  =~ ^[A-Za-z0-9._/-]+$                     ]] || { echo "::error::Bad head_ref";  exit 1; }
+          [[ "${head_repo}" =~ ^[A-Za-z0-9._-]+/[A-Za-z0-9._-]+$      ]] || { echo "::error::Bad head_repo"; exit 1; }
+
+          # Find the latest successful pr-autofix.yml run for this head SHA.
+          if ! runs_json=$(gh_retry api "repos/${GH_REPO}/actions/workflows/pr-autofix.yml/runs?head_sha=${head_sha}&per_page=10"); then
+            echo "::error::Workflow run lookup failed after retries."
+            echo "found_status=api-failed" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          run_id=$(jq -r '[.workflow_runs[] | select(.conclusion == "success")] | .[0].id // empty' <<< "${runs_json}")
+
+          if [ -n "${run_id}" ] && [[ "${run_id}" =~ ^[0-9]+$ ]]; then
+            echo "found_status=success" >> "$GITHUB_OUTPUT"
+            {
+              echo "found=true"
+              echo "head_sha=${head_sha}"
+              echo "head_ref=${head_ref}"
+              echo "head_repo=${head_repo}"
+              echo "run_id=${run_id}"
+            } >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          # No successful run. Distinguish "still running" (producer in
+          # flight after a recent push) from "never ran / all failed".
+          # in_progress / queued / pending / waiting cover the GitHub
+          # workflow-run lifecycle states that precede success/failure.
+          in_progress=$(jq -r '[.workflow_runs[] | select(.status == "in_progress" or .status == "queued" or .status == "pending" or .status == "waiting")] | length' <<< "${runs_json}")
+          if [ "${in_progress:-0}" -gt 0 ]; then
+            echo "::warning::pr-autofix run is still in progress for head ${head_sha}."
+            echo "found_status=in-progress" >> "$GITHUB_OUTPUT"
+          else
+            echo "::warning::No successful pr-autofix run found for head ${head_sha}."
+            echo "found_status=not-found" >> "$GITHUB_OUTPUT"
+          fi
+          # Existing `found` boolean is preserved so downstream gates
+          # (`steps.locate.outputs.found == 'true'`) still work.
+          echo "found=false" >> "$GITHUB_OUTPUT"
+
+      - name: Reply when locate did not yield a usable run
+        if: steps.perm.outputs.allowed == 'true' && steps.locate.outputs.found != 'true'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}
+          COMMENT_ID: ${{ github.event.comment.id }}
+          PR: ${{ github.event.issue.number }}
+          FOUND_STATUS: ${{ steps.locate.outputs.found_status }}
+          RUN_ID: ${{ github.run_id }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          run_url="https://github.com/${GH_REPO}/actions/runs/${RUN_ID}"
+          case "${FOUND_STATUS}" in
+            in-progress)
+              gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+                -f content="confused" >/dev/null
+              gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+                -f body="⏳ A pr-autofix run is still in progress for this PR's current head SHA. Wait for it to finish, then comment \`/autofix\` again. ([apply run](${run_url}))" \
+                >/dev/null
+              ;;
+            api-failed)
+              gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+                -f content="confused" >/dev/null
+              gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+                -f body="⚠️ Couldn't reach the GitHub API to look up the autofix run (transient failure after retries). Please comment \`/autofix\` again. ([apply run](${run_url}))" \
+                >/dev/null
+              ;;
+            *)
+              gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+                -f content="-1" >/dev/null
+              gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+                -f body="🤔 No successful autofix run found for this PR's current head SHA. Push a new commit to trigger one, then comment \`/autofix\` again." \
+                >/dev/null
+              ;;
+          esac
+          exit 1
+
+      # Pinned to v8.0.1. Same SHA as pr-autofix-publish.yml.
+      # `continue-on-error: true` lets the workflow proceed when the
+      # artifact is expired or pruned (1-day retention). The apply
+      # step distinguishes "patch file missing entirely" (artifact-
+      # expired) from "patch file zero bytes" (genuinely empty patch).
+      - name: Download autofix artifact
+        if: steps.locate.outputs.found == 'true'
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        continue-on-error: true
+        with:
+          name: autofix
+          run-id: ${{ steps.locate.outputs.run_id }}
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          path: autofix-in
+
+      # Pinned to v5.0.4. Verify SHA via:
+      #   gh api repos/actions/checkout/git/refs/tags/v5.0.4
+      #
+      # `persist-credentials: false` disables the default behavior where
+      # actions/checkout writes the GITHUB_TOKEN into `.git/config` as an
+      # extraheader. That default is convenient (subsequent git commands
+      # auth automatically) but it means the token is sitting on disk in
+      # the checkout directory — an `actions/upload-artifact` step on
+      # this directory would leak the token. We don't upload, but
+      # zizmor's `credential-persistence` lint flags it defensively.
+      # Push auth is provided inline at push time via the URL.
+      - name: Checkout PR head
+        if: steps.locate.outputs.found == 'true'
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v5.0.4
+        with:
+          repository: ${{ steps.locate.outputs.head_repo }}
+          ref: ${{ steps.locate.outputs.head_sha }}
+          token: ${{ secrets.GITHUB_TOKEN }}
+          persist-credentials: false
+          # Fetch full history so the push doesn't hit shallow-clone errors.
+          fetch-depth: 0
+          path: pr-checkout
+
+      - name: Apply patch and push
+        id: apply
+        if: steps.locate.outputs.found == 'true'
+        env:
+          HEAD_REF: ${{ steps.locate.outputs.head_ref }}
+          HEAD_REPO: ${{ steps.locate.outputs.head_repo }}
+          # The SHA we resolved earlier in `locate` — this is what the
+          # remote ref MUST still equal at push time. If the contributor
+          # force-pushed between resolve and now, the lease fails and
+          # we surface that distinctly from a fork-without-maintainer
+          # -edit push failure.
+          HEAD_SHA: ${{ steps.locate.outputs.head_sha }}
+          # Auth for the push only — never persisted to disk. Provided
+          # via env to avoid interpolating into the shell command line.
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        shell: bash
+        working-directory: pr-checkout
+        run: |
+          set -euo pipefail
+          patch="../autofix-in/autofix.patch"
+
+          # Distinguish artifact-expired (file missing entirely, because
+          # actions/download-artifact ran with continue-on-error and the
+          # 1-day retention had elapsed) from genuinely empty patch
+          # (file present, zero bytes, formatter found nothing).
+          if [ ! -e "$patch" ]; then
+            echo "::warning::Patch file does not exist — autofix artifact likely expired."
+            echo "result=artifact-expired" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          if [ ! -s "$patch" ]; then
+            echo "::warning::Empty patch — nothing to apply."
+            echo "result=empty-patch" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          # Sensitive-paths guard: refuse to apply patches that touch
+          # `.github/` — workflow files, action definitions, CODEOWNERS,
+          # dependabot config, etc. A malicious PR could ship a custom
+          # prettier/ESLint config that reformats workflow YAML; the
+          # producer would then capture those edits in autofix.patch,
+          # and a maintainer running `/autofix` would push them under
+          # `contents: write`. The default GITHUB_TOKEN lacks `workflows`
+          # scope so the platform would reject workflow-file pushes
+          # anyway, but that surfaces as a generic `push-failed` and
+          # misleads users into enabling maintainer-edit. Reject early
+          # with a specific reason. CODEOWNERS and dependabot.yml live
+          # under .github/ but outside .github/workflows/ — the broader
+          # match is intentional (they all govern trust boundaries).
+          if grep -qE '^(diff --git|---|\+\+\+) [ab]?/?\.github/' "$patch"; then
+            echo "::warning::Patch touches .github/ — refusing to apply (sensitive paths)."
+            echo "result=sensitive-paths" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          # Re-entrancy guard: if HEAD itself is an autofix bot commit,
+          # refuse to apply again. Without this, lint/formatter config
+          # drift between runs could pump arbitrary apply commits into
+          # the same PR if an automated agent watches the sticky and
+          # re-fires `/autofix` on each new "fixes-available" surface.
+          # The contributor can still get out by force-pushing a
+          # human-authored commit to revert the autofix and re-trigger.
+          head_author=$(git log -1 --format='%ae' HEAD)
+          head_subject=$(git log -1 --format='%s' HEAD)
+          if [ "${head_author}" = "41898282+github-actions[bot]@users.noreply.github.com" ] \
+             && [[ "${head_subject}" =~ ^chore\(autofix\) ]]; then
+            echo "::warning::HEAD is an autofix bot commit — refusing to re-apply (loop guard)."
+            echo "result=loop-prevented" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          # Idempotency probe: does the forward apply work?
+          if git apply --check "$patch" 2>/dev/null; then
+            echo "Patch applies cleanly — proceeding."
+          elif git apply --check --reverse "$patch" 2>/dev/null; then
+            # Reverse-check passes => the patch is already applied to
+            # the current tree. Treat as success no-op.
+            echo "Patch is already applied (reverse-check passed) — no-op."
+            echo "result=already-applied" >> "$GITHUB_OUTPUT"
+            exit 0
+          else
+            echo "::error::Patch does not apply (stale or conflicting)."
+            echo "result=stale" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          # Wrap the apply/commit phase so any non-zero exit sets a
+          # meaningful `result=` instead of leaving it unset (which would
+          # send the user to the `*` "unexpected state" arm with a
+          # non-actionable confused-emoji reply).
+          if ! {
+            git config user.email "41898282+github-actions[bot]@users.noreply.github.com" &&
+            git config user.name  "github-actions[bot]" &&
+            git apply "$patch" &&
+            git add -A &&
+            git commit -m "chore(autofix): apply prettier + eslint fixes via /autofix command"
+          }; then
+            echo "::error::git apply / config / commit failed after idempotency probe passed."
+            echo "result=apply-failed" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          # Push to the PR head branch with a lease against the resolved
+          # SHA. The lease ensures the remote ref still points at HEAD_SHA
+          # when the push lands — if the contributor force-pushed in the
+          # window between resolve and now, the lease fails and we return
+          # `lease-failed` (NOT `push-failed`, which would mislead users
+          # into enabling maintainer-edit). For fork PRs, the push still
+          # requires "Allow edits by maintainers" to be enabled.
+          #
+          # Auth is supplied inline via `-c http.<base>.extraheader` (NOT
+          # via a `https://x-access-token:TOKEN@…` URL — those leak into
+          # process listings and `git remote -v` output). The header is
+          # set per-invocation; it never lands in `.git/config` on disk.
+          # The token is base64-encoded for the Basic auth header per
+          # GitHub's documented pattern for this scope.
+          push_url="https://github.com/${HEAD_REPO}.git"
+          auth_header="Authorization: Basic $(printf 'x-access-token:%s' "${GITHUB_TOKEN}" | base64 -w0)"
+          # GitHub's secret-masker only masks the raw token, not its
+          # base64-encoded form. Mask the encoded value so any subsequent
+          # log line (set -x, GIT_TRACE, error spew) gets ***-redacted.
+          echo "::add-mask::${auth_header}"
+          push_stderr=$(mktemp)
+          if git -c http.extraheader="${auth_header}" \
+                push --force-with-lease="refs/heads/${HEAD_REF}:${HEAD_SHA}" \
+                "${push_url}" "HEAD:${HEAD_REF}" 2>"$push_stderr"; then
+            echo "result=applied" >> "$GITHUB_OUTPUT"
+          else
+            cat "$push_stderr" >&2
+            # `--force-with-lease` reports "stale info" when the remote
+            # ref has moved past the expected SHA. Other lease-failure
+            # phrases git emits include "remote rejected" (server-side
+            # reject), "non-fast-forward", and the literal flag name. Match
+            # any of those to distinguish from auth/network/maintainer-
+            # edit failures.
+            if grep -qE "stale info|force-with-lease|rejected.*non-fast-forward|remote rejected|! \[rejected\]" "$push_stderr"; then
+              echo "::error::git push lease failed — branch moved during apply."
+              echo "result=lease-failed" >> "$GITHUB_OUTPUT"
+            else
+              echo "::error::git push failed — likely fork without maintainer-edit enabled."
+              echo "result=push-failed" >> "$GITHUB_OUTPUT"
+            fi
+            exit 0
+          fi
+
+      - name: React and reply on outcome
+        if: always() && steps.locate.outputs.found == 'true' && steps.apply.outcome != 'skipped'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}
+          COMMENT_ID: ${{ github.event.comment.id }}
+          PR: ${{ github.event.issue.number }}
+          RESULT: ${{ steps.apply.outputs.result }}
+          RUN_ID: ${{ github.run_id }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          run_url="https://github.com/${GH_REPO}/actions/runs/${RUN_ID}"
+
+          case "${RESULT}" in
+            applied)
+              gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+                -f content="+1" >/dev/null
+              gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+                -f body="✅ Applied autofix and pushed a commit. ([apply run](${run_url}))" \
+                >/dev/null
+              ;;
+            already-applied)
+              gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+                -f content="+1" >/dev/null
+              gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+                -f body="✅ Autofix is already applied — no changes needed." \
+                >/dev/null
+              ;;
+            empty-patch)
+              gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+                -f content="+1" >/dev/null
+              gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+                -f body="✅ No autofix to apply — formatter found nothing." \
+                >/dev/null
+              ;;
+            artifact-expired)
+              gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+                -f content="confused" >/dev/null
+              gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+                -f body="⏳ The autofix artifact for this PR's head SHA has expired (1-day retention). Push a new commit to regenerate it, then comment \`/autofix\` again. ([apply run](${run_url}))" \
+                >/dev/null
+              exit 1
+              ;;
+            loop-prevented)
+              gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+                -f content="confused" >/dev/null
+              gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+                -f body="🔁 Refusing to re-apply autofix on top of an existing autofix commit. If formatter rules drifted and you genuinely need another pass, push a human-authored commit (or revert the existing autofix commit) before commenting \`/autofix\` again. ([apply run](${run_url}))" \
+                >/dev/null
+              exit 1
+              ;;
+            sensitive-paths)
+              gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+                -f content="-1" >/dev/null
+              gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+                -f body="🛑 Refusing to apply: the autofix patch touches files under \`.github/\` (workflow / CODEOWNERS / dependabot config). Apply formatter changes to those files manually in a regular commit so they get human review. ([apply run](${run_url}))" \
+                >/dev/null
+              exit 1
+              ;;
+            stale)
+              gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+                -f content="-1" >/dev/null
+              gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+                -f body="⚠️ The autofix patch is stale or conflicts with the current head — push a new commit to regenerate, then comment \`/autofix\` again. ([apply run](${run_url}))" \
+                >/dev/null
+              exit 1
+              ;;
+            apply-failed)
+              gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+                -f content="-1" >/dev/null
+              gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+                -f body="⚠️ Autofix applied cleanly in the dry run, but \`git apply\` / \`git commit\` failed when actually landing the patch. This usually means a race with concurrent edits or a corrupt patch. See logs: ${run_url}" \
+                >/dev/null
+              exit 1
+              ;;
+            push-failed)
+              gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+                -f content="-1" >/dev/null
+              gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+                -f body="⚠️ Couldn't push the autofix commit. If this is a fork PR, please tick **Allow edits by maintainers** in the PR sidebar, then comment \`/autofix\` again. ([apply run](${run_url}))" \
+                >/dev/null
+              exit 1
+              ;;
+            lease-failed)
+              gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+                -f content="-1" >/dev/null
+              gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+                -f body="⚠️ The PR head moved while autofix was applying — a new commit landed in the window between resolve and push. Comment \`/autofix\` again to retry against the latest head. ([apply run](${run_url}))" \
+                >/dev/null
+              exit 1
+              ;;
+            *)
+              gh api -X POST "repos/${GH_REPO}/issues/comments/${COMMENT_ID}/reactions" \
+                -f content="confused" >/dev/null
+              gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+                -f body="❓ Autofix run finished in an unexpected state (\`${RESULT:-unknown}\`). See logs: ${run_url}" \
+                >/dev/null
+              exit 1
+              ;;
+          esac
@@ -0,0 +1,316 @@
+name: PR Autofix (publish)
+
+# TRUSTED HALF of the autofix pipeline.
+#
+# Triggered by `pr-autofix.yml` completing on a PR (including fork PRs).
+# Downloads the diff artifact produced by the untrusted job, verifies
+# its claimed PR identity against the workflow_run authority, then
+# posts (or edits) a single sticky summary comment plus a
+# `gitnexus/autofix` Check Run. This job NEVER checks out fork code —
+# it only consumes the diff (data) and calls the GitHub API. That
+# isolation is what makes it safe to run under `pull-requests: write`
+# on fork-triggered events.
+#
+# The sticky comment is the contributor signal: heading
+# "## :sparkles: PR Autofix" in the PR's top-level comments, with a
+# fenced `gitnexus-autofix` JSON block carrying machine-readable state
+# for AI agents. Contributors apply the patch by commenting `/autofix`
+# on the PR — handled by the separate `pr-autofix-apply.yml` workflow.
+
+on:
+  workflow_run:
+    workflows: ['PR Autofix']
+    types: [completed]
+
+concurrency:
+  # Key on PR identity, NOT workflow_run.id — workflow_run.id is per-run
+  # unique, which would defeat serialization and let two parallel
+  # publishes both POST a sticky summary comment. CONTRIBUTING.md
+  # § GitHub Actions — Concurrency Convention names this anti-pattern
+  # explicitly. For fork PRs, `pull_requests[]` is empty in the
+  # workflow_run payload, so we fall back to head-repo + head-branch.
+  group: ${{ github.workflow }}-${{ github.event.workflow_run.pull_requests[0].number || format('{0}/{1}', github.event.workflow_run.head_repository.full_name, github.event.workflow_run.head_branch) }}
+  cancel-in-progress: false
+
+permissions: {}
+
+jobs:
+  publish:
+    name: publish-autofix
+    if: >-
+      github.event.workflow_run.event == 'pull_request'
+      && github.event.workflow_run.conclusion == 'success'
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    permissions:
+      pull-requests: write
+      # Required by actions/download-artifact to fetch artifacts produced
+      # by a different workflow run.
+      actions: read
+      # Required to create the `gitnexus/autofix` Check Run that reports
+      # the outcome (clean / fixes-available) to the PR's Checks tab.
+      # Branch protection or agents can grep the conclusion + output
+      # title without parsing the sticky comment.
+      checks: write
+    steps:
+      # Pinned to v8.0.1. Verify SHA via:
+      #   gh api repos/actions/download-artifact/git/refs/tags/v8.0.1
+      - name: Download autofix artifact
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: autofix
+          run-id: ${{ github.event.workflow_run.id }}
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          path: autofix-in
+
+      - name: Read and validate metadata
+        id: meta
+        shell: bash
+        run: |
+          set -euo pipefail
+          test -f autofix-in/metadata.json
+          jq . autofix-in/metadata.json
+
+          # The artifact comes from the untrusted half running fork code.
+          # Every field is allowlist-validated before it can flow into
+          # $GITHUB_OUTPUT. A newline in head_ref would otherwise let a
+          # malicious branch name inject a second `pr_number=N` line and
+          # redirect this job's reviewdog suggestions / sticky summary
+          # comment onto a victim PR under github-actions[bot] with
+          # pull-requests: write.
+          assert_field() {
+            local key="$1" pattern="$2" value
+            value=$(jq -r ".${key} // empty" autofix-in/metadata.json)
+            if [ -z "$value" ] || ! [[ "$value" =~ $pattern ]]; then
+              echo "::error::metadata.${key} failed allowlist (got: $(printf '%q' "$value"))"
+              exit 1
+            fi
+            printf '%s' "$value"
+          }
+
+          SCHEMA=$(assert_field    schema         '^gitnexus\.pr-autofix/v[0-9]+$')
+          PR_NUMBER=$(assert_field pr_number      '^[0-9]+$')
+          HEAD_SHA=$(assert_field  head_sha       '^[0-9a-f]{40}$')
+          HEAD_REF=$(assert_field  head_ref       '^[A-Za-z0-9._/-]+$')
+          HEAD_REPO=$(assert_field head_repo      '^[A-Za-z0-9._-]+/[A-Za-z0-9._-]+$')
+          BASE_REPO=$(assert_field base_repo      '^[A-Za-z0-9._-]+/[A-Za-z0-9._-]+$')
+          CHANGED=$(assert_field   changed_lines  '^[0-9]+$')
+
+          # Defence-in-depth: refuse to act if the artifact claims to
+          # belong to a different repo than the one that triggered us.
+          if [ "$BASE_REPO" != "${GITHUB_REPOSITORY}" ]; then
+            echo "::error::Artifact base_repo does not match \$GITHUB_REPOSITORY — refusing to publish."
+            exit 1
+          fi
+
+          {
+            echo "schema=${SCHEMA}"
+            echo "pr_number=${PR_NUMBER}"
+            echo "head_sha=${HEAD_SHA}"
+            echo "head_ref=${HEAD_REF}"
+            echo "head_repo=${HEAD_REPO}"
+            echo "base_repo=${BASE_REPO}"
+            echo "changed_lines=${CHANGED}"
+          } >> "$GITHUB_OUTPUT"
+
+      # Cross-verify the artifact's claimed identity against the
+      # GitHub-controlled workflow_run event. The previous step's
+      # allowlist only proves the fields are well-formed — not that
+      # they refer to the PR/SHA that actually triggered this run.
+      # A fork-controlled `npm run lint:fix` could plausibly mutate
+      # metadata.json to reference another PR or SHA, redirecting our
+      # write-scoped sticky/check-run onto an attacker-chosen target.
+      #
+      # Authority sources are all server-controlled GitHub event fields:
+      #   - workflow_run.head_sha
+      #   - workflow_run.head_repository.full_name
+      #   - workflow_run.pull_requests[].number  (within-repo PRs only;
+      #     empty array on fork PRs — fall back to commits/{sha}/pulls)
+      #
+      # Mismatch => fail loud BEFORE any sticky/check-run side effect.
+      - name: Verify metadata against workflow_run authority
+        id: verify
+        if: steps.meta.outputs.changed_lines != '0'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}
+          META_PR_NUMBER: ${{ steps.meta.outputs.pr_number }}
+          META_HEAD_SHA: ${{ steps.meta.outputs.head_sha }}
+          META_HEAD_REPO: ${{ steps.meta.outputs.head_repo }}
+          WF_HEAD_SHA: ${{ github.event.workflow_run.head_sha }}
+          WF_HEAD_REPO: ${{ github.event.workflow_run.head_repository.full_name }}
+          WF_PR_NUMBERS: ${{ toJSON(github.event.workflow_run.pull_requests.*.number) }}
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          # 1) head_sha must match exactly. workflow_run.head_sha is the
+          # commit GitHub actually ran the producer against — definitive.
+          if [ "${META_HEAD_SHA}" != "${WF_HEAD_SHA}" ]; then
+            echo "::error::Artifact head_sha (${META_HEAD_SHA}) does not match workflow_run.head_sha (${WF_HEAD_SHA}) — refusing to publish."
+            exit 1
+          fi
+
+          # 2) head_repo must match exactly. Same authority anchor.
+          if [ "${META_HEAD_REPO}" != "${WF_HEAD_REPO}" ]; then
+            echo "::error::Artifact head_repo (${META_HEAD_REPO}) does not match workflow_run.head_repository (${WF_HEAD_REPO}) — refusing to publish."
+            exit 1
+          fi
+
+          # 3) pr_number must reference an open PR with this head SHA.
+          # Within-repo PRs: workflow_run.pull_requests[] is populated.
+          # Fork PRs: that array is empty by GitHub design — fall back
+          # to the REST commit-to-PRs lookup. Fail closed if the lookup
+          # finds no matching open PR (avoids attacker-forged PR ids).
+          allowed_numbers=$(jq -c '.' <<< "${WF_PR_NUMBERS}")
+          if [ "${allowed_numbers}" = "[]" ]; then
+            echo "workflow_run.pull_requests is empty (fork PR) — falling back to commits/{sha}/pulls."
+            allowed_numbers=$(gh api "repos/${GH_REPO}/commits/${WF_HEAD_SHA}/pulls" \
+              --jq '[.[] | select(.state == "open") | .number]' 2>/dev/null || echo "[]")
+            if [ "${allowed_numbers}" = "[]" ]; then
+              echo "::error::No open PR found for head ${WF_HEAD_SHA} via commits/{sha}/pulls — refusing to publish."
+              exit 1
+            fi
+          fi
+
+          if ! jq -e --argjson n "${META_PR_NUMBER}" 'index($n) != null' <<< "${allowed_numbers}" >/dev/null; then
+            echo "::error::Artifact pr_number (${META_PR_NUMBER}) is not in the authoritative PR list (${allowed_numbers}) — refusing to publish."
+            exit 1
+          fi
+
+          echo "Verified: metadata identity matches workflow_run authority (PR=${META_PR_NUMBER}, head_sha=${META_HEAD_SHA}, head_repo=${META_HEAD_REPO})."
+
+      - name: Upsert sticky summary comment
+        # Only post when ci-quality found something fixable (= the
+        # autofix patch is non-empty). When prettier/eslint are clean
+        # the patch is zero bytes and the sticky comment is pure noise,
+        # so we skip it.
+        if: >-
+          always()
+          && steps.meta.outputs.pr_number != ''
+          && steps.meta.outputs.changed_lines != '0'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}
+          PR: ${{ steps.meta.outputs.pr_number }}
+          CHANGED: ${{ steps.meta.outputs.changed_lines }}
+          HEAD_SHA: ${{ steps.meta.outputs.head_sha }}
+          RUN_ID: ${{ github.run_id }}
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          # Stable heading + marker — agents grep for these exact strings.
+          marker="<!-- gitnexus:pr-autofix-summary -->"
+          heading="## :sparkles: PR Autofix"
+
+          # Single state. The /autofix slash command works for any diff
+          # size — there's no 3K cap and no no-overlap dead-end because
+          # the apply workflow uses `git apply` + push, not the GitHub
+          # review-comment API.
+          ui_state="fixes-available"
+          prose="Found fixable formatting / unused-import issues across **${CHANGED}** changed lines. **Comment \`/autofix\` on this PR to apply them**, or run \`npm run lint:fix && npm run format\` locally."
+
+          # Machine-readable JSON block — agents parse this instead of
+          # regexing English. Fenced code-block info string is
+          # `gitnexus-autofix` so agents can locate it without ambiguity.
+          # Schema bumped from v1 -> v2: adds `apply_command`. The v1
+          # field set is preserved as a superset, but the `state` enum
+          # is redefined (v1: suggestions-posted | skipped-too-large |
+          # diff-no-overlap; v2: fixes-available). v1 readers checking
+          # `schema == 'gitnexus.pr-autofix/v1'` see an unfamiliar version
+          # and fall back to prose, which is the intended migration path.
+          json=$(jq -n -c \
+            --arg state        "${ui_state}" \
+            --argjson pr_number "${PR}" \
+            --argjson changed_lines "${CHANGED}" \
+            --arg head_sha     "${HEAD_SHA}" \
+            --arg run_id       "${RUN_ID}" \
+            '{schema:"gitnexus.pr-autofix/v2", state:$state, pr_number:$pr_number, changed_lines:$changed_lines, head_sha:$head_sha, run_id:$run_id, apply_command:"/autofix"}')
+
+          # Multi-line quoted string instead of a column-0 heredoc — YAML's
+          # `run: |` block ends as soon as a content line dedents below the
+          # block's first-line indent, which would mis-parse the workflow.
+          body="${marker}
+          ${heading}
+
+          ${prose}
+
+          \`\`\`gitnexus-autofix
+          ${json}
+          \`\`\`"
+          # Strip the leading 10-space indent that the YAML block requires
+          # so the rendered comment body starts at column 0.
+          body="$(printf '%s\n' "$body" | sed 's/^          //')"
+
+          # Small retry wrapper for transient 5xx / rate-limit responses
+          # on the GitHub REST API. Three tries with linear backoff. We
+          # only retry GET (idempotent) and PATCH on a known comment id
+          # (idempotent). POST is NOT wrapped — retrying a comment-create
+          # would create duplicates if the first attempt actually landed.
+          gh_retry() {
+            local n=0 max=3
+            while true; do
+              if gh "$@"; then return 0; fi
+              n=$((n+1))
+              if [ "$n" -ge "$max" ]; then return 1; fi
+              sleep $((n * 2))
+            done
+          }
+
+          # Find existing bot comment by the marker and edit-in-place; else create.
+          # CRITICAL: filter by `.user.login == "github-actions[bot]"`. A regular
+          # user posting a comment containing the marker would otherwise be the
+          # `head -n1` match; PATCH on someone else's comment 403s, `set -e`
+          # aborts, and the bot is permanently DoS'd for that PR.
+          existing=$(gh_retry api "repos/${GH_REPO}/issues/${PR}/comments" \
+            --paginate --jq ".[] | select(.user.login == \"github-actions[bot]\" and (.body | contains(\"${marker}\"))) | .id" \
+            | head -n1 || true)
+
+          if [ -n "${existing}" ]; then
+            gh_retry api -X PATCH "repos/${GH_REPO}/issues/comments/${existing}" \
+              -f body="${body}" >/dev/null
+            echo "Updated comment ${existing}."
+          else
+            gh api -X POST "repos/${GH_REPO}/issues/${PR}/comments" \
+              -f body="${body}" >/dev/null
+            echo "Created summary comment."
+          fi
+
+      - name: Emit gitnexus/autofix Check Run
+        # Stable check name `gitnexus/autofix` so PR-watching agents can
+        # `gh pr checks <pr>` and read the conclusion + title without
+        # parsing the sticky comment. Two outcomes:
+        #   clean            → conclusion: success
+        #   fixes-available  → conclusion: neutral
+        # `neutral` does not block branch-protection required-checks but
+        # is visually distinct from a green pass.
+        if: always() && steps.meta.outputs.head_sha != ''
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}
+          HEAD_SHA: ${{ steps.meta.outputs.head_sha }}
+          CHANGED: ${{ steps.meta.outputs.changed_lines }}
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          if [ "${CHANGED}" = "0" ]; then
+            conclusion="success"
+            title="Formatting clean"
+            summary="Prettier and ESLint --fix produced no changes."
+          else
+            conclusion="neutral"
+            title="Autofix available — comment /autofix to apply"
+            summary="Comment \`/autofix\` on this PR to apply formatter + unused-import fixes (works at any diff size). Or run \`npm run lint:fix && npm run format\` locally."
+          fi
+
+          gh api -X POST "repos/${GH_REPO}/check-runs" \
+            -f name="gitnexus/autofix" \
+            -f head_sha="${HEAD_SHA}" \
+            -f status="completed" \
+            -f conclusion="${conclusion}" \
+            -f "output[title]=${title}" \
+            -f "output[summary]=${summary}" \
+            >/dev/null
+          echo "Posted check-run gitnexus/autofix=${conclusion} (${title})"
@@ -0,0 +1,146 @@
+name: PR Autofix
+
+# UNTRUSTED HALF of the autofix pipeline.
+#
+# Runs `npm run lint:fix` + `npm run format` against the PR head
+# (including fork heads) and uploads the resulting diff as an artifact.
+# This job has NO privileged token and CANNOT post to the PR. The trusted
+# `pr-autofix-publish.yml` workflow downloads the artifact via
+# `workflow_run` and posts a sticky summary comment + Check Run.
+# Contributors apply the patch by commenting `/autofix` on the PR —
+# handled by the separate `pr-autofix-apply.yml` ChatOps workflow.
+#
+# Why the split:
+#   ESLint loads plugins from fork-controlled `node_modules`, so running
+#   it in a job with `pull-requests: write` would let a malicious fork PR
+#   ship a poisoned eslint plugin and execute arbitrary code under that
+#   token. By keeping fork code execution in this job (token: read-only)
+#   and posting from a separate trusted job that never touches fork
+#   code, we get the autofix UX for fork PRs without the supply-chain
+#   hole. (See autofix.ci for the same pattern.)
+#
+# Removes unused imports via `eslint-plugin-unused-imports`, already in
+# devDependencies and wired into the `lint` config.
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+    # Skip lockfile / generated-file PRs entirely — `action-suggester`
+    # cannot post on diffs > ~3k lines (GitHub returns 406) and these
+    # paths produce massive diffs no human wants suggested back inline.
+    paths-ignore:
+      - '**/package-lock.json'
+      - '**/*.snap'
+      - '**/dist/**'
+      - '**/node_modules/**'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+  # Don't cancel in-flight runs; the publish workflow may already be
+  # downloading the artifact and a cancelled untrusted run produces no
+  # signal at all (worse DX than waiting).
+  cancel-in-progress: false
+
+# This workflow runs untrusted fork code. Top-level deny-all and NO
+# job-level grants — the job can only read its own checkout.
+permissions: {}
+
+jobs:
+  autofix:
+    name: autofix
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          # PR head commit (not the synthetic merge ref) — we need the
+          # exact tree the contributor pushed so suggestions line up.
+          ref: ${{ github.event.pull_request.head.sha }}
+          repository: ${{ github.event.pull_request.head.repo.full_name }}
+          persist-credentials: false
+
+      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
+        with:
+          node-version: 22
+          cache: npm
+          cache-dependency-path: package-lock.json
+
+      # `--ignore-scripts` blocks pre/postinstall lifecycle hooks. ESLint
+      # plugins still load from node_modules (that is the actual escape
+      # hatch on a typical fork), but this job has no token to abuse —
+      # which is the whole point of the split.
+      - run: npm ci --ignore-scripts
+
+      - name: ESLint --fix (removes unused imports)
+        run: npm run lint:fix
+        # Lint errors that --fix can't auto-resolve must not block the
+        # diff artifact — partial fixes are still useful as suggestions.
+        continue-on-error: true
+
+      - name: Prettier --write
+        run: npm run format
+        continue-on-error: true
+
+      - name: Capture diff and metadata
+        id: capture
+        # Pass GitHub-context values via env: rather than `${{ }}`
+        # interpolated directly into the bash body. `head.ref` and
+        # `head.repo.full_name` are fork-controlled strings; expanding
+        # them into shell source is the canonical template-injection
+        # vector zizmor flags. Even though this job has `permissions: {}`,
+        # routing through env: makes it impossible for a future scope
+        # grant to turn into RCE. Inside bash, reference as `$HEAD_REF`
+        # etc. — the values are then plain strings, not code.
+        env:
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+          HEAD_SHA: ${{ github.event.pull_request.head.sha }}
+          HEAD_REF: ${{ github.event.pull_request.head.ref }}
+          HEAD_REPO: ${{ github.event.pull_request.head.repo.full_name }}
+          BASE_REPO: ${{ github.repository }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          mkdir -p autofix-out
+
+          # Produce a unified diff of the working tree vs. the PR head.
+          # Empty diff => nothing to suggest; the publish job short-circuits.
+          git diff --no-color > autofix-out/autofix.patch
+
+          # NOTE: `changed_lines` is the line-count of the patch file,
+          # (hunk headers + context lines + added/removed). Surfaced in
+          # the sticky comment so contributors and AI agents have a
+          # quick size hint before invoking `/autofix`.
+          changed_lines=$(wc -l < autofix-out/autofix.patch | tr -d ' ')
+          echo "changed_lines=${changed_lines}" >> "$GITHUB_OUTPUT"
+
+          # Carry PR identity over to the trusted job. workflow_run
+          # context is base-repo-only, so the publish job needs these
+          # to call the GitHub PR API on the right resource.
+          # CONTRACT: keep this schema in sync with pr-autofix-publish.yml's
+          # `assert_field` validators and the agent-facing JSON block in
+          # the sticky comment. Bump `schema` when changing field names.
+          jq -n \
+            --arg     schema        'gitnexus.pr-autofix/v1' \
+            --argjson pr_number     "${PR_NUMBER}" \
+            --arg     head_sha      "${HEAD_SHA}" \
+            --arg     head_ref      "${HEAD_REF}" \
+            --arg     head_repo     "${HEAD_REPO}" \
+            --arg     base_repo     "${BASE_REPO}" \
+            --argjson changed_lines "${changed_lines}" \
+            '{schema:$schema, pr_number:$pr_number, head_sha:$head_sha, head_ref:$head_ref, head_repo:$head_repo, base_repo:$base_repo, changed_lines:$changed_lines}' \
+            > autofix-out/metadata.json
+
+          echo "--- metadata ---"
+          cat autofix-out/metadata.json
+          echo "--- diff (head) ---"
+          head -c 2000 autofix-out/autofix.patch || true
+
+      # Pinned to v7.0.1. Verify SHA via:
+      #   gh api repos/actions/upload-artifact/git/refs/tags/v7.0.1
+      - name: Upload autofix artifact
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: autofix
+          path: autofix-out/
+          retention-days: 1
+          if-no-files-found: error
@@ -35,6 +35,9 @@ on:
  pull_request_target:
    types: [opened, edited, reopened]

+permissions:
+  contents: read
+
 # Concurrency convention: see CONTRIBUTING.md → "GitHub Actions — Concurrency Convention".
 # Include `github.event_name` so `pull_request` (validate-title) and
 # `pull_request_target` (autolabel) runs for the same PR do NOT share a slot
@@ -105,7 +108,7 @@ jobs:
      # Pinned to v7.2.0. Verify SHA via:
      #   gh api repos/release-drafter/release-drafter/git/refs/tags/v7.2.0
      # v7 removed `disable-releaser`; use `dry-run: true` to only autolabel.
-      - uses: release-drafter/release-drafter@563bf132657a13ded0b01fcb723c5a58cdd824e2 # v7.2.1
+      - uses: release-drafter/release-drafter@c2e2804cc59f45f57076a99af580d0fedb697927 # v7.3.0
        with:
          config-name: release-drafter.yml
          dry-run: true
@@ -1,57 +1,421 @@
-name: Publish to npm
+name: Publish
+
+# ─────────────────────────────────────────────────────────────────────────────
+# Sole publisher for the `gitnexus` npm package, GitHub Releases, and Docker
+# images. Replaces the former two-workflow design — see issue #1609 for the
+# double-publish race this unification closes.
+#
+# Two release modes, both routed through this file:
+#   • Release candidate (rc)  — triggered by push to `main` or workflow_dispatch.
+#       The RC path computes the next rc version, applies it in-CI, pushes a
+#       detached release commit with v<X.Y.Z>-rc.<N> + rc/<SHA> marker
+#       atomically, then publishes to npm with --tag rc and creates a GitHub
+#       prerelease. RC-only docker.yml invocation follows.
+#   • Stable                  — triggered by push of a v<X.Y.Z> tag (no -rc.*
+#       suffix). Verifies package.json matches the tag, publishes to npm with
+#       --tag latest, creates a stable GitHub Release. No docker (RC-only).
+#
+# ⚠️  SELF-TRIGGER INVARIANT — DO NOT WEAKEN ⚠️
+# The `tags:` filter below uses a negative glob `'!v*-rc.*'` to prevent the
+# workflow from re-triggering itself when the RC path pushes its own v-tag.
+# Without this exclusion, every RC publish double-fires (the bug fixed by
+# #1609). If a NEW prerelease channel is introduced (e.g. `-beta.N`,
+# `-alpha.N`, `-next.N`), the negative-glob list MUST be extended in
+# lock-step or self-trigger returns. The same invariant applies to the
+# `Classify` step further below — its accepted-tag regex must align with
+# the trigger filter's exclusion list.
+# ─────────────────────────────────────────────────────────────────────────────

 on:
  push:
+    branches: [main]
+    paths-ignore:
+      - '**.md'
+      - 'docs/**'
+      - 'LICENSE'
    tags:
+      # Negative-globbed exclusion of RC tags this workflow itself produces
+      # (see the SELF-TRIGGER INVARIANT in the header comment).
      - 'v*'
+      - '!v*-rc.*'
+  workflow_dispatch:
+    inputs:
+      bump:
+        description: >-
+          Cycle policy. 'auto' (default) continues the active rc cycle on
+          this branch if there is one, otherwise bumps patch from latest.
+          Choose 'patch' / 'minor' / 'major' to explicitly start or reset
+          an rc cycle.
+        required: false
+        default: 'auto'
+        type: choice
+        options:
+          - auto
+          - patch
+          - minor
+          - major
+      force:
+        description: 'Publish even when HEAD already has an rc marker'
+        required: false
+        default: 'false'
+        type: choice
+        options:
+          - 'false'
+          - 'true'
+# Workflow-level deny-all; each job declares the minimum it needs.
+permissions: {}

-# No workflow-level permissions — scoped per job below.
-
-# Concurrency convention: see CONTRIBUTING.md → "GitHub Actions — Concurrency Convention".
-# Tag refs are unique per release, so distinct tags run in parallel. Re-pushes of the
-# same tag serialize. cancel-in-progress: false — never cancel a publish mid-flight.
+# Distinct refs (refs/heads/main, refs/tags/v*) run in parallel. The
+# release-PR-skip in rc-guard is the load-bearing invariant that prevents
+# an RC main-push and a stable tag-push colliding on the same release commit.
 concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: false

 jobs:
+  # ── Phase 1: classify the triggering event into a release mode ─────────────
+  route:
+    name: Classify release event
+    runs-on: ubuntu-latest
+    timeout-minutes: 2
+    permissions:
+      contents: read
+    outputs:
+      mode: ${{ steps.classify.outputs.mode }}
+      head_sha: ${{ steps.classify.outputs.head_sha }}
+      bump_input: ${{ inputs.bump }}
+      force_input: ${{ inputs.force }}
+    steps:
+      - name: Classify
+        id: classify
+        shell: bash
+        env:
+          EVENT_NAME: ${{ github.event_name }}
+          GH_REF: ${{ github.ref }}
+          GH_REF_NAME: ${{ github.ref_name }}
+        run: |
+          set -euo pipefail
+
+          HEAD_SHA="${GITHUB_SHA}"
+          echo "head_sha=${HEAD_SHA}" >> "$GITHUB_OUTPUT"
+
+          # Sanitize before logging (annotation-injection defense in depth).
+          REF_SAFE="${GH_REF//::/__}"
+          REF_NAME_SAFE="${GH_REF_NAME//::/__}"
+          echo "event=${EVENT_NAME} ref=${REF_SAFE} ref_name=${REF_NAME_SAFE}"
+
+          MODE=""
+          case "${EVENT_NAME}" in
+            workflow_dispatch)
+              # Manual dispatch is only valid on main — that's the only ref
+              # where a real publish makes sense.
+              if [ "${GH_REF}" = "refs/heads/main" ]; then
+                MODE="rc"
+              else
+                echo "::error::workflow_dispatch is only permitted on refs/heads/main (got ${REF_SAFE})."
+                exit 1
+              fi
+              ;;
+            push)
+              case "${GH_REF}" in
+                refs/heads/main)
+                  MODE="rc"
+                  ;;
+                refs/tags/v*)
+                  # The trigger filter already excluded v*-rc.* tags. Anything
+                  # reaching here is either a stable semver or a malformed v*.
+                  TAG="${GH_REF#refs/tags/}"
+                  if [[ "${TAG}" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+                    MODE="stable"
+                  else
+                    echo "::error::malformed v* tag rejected: ${REF_NAME_SAFE}"
+                    echo "::error::stable tags must match ^v[0-9]+\\.[0-9]+\\.[0-9]+\$"
+                    exit 1
+                  fi
+                  ;;
+                *)
+                  echo "::error::unexpected push ref ${REF_SAFE} reached publish workflow."
+                  exit 1
+                  ;;
+              esac
+              ;;
+            *)
+              echo "::error::unsupported event ${EVENT_NAME}."
+              exit 1
+              ;;
+          esac
+
+          echo "mode=${MODE}" >> "$GITHUB_OUTPUT"
+          echo "Classified as mode=${MODE}"
+
+  # ── Phase 2 (RC only): dedup marker + release-PR skip ──────────────────────
+  rc-guard:
+    name: RC guard (marker + release-PR skip)
+    needs: route
+    if: needs.route.outputs.mode == 'rc'
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    permissions:
+      contents: read
+      pull-requests: read
+    outputs:
+      should_run: ${{ steps.decide.outputs.should_run }}
+      head_sha: ${{ steps.decide.outputs.head_sha }}
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          fetch-depth: 0
+          fetch-tags: true
+          # rc-guard reads only — no git pushes from this job. Skip the
+          # default extraheader credential persistence (artipacked audit).
+          persist-credentials: false
+
+      - name: Decide
+        id: decide
+        shell: bash
+        env:
+          FORCE: ${{ inputs.force }}
+          BUMP_INPUT: ${{ inputs.bump }}
+          EVENT_NAME: ${{ github.event_name }}
+          GH_TOKEN: ${{ github.token }}
+          REPO: ${{ github.repository }}
+        run: |
+          set -euo pipefail
+          HEAD_SHA=$(git rev-parse HEAD)
+          echo "head_sha=$HEAD_SHA" >> "$GITHUB_OUTPUT"
+
+          if [ "$FORCE" = "true" ]; then
+            echo "Force flag set — running regardless of marker tag."
+            echo "should_run=true" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          # Explicit cycle reset on dispatch bypasses dedup.
+          if [ "$EVENT_NAME" = "workflow_dispatch" ] \
+             && [ -n "${BUMP_INPUT:-}" ] \
+             && [ "${BUMP_INPUT:-auto}" != "auto" ]; then
+            echo "Explicit bump=$BUMP_INPUT — bypassing marker dedup."
+            echo "should_run=true" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          # ── Skip when the merge commit corresponds to a release ───────────
+          # This skip is load-bearing: it prevents an RC build firing on the
+          # release-PR commit from racing the imminent stable-tag push on the
+          # same SHA. Two complementary checks:
+          #   1. HEAD subject matches `chore: release vX.Y.Z` (the canonical
+          #      release-PR title). Anchored to require the bare title or the
+          #      squash-merge `(#NNNN)` suffix exactly. Case-insensitive so
+          #      `Chore: Release v1.2.3` (IDE auto-capitalization) still
+          #      matches — prior commit-author conventions left the door open.
+          #   2. Squash-merged PR carries the `release` label.
+          # Either match suppresses the rc build — stable releases publish on
+          # the v-tag instead.
+          HEAD_SUBJECT="$(git log -1 --pretty=%s HEAD)"
+          # Sanitize GitHub-Actions annotation prefixes before logging — even
+          # though %s strips newlines, a crafted subject containing `::error::`
+          # could forge log annotations.
+          HEAD_SUBJECT_SAFE="${HEAD_SUBJECT//::/__}"
+          RELEASE_SUBJECT_RE='^chore:[[:space:]]*release[[:space:]]+v[0-9]+\.[0-9]+\.[0-9]+([[:space:]]+\(#[0-9]+\))?$'
+          shopt -s nocasematch
+          if [[ "$HEAD_SUBJECT" =~ $RELEASE_SUBJECT_RE ]]; then
+            shopt -u nocasematch
+            echo "HEAD commit subject matches a release commit — skipping rc."
+            echo "  subject (sanitised): $HEAD_SUBJECT_SAFE"
+            echo "should_run=false" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+          shopt -u nocasematch
+
+          # Squash-merge commits include `(#NNNN)` at the end of the subject.
+          if [[ "$HEAD_SUBJECT" =~ \(#([0-9]+)\)[[:space:]]*$ ]]; then
+            PR_NUM="${BASH_REMATCH[1]}"
+            echo "Detected squash-merge of PR #$PR_NUM — checking labels."
+            if LABELS_JSON="$(gh pr view "$PR_NUM" --repo "$REPO" --json labels 2>/dev/null)"; then
+              if printf '%s' "$LABELS_JSON" | jq -e '.labels[] | select(.name == "release")' >/dev/null; then
+                echo "PR #$PR_NUM has the 'release' label — skipping rc."
+                echo "should_run=false" >> "$GITHUB_OUTPUT"
+                exit 0
+              fi
+              echo "PR #$PR_NUM has no 'release' label — proceeding."
+            else
+              # Lookup failure is not fatal — fall through to dedup check.
+              echo "::warning::Could not read labels for PR #${PR_NUM} — falling through."
+            fi
+          fi
+
+          # Dedup: is there already an rc/<HEAD_SHA> marker pointing at HEAD?
+          MARKER="rc/${HEAD_SHA}"
+          if git rev-parse "refs/tags/$MARKER" >/dev/null 2>&1; then
+            echo "HEAD already has marker $MARKER — skipping."
+            echo "should_run=false" >> "$GITHUB_OUTPUT"
+          else
+            echo "No marker on HEAD — proceeding."
+            echo "should_run=true" >> "$GITHUB_OUTPUT"
+          fi
+
+  # ── Phase 3: reusable CI gate ──────────────────────────────────────────────
+  # Runs for both rc (when guard says go) and stable. No `secrets:` passed —
+  # ci.yml and its entire reusable-workflow chain (ci-quality, ci-tests,
+  # ci-e2e, ci-scope-parity, ci-report) reference zero `secrets.*` values;
+  # passing any would be unused surface. GITHUB_TOKEN is implicit.
  ci:
+    needs: [route, rc-guard]
+    if: ${{ always() && (needs.route.outputs.mode == 'stable' || needs.rc-guard.outputs.should_run == 'true') }}
    uses: ./.github/workflows/ci.yml
    permissions:
      contents: read
      actions: read
-      # No pull-requests:write — `ci.yml`'s save-pr-meta job is gated on
-      # `github.event_name == 'pull_request'`, so it never runs during a
-      # tag-triggered publish. Least-privilege for release-critical paths.

+  # ── Phase 4: publish to npm + push refs (RC path) ──────────────────────────
+  # INVARIANT: `timeout-minutes` MUST stay below the App-token TTL (~60 min
+  # for actions/create-github-app-token installation tokens). The atomic
+  # tag-push step relies on the token minted at job start; if the job ever
+  # runs longer than the TTL, the push fails with an opaque 401. If you
+  # need to raise the timeout, re-mint the token immediately before the
+  # `Create and push rc tags` step instead.
  publish:
-    needs: ci
+    name: Publish to npm
+    needs: [route, rc-guard, ci]
+    if: ${{ always() && needs.ci.result == 'success' && (needs.route.outputs.mode == 'stable' || needs.rc-guard.outputs.should_run == 'true') }}
    runs-on: ubuntu-latest
-    timeout-minutes: 15
+    timeout-minutes: 20
    permissions:
+      # contents: write — RC path needs it for `git push --atomic` (v-tag +
+      # marker). Stable path runs in the same job and inherits the grant; it
+      # never invokes `git push`, so the elevated scope is unused there.
+      # id-token: write — npm provenance attestation.
      contents: write
      id-token: write
+    outputs:
+      # Two distinct step IDs feed this output; exactly one fires per run.
+      vtag: ${{ steps.rc-tags.outputs.vtag || steps.stable-vtag.outputs.vtag }}
    steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      # ── Mint short-lived GitHub App token (RC only) ──────────────────────
+      # Industry direction (2025-2026): GitHub Apps with
+      # `actions/create-github-app-token` over long-lived PATs for
+      # workflow-touching tag pushes. Same fine-grained permission surface,
+      # ~1h expiry, not tied to a user seat, organizationally auditable.
+      # Replaces a prior fine-grained PAT.
+      #
+      # Required secrets (set in repo Settings → Secrets and variables → Actions):
+      #   secrets.RELEASE_APP_ID         — the App's numeric ID
+      #   secrets.RELEASE_APP_PRIVATE_KEY — the App's PEM private key
+      # (The App ID is technically not sensitive — it's visible on the App's
+      # settings page — but storing it as a secret is harmless and avoids
+      # mixing storage classes for the same App.)
+      # The App must be installed on this repository with:
+      #   - Contents: write         (push the v-tag and rc marker)
+      #   - Workflows: write        (because the v-tag's tree may touch
+      #                              .github/workflows/**, which the default
+      #                              GITHUB_TOKEN cannot author)
+      #   - Metadata: read          (required for the `gh api /users/<slug>[bot]`
+      #                              bot-identity lookup in the tag-push step)
+      - name: Mint GitHub App token (RC)
+        if: needs.route.outputs.mode == 'rc'
+        id: app-token
+        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1 # v3.2.0
+        with:
+          # `client-id` is the renamed input that supersedes the deprecated
+          # `app-id` in v3.x. The action accepts the App's numeric ID or
+          # its Client ID under this name. We pass the numeric App ID,
+          # which the action resolves correctly.
+          client-id: ${{ secrets.RELEASE_APP_ID }}
+          private-key: ${{ secrets.RELEASE_APP_PRIVATE_KEY }}
+
+      # ── Separate checkout steps per mode ─────────────────────────────────
+      # Conditional `token:` expressions are footguns: empty string passed to
+      # actions/checkout fails opaquely, and `|| github.token` silently
+      # degrades a missing token to GITHUB_TOKEN, masking auth failures until
+      # the eventual `git push`. Two distinct steps make the auth contract
+      # explicit and fail loudly at checkout when the App token mint failed
+      # on the RC path.
+      - name: Checkout (RC)
+        if: needs.route.outputs.mode == 'rc'
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          fetch-depth: 0
+          fetch-tags: true
+          # Short-lived GitHub App installation token. Required because the
+          # v-tag push lands at a SHA whose tree may touch
+          # `.github/workflows/**`, which the default GITHUB_TOKEN cannot
+          # author.
+          token: ${{ steps.app-token.outputs.token }}
+          # Do not persist the token in .git/config (artipacked audit). The
+          # RC tag push uses an inline `http.extraheader` at push time only;
+          # the credential never lands on disk. See the
+          # `Create and push rc tags` step below.
+          persist-credentials: false
+
+      - name: Checkout (stable)
+        if: needs.route.outputs.mode == 'stable'
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        # No `token:` — actions/checkout uses GITHUB_TOKEN by default. Stable
+        # path performs no git pushes; the default scope is sufficient.
+        with:
+          # No git pushes from the stable path either. Skip credential
+          # persistence (artipacked audit).
+          persist-credentials: false
+
+      - name: Working-tree sanity
+        # Defense in depth (mirrors the vtag integrity gate, but on the input side):
+        # if a route-mode regression skipped both checkout `if:` gates, all
+        # downstream steps would run on a bare runner and produce confusing
+        # ENOENT errors. Fail loudly and early here instead.
+        shell: bash
+        run: |
+          if [ ! -f gitnexus/package.json ]; then
+            echo "::error::no working tree at gitnexus/package.json — route classification likely failed silently."
+            exit 1
+          fi
+
      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
        with:
-          node-version: 20
-          registry-url: https://registry.npmjs.org
-          cache: npm
-          cache-dependency-path: gitnexus/package-lock.json
+          # Node 24 ships with npm >= 11.5.x, which is the minimum that
+          # supports npm Trusted Publishing OIDC. Node 22 ships with npm
+          # 10.9.x (no OIDC) and `npm install -g npm@latest` to self-upgrade
+          # is fragile — it can crash the in-flight reify with
+          # `MODULE_NOT_FOUND` on `promise-retry` etc. Bumping the Node
+          # version is the clean fix; the package's `engines` field is
+          # `>=22.0.0` so consumer-side compatibility is unaffected (this
+          # Node version is only used during publish, not by package users).
+          node-version: 24
+          # `registry-url:` is intentionally OMITTED. Under npm Trusted
+          # Publishing, OIDC only engages when no credential is configured.
+          # Setting `registry-url:` would make setup-node write
+          # `//registry.npmjs.org/:_authToken=${NODE_AUTH_TOKEN}` into the
+          # runner's .npmrc AND export NODE_AUTH_TOKEN from its `token:`
+          # input (default github.token). `npm publish` would then attempt
+          # GITHUB_TOKEN as the npm token, get rejected with 404, and OIDC
+          # would never be tried. See actions/setup-node#1440 and the GitHub
+          # Community discussion #176761 for the upstream bug and consensus
+          # workaround.
+          #
+          # Hermetic install for published artifacts — opt out of the v5+
+          # default packageManager-based caching (clears the zizmor
+          # cache-poisoning audit). ~30s slower per release; runs rarely.
+          package-manager-cache: false
+
      - name: Build gitnexus-shared
        run: npm install && npm run build
        working-directory: gitnexus-shared

-      - run: npm ci
+      - name: Install gitnexus dependencies
+        run: npm ci
        working-directory: gitnexus

-      - name: Verify version consistency
+      # ── Stable-only: verify the tag and package.json agree ───────────────
+      - name: Verify version consistency (stable)
+        if: needs.route.outputs.mode == 'stable'
        shell: bash
+        working-directory: gitnexus
        run: |
+          set -euo pipefail
          TAG_VERSION="${GITHUB_REF#refs/tags/v}"
-          if ! [[ "$TAG_VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9.]+)?$ ]]; then
-            echo "::error::Tag does not follow semver: v$TAG_VERSION"
+          # Stable mode REJECTS prerelease suffixes — those are filtered at
+          # trigger by the negative-glob filter, but defend at the bash layer too.
+          if ! [[ "$TAG_VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+            echo "::error::Stable tag must be ^v[0-9]+.[0-9]+.[0-9]+$ — got v$TAG_VERSION"
            exit 1
          fi
          PKG_VERSION=$(node -p "require('./package.json').version")
@@ -60,24 +424,376 @@ jobs:
            exit 1
          fi
          echo "Version verified: $PKG_VERSION"
-        working-directory: gitnexus

-      - name: Build
+      # ── RC-only: compute the next rc version against the live registry ──
+      - name: Resolve rc version (rc)
+        id: rc-version
+        if: needs.route.outputs.mode == 'rc'
+        shell: bash
+        working-directory: gitnexus
+        env:
+          BUMP_INPUT: ${{ inputs.bump }}
+          EVENT_NAME: ${{ github.event_name }}
+          PKG_NAME: gitnexus
+        run: |
+          set -euo pipefail
+
+          # 1. Current published `latest` — the floor for any new rc base.
+          #    Only E404 ("never published") falls back to package.json; any
+          #    other error (network, auth, malformed response) fails fast
+          #    (retry-loud policy: never silently substitute on transient errors).
+          NPM_STDERR_LATEST="$(mktemp)"
+          if CURRENT_LATEST="$(npm view "$PKG_NAME" version 2>"$NPM_STDERR_LATEST")"; then
+            :
+          else
+            if grep -qiE 'E404|not found' "$NPM_STDERR_LATEST"; then
+              CURRENT_LATEST="$(node -p "require('./package.json').version")"
+              echo "Package not on registry (E404) — seeding from package.json: $CURRENT_LATEST"
+            else
+              echo "::error::npm registry unreachable for 'view version':" >&2
+              cat "$NPM_STDERR_LATEST" >&2
+              rm -f "$NPM_STDERR_LATEST"
+              exit 1
+            fi
+          fi
+          rm -f "$NPM_STDERR_LATEST"
+          CURRENT_LATEST_CLEAN="${CURRENT_LATEST%%-*}"
+
+          # 2. Full version list — needed for the counter and active-cycle
+          #    inference. Same E404-only fallback.
+          NPM_STDERR_VERSIONS="$(mktemp)"
+          if VERSIONS_JSON="$(npm view "$PKG_NAME" versions --json 2>"$NPM_STDERR_VERSIONS")"; then
+            :
+          else
+            if grep -qiE 'E404|not found' "$NPM_STDERR_VERSIONS"; then
+              VERSIONS_JSON='[]'
+              echo "No published versions for $PKG_NAME yet (E404)."
+            else
+              echo "::error::npm registry unreachable for 'view versions':" >&2
+              cat "$NPM_STDERR_VERSIONS" >&2
+              rm -f "$NPM_STDERR_VERSIONS"
+              exit 1
+            fi
+          fi
+          rm -f "$NPM_STDERR_VERSIONS"
+
+          # 3. Base selection.
+          #    - workflow_dispatch + bump != auto → explicit cycle reset.
+          #    - Otherwise (push, or dispatch with bump=auto) → continue the
+          #      highest active rc base > latest if any; else patch from latest.
+          # Curated wrapper around `npx semver` — bare npx errors are noisy
+          # and don't distinguish registry-unreachable from invalid-bump-spec.
+          semver_bump() {
+            local kind="$1" current="$2" stderr_file out
+            stderr_file="$(mktemp)"
+            if out="$(npx --yes -p semver@7 semver -i "$kind" "$current" 2>"$stderr_file")"; then
+              rm -f "$stderr_file"
+              printf '%s' "$out"
+              return 0
+            fi
+            echo "::error::semver bump failed (kind=${kind}, current=${current}):" >&2
+            cat "$stderr_file" >&2
+            rm -f "$stderr_file"
+            return 1
+          }
+
+          if [ "$EVENT_NAME" = "workflow_dispatch" ] \
+             && [ -n "${BUMP_INPUT:-}" ] \
+             && [ "${BUMP_INPUT:-auto}" != "auto" ]; then
+            BASE="$(semver_bump "$BUMP_INPUT" "$CURRENT_LATEST_CLEAN")"
+            echo "Explicit bump=$BUMP_INPUT → BASE=$BASE"
+          else
+            cat > /tmp/active_base.mjs <<'NODESCRIPT'
+          const latest = process.env.LATEST;
+          let v;
+          try { v = JSON.parse(process.env.VERSIONS_JSON); } catch { v = []; }
+          if (!Array.isArray(v)) v = [v];
+          const parse = s => s.split(".").map(n => parseInt(n, 10));
+          const gt = (a, b) => {
+            const [A, B] = [parse(a), parse(b)];
+            for (let i = 0; i < 3; i++) if (A[i] !== B[i]) return A[i] > B[i];
+            return false;
+          };
+          const bases = new Set();
+          for (const s of v) {
+            const m = /^(\d+\.\d+\.\d+)-rc\.\d+$/.exec(s);
+            if (m && gt(m[1], latest)) bases.add(m[1]);
+          }
+          if (!bases.size) { process.stdout.write(""); process.exit(0); }
+          const sorted = [...bases].sort((a, b) => gt(a, b) ? 1 : -1);
+          process.stdout.write(sorted[sorted.length - 1]);
+          NODESCRIPT
+            ACTIVE_BASE="$(LATEST="$CURRENT_LATEST_CLEAN" VERSIONS_JSON="$VERSIONS_JSON" node /tmp/active_base.mjs)"
+            if [ -n "$ACTIVE_BASE" ]; then
+              BASE="$ACTIVE_BASE"
+              echo "Continuing active rc cycle → BASE=$BASE"
+            else
+              BASE="$(semver_bump patch "$CURRENT_LATEST_CLEAN")"
+              echo "No active rc cycle → patch bump from latest → BASE=$BASE"
+            fi
+          fi
+
+          # 4. Counter: 1 + max existing N for `${BASE}-rc.*`, else 1.
+          cat > /tmp/next_rc.mjs <<'NODESCRIPT'
+          const base = process.env.BASE;
+          const prefix = base + "-rc.";
+          let v;
+          try { v = JSON.parse(process.env.VERSIONS_JSON); } catch { v = []; }
+          if (!Array.isArray(v)) v = [v];
+          const ns = v
+            .filter(s => typeof s === "string" && s.startsWith(prefix))
+            .map(s => parseInt(s.slice(prefix.length), 10))
+            .filter(n => Number.isInteger(n) && n >= 0);
+          process.stdout.write(String(ns.length ? Math.max(...ns) + 1 : 1));
+          NODESCRIPT
+          NEXT_N="$(BASE="$BASE" VERSIONS_JSON="$VERSIONS_JSON" node /tmp/next_rc.mjs)"
+          RC_VERSION="${BASE}-rc.${NEXT_N}"
+          echo "Computed rc: $RC_VERSION"
+
+          # 5. Defensive: if the exact version already exists on the registry
+          #    (race with another run), abort before re-publishing.
+          NPM_STDERR_EXISTS="$(mktemp)"
+          if npm view "$PKG_NAME@$RC_VERSION" version 2>"$NPM_STDERR_EXISTS" >/dev/null; then
+            rm -f "$NPM_STDERR_EXISTS"
+            echo "::error::Version $RC_VERSION already exists on npm — aborting."
+            exit 1
+          else
+            if grep -qiE 'E404|not found' "$NPM_STDERR_EXISTS"; then
+              rm -f "$NPM_STDERR_EXISTS"
+              # Version doesn't exist — safe to proceed.
+            else
+              echo "::error::npm registry unreachable for existence check:" >&2
+              cat "$NPM_STDERR_EXISTS" >&2
+              rm -f "$NPM_STDERR_EXISTS"
+              exit 1
+            fi
+          fi
+
+          {
+            echo "base=$BASE"
+            echo "rc_n=$NEXT_N"
+            echo "rc_version=$RC_VERSION"
+          } >> "$GITHUB_OUTPUT"
+
+      - name: Apply rc version in-CI
+        if: needs.route.outputs.mode == 'rc'
+        shell: bash
+        working-directory: gitnexus
+        run: |
+          set -euo pipefail
+          npm version "${{ steps.rc-version.outputs.rc_version }}" \
+            --no-git-tag-version --allow-same-version
+
+      - name: Build gitnexus
        run: npm run build
        working-directory: gitnexus

      - name: Dry-run publish
-        run: npm publish --dry-run
-        working-directory: gitnexus
-
-      - name: Publish to npm
-        run: npm publish --provenance --access public
+        # Cheap verification that the tarball assembles before the real publish.
+        shell: bash
        working-directory: gitnexus
        env:
-          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+          NPM_TAG: ${{ needs.route.outputs.mode == 'rc' && 'rc' || 'latest' }}
+        run: npm publish --dry-run --tag "$NPM_TAG"

-      - name: Extract release notes from CHANGELOG
+      # ── Acquire the "rc lock" BEFORE publishing (idempotency anchor) ─────
+      # We create two refs and push atomically:
+      #   v<RC_VERSION>  → annotated tag on a detached release commit whose
+      #                    tree contains the rewritten package.json, so the
+      #                    tag's source matches the npm tarball.
+      #   rc/<HEAD_SHA>  → lightweight tag on HEAD; the guard's dedup key.
+      # Push fails → nothing published. Push succeeds, npm fails → marker
+      # blocks retries until manual cleanup (see Rollback Runbook in plan).
+      - name: Create and push rc tags
+        id: rc-tags
+        if: needs.route.outputs.mode == 'rc'
+        shell: bash
+        working-directory: gitnexus
+        env:
+          RC_VERSION: ${{ steps.rc-version.outputs.rc_version }}
+          HEAD_SHA: ${{ needs.rc-guard.outputs.head_sha }}
+          # Short-lived GitHub App token. Auth is supplied inline at push
+          # time via `http.extraheader` (per GitHub's documented
+          # x-access-token Basic pattern). It is NOT persisted in
+          # .git/config (artipacked audit) — checkout above ran with
+          # `persist-credentials: false`.
+          PUSH_TOKEN: ${{ steps.app-token.outputs.token }}
+          # App's slug from create-github-app-token (e.g. `gitnexus-release-bot`).
+          # Used to attribute the release commit to the App identity rather
+          # than the generic github-actions[bot]. The bot's numeric user-id
+          # is resolved at runtime via the GitHub API (the action does not
+          # expose it directly as of v3.2.0).
+          APP_SLUG: ${{ steps.app-token.outputs.app-slug }}
+          GH_TOKEN: ${{ steps.app-token.outputs.token }}
+        run: |
+          set -euo pipefail
+          VTAG="v${RC_VERSION}"
+          MARKER="rc/${HEAD_SHA}"
+
+          # Resolve the App's bot user-id and construct the noreply email
+          # in the GitHub-canonical `<id>+<slug>[bot]@users.noreply.github.com`
+          # shape. `[bot]` is part of the actual login on GitHub.
+          #
+          # The lookup is wrapped in a bounded retry because the first RC
+          # after App installation may hit propagation delay (404), and
+          # transient api.github.com 5xx during heavy org activity is a real
+          # failure class. Without retry, every transient blip aborts the
+          # entire release after CI has already succeeded.
+          BOT_LOGIN="${APP_SLUG}[bot]"
+          BOT_USER_ID=""
+          api_stderr="$(mktemp)"
+          for attempt in 1 2 3; do
+            if BOT_USER_ID="$(gh api "/users/${BOT_LOGIN}" --jq .id 2>"$api_stderr")" \
+               && [[ "${BOT_USER_ID}" =~ ^[0-9]+$ ]]; then
+              break
+            fi
+            BOT_USER_ID=""
+            if [ "$attempt" -lt 3 ]; then
+              echo "::warning::bot user-id lookup attempt ${attempt} failed; retrying in $((attempt * 5))s"
+              sleep $((attempt * 5))
+            fi
+          done
+          if ! [[ "${BOT_USER_ID}" =~ ^[0-9]+$ ]]; then
+            echo "::error::Could not resolve bot user-id for ${BOT_LOGIN} after 3 attempts."
+            echo "::error::gh api stderr:"
+            cat "$api_stderr" >&2 || true
+            echo "::error::Common causes: (a) newly-installed App — user record still propagating to /users/ (wait ~5min, redispatch with force=true); (b) App lacks Metadata: read permission; (c) transient api.github.com 5xx (redispatch)."
+            rm -f "$api_stderr"
+            exit 1
+          fi
+          rm -f "$api_stderr"
+          git config user.name  "${BOT_LOGIN}"
+          git config user.email "${BOT_USER_ID}+${BOT_LOGIN}@users.noreply.github.com"
+
+          # Detached release commit with the version bump — main stays
+          # pristine, but the v-tag's tree matches the published package
+          # exactly (release-integrity).
+          git add package.json package-lock.json 2>/dev/null || git add package.json
+          git commit -m "release: ${VTAG}" --allow-empty
+          RELEASE_SHA="$(git rev-parse HEAD)"
+          echo "Detached release commit: $RELEASE_SHA"
+
+          git tag -a "$VTAG" "$RELEASE_SHA" -m "$VTAG"
+          git tag "$MARKER" "$HEAD_SHA"
+
+          # Inline auth header. The base64-encoded form is masked as well
+          # as the raw token, because GitHub's secret-masker only masks the
+          # raw value — any subsequent `set -x` / GIT_TRACE line would
+          # otherwise expose the encoded credential.
+          #
+          # `set +x` wraps the compute+mask pair so that if an operator
+          # enables ACTIONS_STEP_DEBUG=true for triage (which turns on
+          # `set -x` globally), the assignment is NOT traced for the one
+          # line between compute and mask-registration. Without this wrap,
+          # debug mode would log `+ auth_header='Authorization: Basic <encoded>'`
+          # exposing a still-valid (~1h) App token.
+          { set +x; } 2>/dev/null
+          auth_header="Authorization: Basic $(printf 'x-access-token:%s' "${PUSH_TOKEN}" | base64 -w0)"
+          echo "::add-mask::${auth_header}"
+          # Re-enable tracing only when explicitly requested via step-debug.
+          if [ "${ACTIONS_STEP_DEBUG:-false}" = "true" ]; then set -x; fi
+
+          # Atomic push of both refs. If either would clobber an existing
+          # remote ref, the push fails and we stop before npm publish.
+          git -c http.extraheader="${auth_header}" \
+              push --atomic origin "refs/tags/$VTAG" "refs/tags/$MARKER"
+
+          {
+            echo "vtag=$VTAG"
+            echo "marker=$MARKER"
+            echo "release_sha=$RELEASE_SHA"
+          } >> "$GITHUB_OUTPUT"
+
+      - name: Set vtag (stable)
+        id: stable-vtag
+        if: needs.route.outputs.mode == 'stable'
+        shell: bash
+        # github.ref_name flows in via env to avoid templating into the
+        # shell source (template-injection audit). Even though refs are
+        # constrained by git naming rules, the env-passthrough pattern
+        # makes injection structurally impossible.
+        env:
+          REF_NAME: ${{ github.ref_name }}
+        run: |
+          echo "vtag=${REF_NAME}" >> "$GITHUB_OUTPUT"
+
+      # ── vtag integrity gate ──────────────────────────────────────────────
+      # Fail closed before any artifact-producing step (npm publish, Release,
+      # Docker) runs against an empty or mode-mismatched vtag. Prevents the
+      # silent "Release named main" / "Docker tagged from ref fallback"
+      # failure modes that the previous draft was vulnerable to.
+      - name: vtag integrity gate
+        id: vtag-gate
+        shell: bash
+        env:
+          MODE: ${{ needs.route.outputs.mode }}
+          VTAG: ${{ steps.rc-tags.outputs.vtag || steps.stable-vtag.outputs.vtag }}
+        run: |
+          set -euo pipefail
+
+          if [ -z "$VTAG" ]; then
+            echo "::error::vtag is empty — refusing to create GitHub Release or trigger Docker."
+            exit 1
+          fi
+
+          case "$MODE" in
+            rc)
+              if ! [[ "$VTAG" =~ ^v[0-9]+\.[0-9]+\.[0-9]+-rc\.[0-9]+$ ]]; then
+                echo "::error::vtag '${VTAG}' does not match rc shape ^v[0-9]+.[0-9]+.[0-9]+-rc.[0-9]+$"
+                exit 1
+              fi
+              ;;
+            stable)
+              if ! [[ "$VTAG" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+                echo "::error::vtag '${VTAG}' does not match stable shape ^v[0-9]+.[0-9]+.[0-9]+$"
+                exit 1
+              fi
+              ;;
+            *)
+              echo "::error::unknown mode '${MODE}' at vtag integrity gate."
+              exit 1
+              ;;
+          esac
+
+          echo "vtag verified: ${VTAG} (mode=${MODE})"
+          echo "vtag=${VTAG}" >> "$GITHUB_OUTPUT"
+
+      # npm Trusted Publishing (GA'd 2025-07-31). OIDC authentication only
+      # engages when no npm credential is configured anywhere — the absence
+      # is the signal. Two upstream behaviors had to be neutralized for
+      # this to work:
+      #
+      #   1. setup-node's `registry-url:` is omitted (see the setup-node
+      #      step above). With it, setup-node writes
+      #      `//registry.npmjs.org/:_authToken=${NODE_AUTH_TOKEN}` into
+      #      .npmrc and exports NODE_AUTH_TOKEN from `token:` (defaulting
+      #      to github.token). npm publish then sends GITHUB_TOKEN as the
+      #      bearer credential and the registry returns 404. OIDC is never
+      #      tried because npm thinks it already has a credential.
+      #   2. The runner's bundled npm (10.9.x on Node 22) has no OIDC
+      #      support; the upgrade step above pins it to >= 11.5.1.
+      #
+      # Provenance is auto-attached by the registry on trusted-publisher
+      # publishes — no --provenance flag needed.
+      #
+      # Prerequisite: register the package as a trusted publisher at
+      # https://www.npmjs.com/package/gitnexus/access (Publishing access →
+      # Trusted Publishers → GitHub Actions):
+      #   Owner:       abhigyanpatwari
+      #   Repository:  GitNexus
+      #   Workflow:    publish.yml
+      #   Environment: (none)
+      - name: Publish to npm
+        shell: bash
+        working-directory: gitnexus
+        env:
+          NPM_TAG: ${{ needs.route.outputs.mode == 'rc' && 'rc' || 'latest' }}
+        run: npm publish --access public --tag "$NPM_TAG"
+
+      # ── Stable-only: pull CHANGELOG body if present ──────────────────────
+      - name: Extract release notes from CHANGELOG (stable)
        id: changelog
+        if: needs.route.outputs.mode == 'stable'
        shell: bash
        run: |
          VERSION="${GITHUB_REF#refs/tags/v}"
@@ -93,5 +809,90 @@ jobs:
      - name: Create GitHub Release
        uses: softprops/action-gh-release@b4309332981a82ec1c5618f44dd2e27cc8bfbfda # v2
        with:
-          body_path: ${{ steps.changelog.outputs.fallback == 'false' && '/tmp/release-notes.md' || '' }}
-          generate_release_notes: ${{ steps.changelog.outputs.fallback == 'true' }}
+          tag_name: ${{ steps.vtag-gate.outputs.vtag }}
+          name: >-
+            ${{ needs.route.outputs.mode == 'rc'
+                && format('Release Candidate {0}', steps.vtag-gate.outputs.vtag)
+                || steps.vtag-gate.outputs.vtag }}
+          prerelease: ${{ needs.route.outputs.mode == 'rc' }}
+          make_latest: ${{ needs.route.outputs.mode == 'stable' && 'true' || 'false' }}
+          # Stable: prefer CHANGELOG body, fall back to auto-generated.
+          # RC: always auto-generated + the prerelease body block below.
+          body_path: >-
+            ${{ needs.route.outputs.mode == 'stable' && steps.changelog.outputs.fallback == 'false'
+                && '/tmp/release-notes.md' || '' }}
+          generate_release_notes: >-
+            ${{ needs.route.outputs.mode == 'rc'
+                || steps.changelog.outputs.fallback == 'true' }}
+          body: >-
+            ${{ needs.route.outputs.mode == 'rc' && format(
+              'Automated release candidate build from `main`.{0}{0}**npm:** `npm install gitnexus@rc`{0}**Version:** `{1}`{0}**Target base:** `{2}` (rc #{3}){0}**Source commit (main):** {4}{0}**Release commit (versioned tree):** {5}{0}{0}Release candidates are pre-stable builds intended for early testing. Stable releases remain on the `latest` dist-tag.',
+              '\n',
+              steps.rc-version.outputs.rc_version,
+              steps.rc-version.outputs.base,
+              steps.rc-version.outputs.rc_n,
+              needs.rc-guard.outputs.head_sha,
+              steps.rc-tags.outputs.release_sha
+            ) || '' }}
+
+      # ── RC partial-failure cleanup ───────────────────────────────────────
+      # If anything after the atomic tag-push step failed (npm publish
+      # blew up, GitHub Release call timed out, etc.), the v-tag and
+      # rc/<SHA> marker are already on origin. External consumers
+      # (Renovate, Dependabot, Releases RSS) can ingest a phantom tag for
+      # a version that was never published to npm. This step deletes them
+      # automatically so the operator's recovery is just "redispatch with
+      # force=true on the next commit", not a manual ref cleanup.
+      #
+      # Scoped strictly to RC + real (non-dry-run) + the rc-tags step
+      # actually produced a vtag (otherwise nothing to clean up). The
+      # App token is still valid (~1h TTL, job timeout 20min).
+      - name: Cleanup pushed tags on partial failure
+        if: ${{ failure() && needs.route.outputs.mode == 'rc' && steps.rc-tags.outputs.vtag != '' }}
+        shell: bash
+        working-directory: gitnexus
+        env:
+          VTAG: ${{ steps.rc-tags.outputs.vtag }}
+          MARKER: ${{ steps.rc-tags.outputs.marker }}
+          PUSH_TOKEN: ${{ steps.app-token.outputs.token }}
+        run: |
+          set -uo pipefail
+          echo "::warning::Publish step failed after tag push. Cleaning up remote refs to prevent phantom-version ingestion by downstream consumers."
+
+          { set +x; } 2>/dev/null
+          auth_header="Authorization: Basic $(printf 'x-access-token:%s' "${PUSH_TOKEN}" | base64 -w0)"
+          echo "::add-mask::${auth_header}"
+          if [ "${ACTIONS_STEP_DEBUG:-false}" = "true" ]; then set -x; fi
+
+          # Delete v-tag and marker. Each delete is best-effort — if one
+          # is already absent (atomic push partially rejected, or earlier
+          # cleanup ran), the other still gets attempted.
+          for ref in "refs/tags/${VTAG}" "refs/tags/${MARKER}"; do
+            if git -c http.extraheader="${auth_header}" push origin --delete "${ref}" 2>&1; then
+              echo "deleted origin ${ref}"
+            else
+              echo "::warning::could not delete origin ${ref} — may already be absent or protected. Manual cleanup may be required."
+            fi
+          done
+
+          echo "::notice::Cleanup complete. To retry the release, redispatch the workflow with force=true on the same SHA, or push a new commit to main."
+
+  # ── Phase 5 (RC only): Docker images ───────────────────────────────────────
+  # R6: Docker remains RC-only. Stable Docker builds are explicitly deferred.
+  # Secrets are passed explicitly (not via `secrets: inherit`) so the
+  # callee's secret surface is auditable from the caller's source.
+  docker:
+    name: Build & Push RC Docker images
+    needs: [route, publish]
+    if: ${{ needs.route.outputs.mode == 'rc' && needs.publish.outputs.vtag != '' }}
+    uses: ./.github/workflows/docker.yml
+    secrets:
+      DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+      DOCKERHUB_TOKEN: ${{ secrets.DOCKERHUB_TOKEN }}
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+      attestations: write
+    with:
+      tag: ${{ needs.publish.outputs.vtag }}
@@ -1,392 +0,0 @@
-name: Release Candidate
-
-on:
-  # Publish a release-candidate build whenever a merge/commit lands on main.
-  # Docs/README-only changes are filtered out so prose updates don't
-  # cut a release.
-  push:
-    branches: [main]
-    paths-ignore:
-      - '**.md'
-      - 'docs/**'
-      - 'LICENSE'
-  workflow_dispatch:
-    inputs:
-      bump:
-        description: >-
-          Cycle policy. 'auto' (default) continues the active rc cycle on
-          this branch if there is one, otherwise bumps patch from latest.
-          Choose 'patch' / 'minor' / 'major' to explicitly start or reset
-          an rc cycle.
-        required: false
-        default: 'auto'
-        type: choice
-        options:
-          - auto
-          - patch
-          - minor
-          - major
-      force:
-        description: 'Publish even when HEAD already has an rc marker'
-        required: false
-        default: 'false'
-        type: choice
-        options:
-          - 'false'
-          - 'true'
-
-# No workflow-level permissions — scoped per job below.
-permissions: {}
-
-# Concurrency convention: see CONTRIBUTING.md → "GitHub Actions — Concurrency Convention".
-# Serialize all runs on the same ref (push + workflow_dispatch) to prevent two publishes
-# racing on the rc counter. cancel-in-progress: false — the earlier merge publishes first.
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: false
-
-jobs:
-  # ── Skip when HEAD already has an rc marker (retry / duplicate dispatch) ──
-  # The marker is a lightweight tag `rc/<HEAD_SHA>` pushed *before* `npm
-  # publish`, so a failed publish leaves the marker in place and the guard
-  # refuses to re-publish. Recovery path after a partial failure:
-  #   git push --delete origin rc/<HEAD_SHA> v<RC_VERSION>
-  # then redispatch with force=true.
-  guard:
-    name: Check if release candidate should run
-    runs-on: ubuntu-latest
-    timeout-minutes: 5
-    permissions:
-      contents: read
-    outputs:
-      should_run: ${{ steps.decide.outputs.should_run }}
-      head_sha: ${{ steps.decide.outputs.head_sha }}
-    steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-        with:
-          fetch-depth: 0
-          fetch-tags: true
-
-      - name: Decide
-        id: decide
-        shell: bash
-        env:
-          FORCE: ${{ inputs.force }}
-          BUMP_INPUT: ${{ inputs.bump }}
-          EVENT_NAME: ${{ github.event_name }}
-        run: |
-          set -euo pipefail
-          HEAD_SHA=$(git rev-parse HEAD)
-          echo "head_sha=$HEAD_SHA" >> "$GITHUB_OUTPUT"
-
-          if [ "$FORCE" = "true" ]; then
-            echo "Force flag set — running regardless of marker tag."
-            echo "should_run=true" >> "$GITHUB_OUTPUT"
-            exit 0
-          fi
-
-          # An explicit cycle reset on dispatch (bump != auto) also bypasses
-          # the dedup guard — the maintainer is deliberately asking for a
-          # new rc from the same commit.
-          if [ "$EVENT_NAME" = "workflow_dispatch" ] \
-             && [ -n "${BUMP_INPUT:-}" ] \
-             && [ "${BUMP_INPUT:-auto}" != "auto" ]; then
-            echo "Explicit bump=$BUMP_INPUT — bypassing marker dedup."
-            echo "should_run=true" >> "$GITHUB_OUTPUT"
-            exit 0
-          fi
-
-          # Dedup: is there already an rc/<HEAD_SHA> marker pointing at HEAD?
-          MARKER="rc/${HEAD_SHA}"
-          if git rev-parse "refs/tags/$MARKER" >/dev/null 2>&1; then
-            echo "HEAD already has marker $MARKER — skipping."
-            echo "should_run=false" >> "$GITHUB_OUTPUT"
-          else
-            echo "No marker on HEAD — proceeding."
-            echo "should_run=true" >> "$GITHUB_OUTPUT"
-          fi
-
-  # ── Reuse the stable CI workflow ─────────────────────────────────────
-  ci:
-    needs: guard
-    if: needs.guard.outputs.should_run == 'true'
-    uses: ./.github/workflows/ci.yml
-    permissions:
-      contents: read
-    secrets: inherit
-
-  # ── Publish the rc build to npm + create GitHub prerelease ───────────
-  publish:
-    name: Publish release candidate to npm
-    needs: [guard, ci]
-    if: needs.guard.outputs.should_run == 'true'
-    runs-on: ubuntu-latest
-    timeout-minutes: 20
-    permissions:
-      contents: write # push rc tag + marker
-      id-token: write # npm provenance
-    outputs:
-      vtag: ${{ steps.reltag.outputs.vtag }}
-    steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-        with:
-          fetch-depth: 0
-          fetch-tags: true
-
-      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
-        with:
-          node-version: 20
-          registry-url: https://registry.npmjs.org
-          cache: npm
-          cache-dependency-path: gitnexus/package-lock.json
-
-      - name: Build gitnexus-shared
-        run: npm install && npm run build
-        working-directory: gitnexus-shared
-
-      - name: Install gitnexus dependencies
-        run: npm ci
-        working-directory: gitnexus
-
-      - name: Resolve rc version
-        id: version
-        shell: bash
-        working-directory: gitnexus
-        env:
-          BUMP_INPUT: ${{ inputs.bump }}
-          EVENT_NAME: ${{ github.event_name }}
-          PKG_NAME: gitnexus
-        run: |
-          set -euo pipefail
-
-          # 1. Current published `latest` — the floor for any new rc base.
-          #    Only E404 ("never published") falls back to package.json; any
-          #    other error (network, auth, malformed response) fails fast.
-          NPM_STDERR_LATEST="$(mktemp)"
-          if CURRENT_LATEST="$(npm view "$PKG_NAME" version 2>"$NPM_STDERR_LATEST")"; then
-            :
-          else
-            if grep -q 'E404' "$NPM_STDERR_LATEST"; then
-              CURRENT_LATEST="$(node -p "require('./package.json').version")"
-              echo "Package not on registry (E404) — seeding from package.json: $CURRENT_LATEST"
-            else
-              echo "::error::npm registry unreachable for 'view version':" >&2
-              cat "$NPM_STDERR_LATEST" >&2
-              rm -f "$NPM_STDERR_LATEST"
-              exit 1
-            fi
-          fi
-          rm -f "$NPM_STDERR_LATEST"
-          CURRENT_LATEST_CLEAN="${CURRENT_LATEST%%-*}"
-
-          # 2. Full version list — needed for the counter and for active-cycle
-          #    inference. Same E404-only fallback.
-          NPM_STDERR_VERSIONS="$(mktemp)"
-          if VERSIONS_JSON="$(npm view "$PKG_NAME" versions --json 2>"$NPM_STDERR_VERSIONS")"; then
-            :
-          else
-            if grep -q 'E404' "$NPM_STDERR_VERSIONS"; then
-              VERSIONS_JSON='[]'
-              echo "No published versions for $PKG_NAME yet (E404)."
-            else
-              echo "::error::npm registry unreachable for 'view versions':" >&2
-              cat "$NPM_STDERR_VERSIONS" >&2
-              rm -f "$NPM_STDERR_VERSIONS"
-              exit 1
-            fi
-          fi
-          rm -f "$NPM_STDERR_VERSIONS"
-
-          # 3. Base selection.
-          #    - workflow_dispatch + bump ∈ {patch,minor,major} → explicit cycle
-          #      reset from latest.
-          #    - Everything else (push, or dispatch with bump=auto) → continue
-          #      the highest active rc base > latest if one exists; else
-          #      default to patch from latest.
-          if [ "$EVENT_NAME" = "workflow_dispatch" ] \
-             && [ -n "${BUMP_INPUT:-}" ] \
-             && [ "${BUMP_INPUT:-auto}" != "auto" ]; then
-            BASE="$(npx --yes -p semver@7 semver -i "$BUMP_INPUT" "$CURRENT_LATEST_CLEAN")"
-            echo "Explicit bump=$BUMP_INPUT → BASE=$BASE"
-          else
-            cat > /tmp/active_base.mjs <<'NODESCRIPT'
-          const latest = process.env.LATEST;
-          let v;
-          try { v = JSON.parse(process.env.VERSIONS_JSON); } catch { v = []; }
-          if (!Array.isArray(v)) v = [v];
-          const parse = s => s.split(".").map(n => parseInt(n, 10));
-          const gt = (a, b) => {
-            const [A, B] = [parse(a), parse(b)];
-            for (let i = 0; i < 3; i++) if (A[i] !== B[i]) return A[i] > B[i];
-            return false;
-          };
-          const bases = new Set();
-          for (const s of v) {
-            const m = /^(\d+\.\d+\.\d+)-rc\.\d+$/.exec(s);
-            if (m && gt(m[1], latest)) bases.add(m[1]);
-          }
-          if (!bases.size) { process.stdout.write(""); process.exit(0); }
-          const sorted = [...bases].sort((a, b) => gt(a, b) ? 1 : -1);
-          process.stdout.write(sorted[sorted.length - 1]);
-          NODESCRIPT
-            ACTIVE_BASE="$(LATEST="$CURRENT_LATEST_CLEAN" VERSIONS_JSON="$VERSIONS_JSON" node /tmp/active_base.mjs)"
-            if [ -n "$ACTIVE_BASE" ]; then
-              BASE="$ACTIVE_BASE"
-              echo "Continuing active rc cycle → BASE=$BASE"
-            else
-              BASE="$(npx --yes -p semver@7 semver -i patch "$CURRENT_LATEST_CLEAN")"
-              echo "No active rc cycle → patch bump from latest → BASE=$BASE"
-            fi
-          fi
-
-          # 4. Counter: 1 + max existing N for `${BASE}-rc.*`, else 1.
-          cat > /tmp/next_rc.mjs <<'NODESCRIPT'
-          const base = process.env.BASE;
-          const prefix = base + "-rc.";
-          let v;
-          try { v = JSON.parse(process.env.VERSIONS_JSON); } catch { v = []; }
-          if (!Array.isArray(v)) v = [v];
-          const ns = v
-            .filter(s => typeof s === "string" && s.startsWith(prefix))
-            .map(s => parseInt(s.slice(prefix.length), 10))
-            .filter(n => Number.isInteger(n) && n >= 0);
-          process.stdout.write(String(ns.length ? Math.max(...ns) + 1 : 1));
-          NODESCRIPT
-          NEXT_N="$(BASE="$BASE" VERSIONS_JSON="$VERSIONS_JSON" node /tmp/next_rc.mjs)"
-          RC_VERSION="${BASE}-rc.${NEXT_N}"
-          echo "Computed rc: $RC_VERSION"
-
-          # 5. Defensive: if the exact version already exists on the registry
-          #    (e.g., race with another run), abort before re-publishing.
-          #    Same E404-only pattern used above — a transient network
-          #    failure must fail loudly, not pretend the version is missing.
-          NPM_STDERR_EXISTS="$(mktemp)"
-          if npm view "$PKG_NAME@$RC_VERSION" version 2>"$NPM_STDERR_EXISTS" >/dev/null; then
-            rm -f "$NPM_STDERR_EXISTS"
-            echo "::error::Version $RC_VERSION already exists on npm — aborting."
-            exit 1
-          else
-            if grep -qiE 'E404|not found' "$NPM_STDERR_EXISTS"; then
-              rm -f "$NPM_STDERR_EXISTS"
-              # Version doesn't exist — safe to proceed.
-            else
-              echo "::error::npm registry unreachable for existence check:" >&2
-              cat "$NPM_STDERR_EXISTS" >&2
-              rm -f "$NPM_STDERR_EXISTS"
-              exit 1
-            fi
-          fi
-
-          echo "base=$BASE"             >> "$GITHUB_OUTPUT"
-          echo "rc_n=$NEXT_N"           >> "$GITHUB_OUTPUT"
-          echo "rc_version=$RC_VERSION" >> "$GITHUB_OUTPUT"
-
-      - name: Apply rc version in-CI
-        shell: bash
-        working-directory: gitnexus
-        run: |
-          set -euo pipefail
-          npm version "${{ steps.version.outputs.rc_version }}" \
-            --no-git-tag-version --allow-same-version
-
-      - name: Build gitnexus
-        run: npm run build
-        working-directory: gitnexus
-
-      - name: Dry-run publish
-        run: npm publish --dry-run --tag rc
-        working-directory: gitnexus
-
-      # ── Acquire the "rc lock" BEFORE publishing (fixes idempotency) ─────
-      # We create two tags and push them atomically:
-      #   v<RC_VERSION>      → annotated tag on a detached release commit
-      #                        whose tree contains the rewritten package.json
-      #                        (so the tag's source matches the npm tarball)
-      #   rc/<HEAD_SHA>      → lightweight tag on HEAD; the guard's dedup key
-      # If this push fails, nothing is published — safe.
-      # If this push succeeds but npm publish fails, the marker stays on
-      # the remote and blocks retries until an operator manually cleans up.
-      - name: Create and push rc tags
-        id: reltag
-        shell: bash
-        working-directory: gitnexus
-        env:
-          RC_VERSION: ${{ steps.version.outputs.rc_version }}
-          HEAD_SHA: ${{ needs.guard.outputs.head_sha }}
-        run: |
-          set -euo pipefail
-          VTAG="v${RC_VERSION}"
-          MARKER="rc/${HEAD_SHA}"
-          git config user.name  'github-actions[bot]'
-          git config user.email '41898282+github-actions[bot]@users.noreply.github.com'
-
-          # Detached release commit with the version bump — keeps `main`
-          # pristine but gives the v-tag a tree that matches the published
-          # package contents exactly (fixes release-integrity gap).
-          git add package.json package-lock.json 2>/dev/null || git add package.json
-          git commit -m "release: ${VTAG}" --allow-empty
-          RELEASE_SHA="$(git rev-parse HEAD)"
-          echo "Detached release commit: $RELEASE_SHA"
-
-          # Annotated release tag on the release commit.
-          git tag -a "$VTAG" "$RELEASE_SHA" -m "$VTAG"
-          # Lightweight marker on the user-visible HEAD for the guard.
-          git tag "$MARKER" "$HEAD_SHA"
-
-          # Atomic push of both refs. If either would clobber an existing
-          # remote ref, the push fails and we stop before npm publish.
-          git push --atomic origin "refs/tags/$VTAG" "refs/tags/$MARKER"
-
-          echo "vtag=$VTAG"     >> "$GITHUB_OUTPUT"
-          echo "marker=$MARKER" >> "$GITHUB_OUTPUT"
-          echo "release_sha=$RELEASE_SHA" >> "$GITHUB_OUTPUT"
-
-      - name: Publish to npm (rc dist-tag)
-        run: npm publish --provenance --access public --tag rc
-        working-directory: gitnexus
-        env:
-          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
-
-      - name: Create GitHub prerelease
-        uses: softprops/action-gh-release@b4309332981a82ec1c5618f44dd2e27cc8bfbfda # v2
-        with:
-          tag_name: ${{ steps.reltag.outputs.vtag }}
-          name: Release Candidate ${{ steps.reltag.outputs.vtag }}
-          prerelease: true
-          make_latest: 'false'
-          generate_release_notes: true
-          body: |
-            Automated release candidate build from `main`.
-
-            **npm:** `npm install gitnexus@rc`
-            **Version:** `${{ steps.version.outputs.rc_version }}`
-            **Target base:** `${{ steps.version.outputs.base }}` (rc #${{ steps.version.outputs.rc_n }})
-            **Source commit (main):** ${{ needs.guard.outputs.head_sha }}
-            **Release commit (versioned tree):** ${{ steps.reltag.outputs.release_sha }}
-
-            Release candidates are pre-stable builds intended for early testing.
-            Stable releases remain on the `latest` dist-tag.
-
-  # ── Build & push RC Docker images ────────────────────────────────────
-  # Calls docker.yml as a reusable workflow so that the build, signing, and
-  # attestation logic stays in one place. The publish job exposes `vtag`
-  # (e.g. `v1.2.3-rc.1`) as an output so we can pass it as the tag input.
-  # RC images are signed with Cosign keyless signing; the OIDC identity
-  # will be `docker.yml@refs/heads/main` (the caller's ref) rather than a
-  # tag ref — see README.md § Docker for the correct verify command for RCs.
-  docker:
-    name: Build & Push RC Docker images
-    needs: [guard, publish]
-    if: needs.guard.outputs.should_run == 'true' && needs.publish.outputs.vtag != ''
-    uses: ./.github/workflows/docker.yml
-    # Reusable workflows do not receive caller secrets unless inherited; without
-    # this, DOCKERHUB_* / GITHUB_TOKEN are empty in docker.yml → "Username and
-    # password required" on Docker Hub login (see same pattern on `ci:` above).
-    secrets: inherit
-    permissions:
-      contents: read
-      packages: write
-      id-token: write
-      attestations: write
-    with:
-      tag: ${{ needs.publish.outputs.vtag }}
@@ -0,0 +1,58 @@
+name: Scorecard
+
+# OpenSSF Scorecard supply-chain posture check. Runs weekly + on main push +
+# branch_protection_rule changes. SARIF uploads to the Security tab; the public
+# badge URL resolves once the first scheduled run lands (see README badge wiring).
+
+on:
+  branch_protection_rule:
+  schedule:
+    - cron: '0 7 * * 1'
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: false
+
+permissions: read-all
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    permissions:
+      # Needed to upload SARIF results to the Security tab.
+      security-events: write
+      # Needed for the publish_results badge flow (OIDC).
+      id-token: write
+      contents: read
+      actions: read
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Run Scorecard
+        uses: ossf/scorecard-action@4eaacf0543bb3f2c246792bd56e8cdeffafb205a # v2.4.3
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          # publish_results enables the public Scorecard badge.
+          publish_results: true
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 5
+
+      - name: Upload to Security tab
+        uses: github/codeql-action/upload-sarif@68bde559dea0fdcac2102bfdf6230c5f70eb485e # v4.35.4
+        with:
+          sarif_file: results.sarif
@@ -0,0 +1,82 @@
+name: Trivy Image Scan
+
+# Builds Dockerfile.cli and Dockerfile.web, then scans the resulting images
+# for OS-package and language-package CVEs at MEDIUM+ severity.
+# Findings upload to the Security tab; record-only (does not block merges).
+#
+# Trigger on Dockerfile changes in PRs so base-image/npm-layer remediation can
+# be verified before merge without running image scans on every PR.
+
+on:
+  pull_request:
+    paths:
+      - 'Dockerfile.cli'
+      - 'Dockerfile.web'
+      - 'gitnexus/Dockerfile.test'
+      - '.github/workflows/trivy.yml'
+  push:
+    branches: [main]
+  schedule:
+    - cron: '0 8 * * 1'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: false
+
+jobs:
+  scan:
+    name: Trivy (${{ matrix.image.name }})
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    permissions:
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        image:
+          - { dockerfile: Dockerfile.cli, name: gitnexus-cli }
+          - { dockerfile: Dockerfile.web, name: gitnexus-web }
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Setup Buildx
+        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0
+
+      - name: Build image (load locally for scan)
+        uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f # v7.1.0
+        with:
+          context: .
+          file: ${{ matrix.image.dockerfile }}
+          load: true
+          push: false
+          tags: scan-target:${{ matrix.image.name }}
+
+      # aquasecurity/trivy-action versions < 0.35.0 are flagged by
+      # GHSA-69fq-xp46-6x23 (briefly compromised supply chain). Pinned to
+      # v0.36.0 (post-incident clean release) by commit SHA.
+      - name: Run Trivy
+        uses: aquasecurity/trivy-action@ed142fd0673e97e23eac54620cfb913e5ce36c25 # v0.36.0
+        with:
+          image-ref: scan-target:${{ matrix.image.name }}
+          format: sarif
+          output: trivy-${{ matrix.image.name }}.sarif
+          severity: MEDIUM,HIGH,CRITICAL
+          # Hides CVEs with no available fix in the base image.
+          ignore-unfixed: true
+          exit-code: '0'
+
+      - name: Upload to Security tab
+        uses: github/codeql-action/upload-sarif@68bde559dea0fdcac2102bfdf6230c5f70eb485e # v4.35.4
+        with:
+          sarif_file: trivy-${{ matrix.image.name }}.sarif
+          category: trivy-${{ matrix.image.name }}
@@ -0,0 +1,85 @@
+name: Workflow Lint
+
+# Lints .github/workflows/** for both:
+#   - actionlint: YAML syntax, expression typing, shellcheck inside `run:`
+#     blocks, unknown contexts, deprecated runner labels.
+#   - zizmor: security misconfigurations — unpinned actions, dangerous
+#     `${{ }}` interpolation, missing per-job permissions, etc.
+#
+# Scoped to PRs that touch .github/** only — keeps off the typical PR
+# critical path.
+
+on:
+  pull_request:
+    branches: [main]
+    paths:
+      - '.github/**'
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  actionlint:
+    name: actionlint
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      # Pinned to v2.1.2. Verify SHA via:
+      #   gh api repos/raven-actions/actionlint/git/refs/tags/v2.1.2
+      # The action wraps the upstream `rhysd/actionlint` binary and emits
+      # GitHub-annotation-formatted findings on PRs.
+      - name: Run actionlint
+        uses: raven-actions/actionlint@205b530c5d9fa8f44ae9ed59f341a0db994aa6f8 # v2.1.2
+        with:
+          fail-on-error: true
+
+  zizmor:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    permissions:
+      contents: read
+      security-events: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Setup Python
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6
+        with:
+          python-version: '3.12'
+
+      - name: Install zizmor
+        # Pinned — resolves to whatever's latest on PyPI otherwise.
+        # Bump via Dependabot pip ecosystem (see .github/dependabot.yml).
+        run: pipx install zizmor==1.24.1
+
+      # Initial threshold: medium. High+ findings fail the job; medium findings
+      # appear in the Security tab without blocking. Tune after first run.
+      # Per-rule exemptions for pre-existing intentional patterns live in
+      # .github/zizmor.yml (each carries a documented mitigation).
+      - name: Run zizmor
+        run: zizmor --config .github/zizmor.yml --format sarif --min-severity medium . > zizmor.sarif
+        continue-on-error: true
+
+      - name: Upload SARIF
+        uses: github/codeql-action/upload-sarif@68bde559dea0fdcac2102bfdf6230c5f70eb485e # v4.35.4
+        with:
+          sarif_file: zizmor.sarif
+          category: zizmor
+
+      - name: Fail on high+ findings
+        run: zizmor --config .github/zizmor.yml --min-severity high .
@@ -0,0 +1,44 @@
+# zizmor config — pre-existing intentional patterns flagged on initial introduction.
+# Each ignore below has a documented mitigation. Re-evaluate when the source workflow changes.
+#
+# To run zizmor locally with this config:
+#   zizmor --config .github/zizmor.yml .
+
+rules:
+  dangerous-triggers:
+    ignore:
+      # workflow_run is REQUIRED to post sticky comments on fork PRs — the
+      # default-branch privileged token isn't accessible from `pull_request`
+      # on a fork. Mitigated by: read-only `actions:read` + `contents:read`
+      # for artifact download; `pull-requests:write` is the only write scope;
+      # no checkout of fork code occurs. Header comment in the file documents.
+      - ci-report.yml
+
+      # workflow_run is the trusted half of the autofix pipeline. The
+      # untrusted half (pr-autofix.yml) runs fork code with permissions:{}
+      # and produces only a diff artifact (data, not executable code). The
+      # publish job consumes the artifact, allowlist-validates every field
+      # of metadata.json before exporting to $GITHUB_OUTPUT, never checks
+      # out fork code, and never executes anything fork-controlled. Header
+      # comment in the file documents the split.
+      - pr-autofix-publish.yml
+
+      # pull_request_target needed by claude-code-action to access secrets
+      # and post review comments on fork PRs. Mitigated by: PR checkouts pin
+      # the fork's HEAD SHA (not the branch ref) to prevent TOCTOU races,
+      # and claude-code-action sandboxes execution. Header comment documents.
+      - claude.yml
+
+      # pull_request_target on the autolabel job needs `pull-requests:write`
+      # to apply labels. Mitigated by: release-drafter runs with `dry-run:
+      # true`, reads only `.github/release-drafter.yml` from the BASE ref,
+      # and the validate-title job (which runs untrusted `pull_request`
+      # context) holds no write permissions. Header comment documents.
+      - pr-labeler.yml
+
+  # Note: cache-poisoning is NOT exempted. The two prior findings in
+  # publish.yml and the former release-candidate.yml were fixed structurally
+  # by dropping `cache: npm` from those workflows (matches the pattern used
+  # by PyO3/maturin for the same audit). After the publish-workflow
+  # unification (issue #1609), only publish.yml remains; the same
+  # cache-poisoning hardening applies there.
@@ -68,8 +68,8 @@ gitnexus-web/test-results/
 eval/.coverage
 eval/.hypothesis/

-# Design docs (local only)
-docs/plans/
+# Local docs
+docs/

 gitnexus/test/fixtures/mini-repo/*.md
 gitnexus/test/fixtures/mini-repo/.claude
@@ -2,6 +2,7 @@ dist/
 coverage/
 gitnexus/vendor/
 gitnexus/test/fixtures/
+gitnexus-web/test/fixtures/
 gitnexus-web/playwright-report/
 gitnexus-web/test-results/
 *.d.ts
@@ -48,6 +48,7 @@ Commands and gotchas live under **Repo reference** below and in **[CONTRIBUTING.

 | Date | Version | Change |
 |------|---------|--------|
+| 2026-05-22 | 1.8.0 | Kotlin added to `MIGRATED_LANGUAGES` (registry-primary call resolution by default). Closes #1756 (companion-vs-instance dispatch) and #1757 (lambda scopes); refs #1746. RFC §6.4 corpus criterion waived (corpus-mode wiring is #927-scope); fixture criterion met. |
 | 2026-04-23 | 1.7.0 | TypeScript added to `MIGRATED_LANGUAGES` (registry-primary call resolution by default). |
 | 2026-04-20 | 1.6.0 | Added scope-resolution pipeline pointer (RFC #909 Ring 3); Python migrated to registry-primary. |
 | 2026-04-19 | 1.5.0 | Cross-repo impact (#794): `impact`/`query`/`context` accept `repo: "@<group>"` + `service`. Removed `group_query`/`group_contracts`/`group_status` MCP tools; added `gitnexus://group/{name}/contracts` and `gitnexus://group/{name}/status` resources. |
@@ -62,112 +63,64 @@ Commands and gotchas live under **Repo reference** below and in **[CONTRIBUTING.
 <!-- gitnexus:start -->
 # GitNexus — Code Intelligence

-Indexed as **GitNexus** (4325 symbols, 10556 relationships, 300 execution flows). Use MCP tools to understand code, assess impact, and navigate safely.
+This project is indexed by GitNexus as **GitNexus** (26675 symbols, 35395 relationships, 300 execution flows). Use the GitNexus MCP tools to understand code, assess impact, and navigate safely.

-> If any tool warns the index is stale, run `npx gitnexus analyze` first.
+> If any GitNexus tool warns the index is stale, run `npx gitnexus analyze` in terminal first.

 ## Always Do

- **MUST run impact analysis before editing any symbol.** `gitnexus_impact({target: "symbolName", direction: "upstream"})` — report blast radius to the user.
- **MUST run `gitnexus_detect_changes()` before committing** — verify only expected symbols and flows are affected.
- **MUST warn the user** if impact returns HIGH or CRITICAL risk.
- Explore unfamiliar code with `gitnexus_query({query: "concept"})` (process-grouped, ranked) instead of grepping.
- Full context on a symbol: `gitnexus_context({name: "symbolName"})`.
-
-## When Debugging
-
-1. `gitnexus_query({query: "<error or symptom>"})` — find related execution flows
-2. `gitnexus_context({name: "<suspect function>"})` — callers, callees, process participation
-3. `READ gitnexus://repo/GitNexus/process/{processName}` — trace flow step by step
-4. Regressions: `gitnexus_detect_changes({scope: "compare", base_ref: "main"})`
-
-## When Refactoring
-
- **Rename:** `gitnexus_rename({symbol_name: "old", new_name: "new", dry_run: true})` first. Graph edits are safe; text_search edits need manual review.
- **Extract/Split:** `gitnexus_context` (incoming/outgoing refs) then `gitnexus_impact` (upstream callers) before moving code.
- **After any refactor:** `gitnexus_detect_changes({scope: "all"})` to verify scope.
+- **MUST run impact analysis before editing any symbol.** Before modifying a function, class, or method, run `gitnexus_impact({target: "symbolName", direction: "upstream"})` and report the blast radius (direct callers, affected processes, risk level) to the user.
+- **MUST run `gitnexus_detect_changes()` before committing** to verify your changes only affect expected symbols and execution flows.
+- **MUST warn the user** if impact analysis returns HIGH or CRITICAL risk before proceeding with edits.
+- When exploring unfamiliar code, use `gitnexus_query({query: "concept"})` to find execution flows instead of grepping. It returns process-grouped results ranked by relevance.
+- When you need full context on a specific symbol — callers, callees, which execution flows it participates in — use `gitnexus_context({name: "symbolName"})`.

 ## Never Do

- Edit a symbol without running `gitnexus_impact` first.
- Ignore HIGH/CRITICAL risk warnings.
- Rename with find-and-replace — use `gitnexus_rename`.
- Commit without `gitnexus_detect_changes()`.
- Add language-specific behavior to shared ingestion code (`gitnexus/src/core/ingestion/`) — use a `LanguageProvider` hook. Seeing `provider.mroStrategy === 'xxx'` or an import from `languages/xxx.ts` in shared code means stop and add a hook.
-
-## Tools Quick Reference
-
-| Tool | When to use | Example |
-|------|-------------|---------|
-| `list_repos` | Discover indexed repos | `gitnexus_list_repos({})` |
-| `query` | Find code by concept | `gitnexus_query({query: "auth validation"})` |
-| `context` | 360-degree view of one symbol | `gitnexus_context({name: "validateUser"})` |
-| `impact` | Blast radius before editing | `gitnexus_impact({target: "X", direction: "upstream"})` |
-| `detect_changes` | Pre-commit scope check | `gitnexus_detect_changes({scope: "staged"})` |
-| `rename` | Safe multi-file rename | `gitnexus_rename({symbol_name: "old", new_name: "new", dry_run: true})` |
-| `cypher` | Custom graph queries | `gitnexus_cypher({query: "MATCH ..."})` |
-| `api_impact` | Pre-change API route impact | `gitnexus_api_impact({route: "/api/users", method: "GET"})` |
-| `route_map` | Route → handler → consumer map | `gitnexus_route_map({})` |
-| `tool_map` | MCP/RPC tool definitions | `gitnexus_tool_map({})` |
-| `shape_check` | Response shape vs consumer access | `gitnexus_shape_check({route: "/api/users"})` |
-| `group_list` | List repo groups | `gitnexus_group_list({})` |
-| `group_sync` | Rebuild group Contract Registry | `gitnexus_group_sync({name: "myGroup"})` |
-| `query` (group mode) | Cross-repo search in a group (RRF-merged) | `gitnexus_query({repo: "@myGroup", query: "auth"})` |
-| `context` (group mode) | 360° view across all member repos | `gitnexus_context({repo: "@myGroup", name: "validateUser"})` |
-| `impact` (group mode) | Cross-repo blast radius via Contract Bridge | `gitnexus_impact({repo: "@myGroup", target: "X", direction: "upstream"})` |
-
-> Group mode: pass `repo: "@<groupName>"` to fan out across all member repos, or `repo: "@<groupName>/<memberPath>"` to target a single member (path keys from `group.yaml`). Optional `service: "<monorepo/path>"` filters by service root. Group-level state (contracts, staleness) lives in the resources table below — there are **no** `group_query` / `group_context` / `group_impact` / `group_contracts` / `group_status` MCP tools.
->
-> For a full walkthrough of setting up a group across multiple repos that communicate over gRPC, see [docs/guides/microservices-grpc.md](docs/guides/microservices-grpc.md).
-
-## Impact Risk Levels
-
-| Depth | Meaning | Action |
-|-------|---------|--------|
-| d=1 | WILL BREAK — direct callers/importers | MUST update |
-| d=2 | LIKELY AFFECTED — indirect deps | Should test |
-| d=3 | MAY NEED TESTING — transitive | Test if critical path |
+- NEVER edit a function, class, or method without first running `gitnexus_impact` on it.
+- NEVER ignore HIGH or CRITICAL risk warnings from impact analysis.
+- NEVER rename symbols with find-and-replace — use `gitnexus_rename` which understands the call graph.
+- NEVER commit changes without running `gitnexus_detect_changes()` to check affected scope.

 ## Resources

 | Resource | Use for |
 |----------|---------|
-| `gitnexus://repo/GitNexus/context` | Codebase overview, index freshness |
+| `gitnexus://repo/GitNexus/context` | Codebase overview, check index freshness |
 | `gitnexus://repo/GitNexus/clusters` | All functional areas |
 | `gitnexus://repo/GitNexus/processes` | All execution flows |
 | `gitnexus://repo/GitNexus/process/{name}` | Step-by-step execution trace |
-| `gitnexus://group/{name}/contracts` | Group Contract Registry (provider/consumer rows + cross-links) |
-| `gitnexus://group/{name}/status` | Per-member index + Contract Registry staleness report |

-## Self-Check Before Finishing
+## CLI

-1. `gitnexus_impact` was run for all modified symbols
-2. No HIGH/CRITICAL warnings were ignored
-3. `gitnexus_detect_changes()` confirms expected scope
-4. All d=1 dependents were updated
-
-## Keeping the Index Fresh
-
-```bash
-npx gitnexus analyze                 # basic refresh; preserves any existing embeddings
-npx gitnexus analyze --embeddings    # also generate embeddings for new/changed nodes
-npx gitnexus analyze --drop-embeddings  # explicit opt-in to wipe existing embeddings
-```
-
-Check `.gitnexus/meta.json` `stats.embeddings` (0 = none). A plain `analyze` no longer drops existing vectors — pass `--drop-embeddings` to wipe.
-
-> Claude Code: PostToolUse hook detects a stale index after `git commit` and `git merge` and prompts the agent to run `analyze`. The hook does not invoke `analyze` itself.
-
-## CLI Skills
-
-| Task | Skill file |
-|------|-----------|
-| Architecture / "How does X work?" | `.claude/skills/gitnexus/gitnexus-exploring/SKILL.md` |
-| Blast radius / "What breaks?" | `.claude/skills/gitnexus/gitnexus-impact-analysis/SKILL.md` |
-| Debugging / "Why is X failing?" | `.claude/skills/gitnexus/gitnexus-debugging/SKILL.md` |
-| Refactoring | `.claude/skills/gitnexus/gitnexus-refactoring/SKILL.md` |
-| Tools/resources/schema reference | `.claude/skills/gitnexus/gitnexus-guide/SKILL.md` |
-| CLI commands (index, status, clean, wiki) | `.claude/skills/gitnexus/gitnexus-cli/SKILL.md` |
+| Task | Read this skill file |
+|------|---------------------|
+| Understand architecture / "How does X work?" | `.claude/skills/gitnexus/gitnexus-exploring/SKILL.md` |
+| Blast radius / "What breaks if I change X?" | `.claude/skills/gitnexus/gitnexus-impact-analysis/SKILL.md` |
+| Trace bugs / "Why is X failing?" | `.claude/skills/gitnexus/gitnexus-debugging/SKILL.md` |
+| Rename / extract / split / refactor | `.claude/skills/gitnexus/gitnexus-refactoring/SKILL.md` |
+| Tools, resources, schema reference | `.claude/skills/gitnexus/gitnexus-guide/SKILL.md` |
+| Index, status, clean, wiki CLI commands | `.claude/skills/gitnexus/gitnexus-cli/SKILL.md` |
+| Work in the Ingestion area (239 symbols) | `.claude/skills/generated/ingestion/SKILL.md` |
+| Work in the Extractors area (135 symbols) | `.claude/skills/generated/extractors/SKILL.md` |
+| Work in the Components area (112 symbols) | `.claude/skills/generated/components/SKILL.md` |
+| Work in the Lbug area (96 symbols) | `.claude/skills/generated/lbug/SKILL.md` |
+| Work in the Group area (94 symbols) | `.claude/skills/generated/group/SKILL.md` |
+| Work in the Cli area (92 symbols) | `.claude/skills/generated/cli/SKILL.md` |
+| Work in the Configs area (92 symbols) | `.claude/skills/generated/configs/SKILL.md` |
+| Work in the Type-extractors area (90 symbols) | `.claude/skills/generated/type-extractors/SKILL.md` |
+| Work in the Hooks area (88 symbols) | `.claude/skills/generated/hooks/SKILL.md` |
+| Work in the Unit area (80 symbols) | `.claude/skills/generated/unit/SKILL.md` |
+| Work in the Cpp area (73 symbols) | `.claude/skills/generated/cpp/SKILL.md` |
+| Work in the Scope-resolution area (72 symbols) | `.claude/skills/generated/scope-resolution/SKILL.md` |
+| Work in the Server area (66 symbols) | `.claude/skills/generated/server/SKILL.md` |
+| Work in the Local area (61 symbols) | `.claude/skills/generated/local/SKILL.md` |
+| Work in the Wiki area (60 symbols) | `.claude/skills/generated/wiki/SKILL.md` |
+| Work in the Workers area (57 symbols) | `.claude/skills/generated/workers/SKILL.md` |
+| Work in the Embeddings area (56 symbols) | `.claude/skills/generated/embeddings/SKILL.md` |
+| Work in the Typescript area (53 symbols) | `.claude/skills/generated/typescript/SKILL.md` |
+| Work in the Storage area (51 symbols) | `.claude/skills/generated/storage/SKILL.md` |
+| Work in the Php area (48 symbols) | `.claude/skills/generated/php/SKILL.md` |

 <!-- gitnexus:end -->

@@ -52,3 +52,67 @@ If always-on instructions grow, load deep conventions via conditional reads (e.g
 ## GitNexus rules

 See the `<!-- gitnexus:start --> … <!-- gitnexus:end -->` block in **[AGENTS.md](AGENTS.md)** for the canonical MCP tools, impact analysis rules, and index instructions.
+
+<!-- gitnexus:start -->
+# GitNexus — Code Intelligence
+
+This project is indexed by GitNexus as **GitNexus** (26675 symbols, 35395 relationships, 300 execution flows). Use the GitNexus MCP tools to understand code, assess impact, and navigate safely.
+
+> If any GitNexus tool warns the index is stale, run `npx gitnexus analyze` in terminal first.
+
+## Always Do
+
+- **MUST run impact analysis before editing any symbol.** Before modifying a function, class, or method, run `gitnexus_impact({target: "symbolName", direction: "upstream"})` and report the blast radius (direct callers, affected processes, risk level) to the user.
+- **MUST run `gitnexus_detect_changes()` before committing** to verify your changes only affect expected symbols and execution flows.
+- **MUST warn the user** if impact analysis returns HIGH or CRITICAL risk before proceeding with edits.
+- When exploring unfamiliar code, use `gitnexus_query({query: "concept"})` to find execution flows instead of grepping. It returns process-grouped results ranked by relevance.
+- When you need full context on a specific symbol — callers, callees, which execution flows it participates in — use `gitnexus_context({name: "symbolName"})`.
+
+## Never Do
+
+- NEVER edit a function, class, or method without first running `gitnexus_impact` on it.
+- NEVER ignore HIGH or CRITICAL risk warnings from impact analysis.
+- NEVER rename symbols with find-and-replace — use `gitnexus_rename` which understands the call graph.
+- NEVER commit changes without running `gitnexus_detect_changes()` to check affected scope.
+
+## Resources
+
+| Resource | Use for |
+|----------|---------|
+| `gitnexus://repo/GitNexus/context` | Codebase overview, check index freshness |
+| `gitnexus://repo/GitNexus/clusters` | All functional areas |
+| `gitnexus://repo/GitNexus/processes` | All execution flows |
+| `gitnexus://repo/GitNexus/process/{name}` | Step-by-step execution trace |
+
+## CLI
+
+| Task | Read this skill file |
+|------|---------------------|
+| Understand architecture / "How does X work?" | `.claude/skills/gitnexus/gitnexus-exploring/SKILL.md` |
+| Blast radius / "What breaks if I change X?" | `.claude/skills/gitnexus/gitnexus-impact-analysis/SKILL.md` |
+| Trace bugs / "Why is X failing?" | `.claude/skills/gitnexus/gitnexus-debugging/SKILL.md` |
+| Rename / extract / split / refactor | `.claude/skills/gitnexus/gitnexus-refactoring/SKILL.md` |
+| Tools, resources, schema reference | `.claude/skills/gitnexus/gitnexus-guide/SKILL.md` |
+| Index, status, clean, wiki CLI commands | `.claude/skills/gitnexus/gitnexus-cli/SKILL.md` |
+| Work in the Ingestion area (239 symbols) | `.claude/skills/generated/ingestion/SKILL.md` |
+| Work in the Extractors area (135 symbols) | `.claude/skills/generated/extractors/SKILL.md` |
+| Work in the Components area (112 symbols) | `.claude/skills/generated/components/SKILL.md` |
+| Work in the Lbug area (96 symbols) | `.claude/skills/generated/lbug/SKILL.md` |
+| Work in the Group area (94 symbols) | `.claude/skills/generated/group/SKILL.md` |
+| Work in the Cli area (92 symbols) | `.claude/skills/generated/cli/SKILL.md` |
+| Work in the Configs area (92 symbols) | `.claude/skills/generated/configs/SKILL.md` |
+| Work in the Type-extractors area (90 symbols) | `.claude/skills/generated/type-extractors/SKILL.md` |
+| Work in the Hooks area (88 symbols) | `.claude/skills/generated/hooks/SKILL.md` |
+| Work in the Unit area (80 symbols) | `.claude/skills/generated/unit/SKILL.md` |
+| Work in the Cpp area (73 symbols) | `.claude/skills/generated/cpp/SKILL.md` |
+| Work in the Scope-resolution area (72 symbols) | `.claude/skills/generated/scope-resolution/SKILL.md` |
+| Work in the Server area (66 symbols) | `.claude/skills/generated/server/SKILL.md` |
+| Work in the Local area (61 symbols) | `.claude/skills/generated/local/SKILL.md` |
+| Work in the Wiki area (60 symbols) | `.claude/skills/generated/wiki/SKILL.md` |
+| Work in the Workers area (57 symbols) | `.claude/skills/generated/workers/SKILL.md` |
+| Work in the Embeddings area (56 symbols) | `.claude/skills/generated/embeddings/SKILL.md` |
+| Work in the Typescript area (53 symbols) | `.claude/skills/generated/typescript/SKILL.md` |
+| Work in the Storage area (51 symbols) | `.claude/skills/generated/storage/SKILL.md` |
+| Work in the Php area (48 symbols) | `.claude/skills/generated/php/SKILL.md` |
+
+<!-- gitnexus:end -->
@@ -30,17 +30,17 @@ Format: `<type>[(scope)][!]: <subject>`

 Allowed types and the release-notes section each one lands in (defined in `.github/release.yml`):

-| Type | Label applied | Release-notes section |
-|------|---------------|-----------------------|
-| `feat` | `enhancement` | 🚀 Features |
-| `fix` | `bug` | 🐛 Bug Fixes |
-| `perf` | `performance` | 🏎️ Performance |
-| `refactor` | `refactor` | 🔄 Refactoring |
-| `test` | `test` | 🧪 Tests |
-| `ci` | `ci` | 👷 CI/CD |
-| `build` / `deps` | `dependencies` | 📦 Dependencies |
-| `docs` | `documentation` | (grouped under Other Changes unless a Docs section is added) |
-| `chore` / `revert` | `chore` | (excluded from release notes) |
+| Type               | Label applied   | Release-notes section                                        |
+| ------------------ | --------------- | ------------------------------------------------------------ |
+| `feat`             | `enhancement`   | 🚀 Features                                                  |
+| `fix`              | `bug`           | 🐛 Bug Fixes                                                 |
+| `perf`             | `performance`   | 🏎️ Performance                                               |
+| `refactor`         | `refactor`      | 🔄 Refactoring                                               |
+| `test`             | `test`          | 🧪 Tests                                                     |
+| `ci`               | `ci`            | 👷 CI/CD                                                     |
+| `build` / `deps`   | `dependencies`  | 📦 Dependencies                                              |
+| `docs`             | `documentation` | (grouped under Other Changes unless a Docs section is added) |
+| `chore` / `revert` | `chore`         | (excluded from release notes)                                |

 Append `!` to the type (e.g. `feat(api)!: drop /v1 endpoint`) or include `BREAKING CHANGE:` in the PR body to flag a breaking change — the labeler then adds the `breaking` label and the 💥 Breaking Changes section is rendered first.

@@ -81,17 +81,17 @@ Every workflow under `.github/workflows/` MUST declare a top-level `concurrency:
  - **Merge queue (`merge_group`)**: when this event is added, use `${{ github.workflow }}-${{ github.event.merge_group.head_ref }}` with `cancel-in-progress: false` (every queue entry is a distinct ref; never cancel).
 - **`cancel-in-progress` policy:**

-  | Event | `cancel-in-progress` | Why |
-  |-------|----------------------|-----|
-  | `pull_request` CI run | `true` | New push supersedes old run |
-  | `push` to `main` | `false` | Every main commit gets validated |
-  | Tag push (`v*` publish) | `false` | Never cancel mid-publish |
-  | `push` to `main` for release-candidate | `false` | Never cancel mid-RC publish |
-  | `workflow_dispatch` (release/publish) | `false` | Manual runs are intentional |
-  | `workflow_run` (sticky-comment reports) | `false` | Serialize, don't race |
-  | Per-PR bot workflows (`@claude`, review) | `false` | Serialize comments per PR |
-  | PR-meta re-checks (pr-description-check) | `true` | Cheap, latest wins |
-  | Single-slot utilities (triage sweep) | `true` | Latest dispatch supersedes |
+  | Event                                    | `cancel-in-progress` | Why                              |
+  | ---------------------------------------- | -------------------- | -------------------------------- |
+  | `pull_request` CI run                    | `true`               | New push supersedes old run      |
+  | `push` to `main`                         | `false`              | Every main commit gets validated |
+  | Tag push (`v*` publish)                  | `false`              | Never cancel mid-publish         |
+  | `push` to `main` for release-candidate   | `false`              | Never cancel mid-RC publish      |
+  | `workflow_dispatch` (release/publish)    | `false`              | Manual runs are intentional      |
+  | `workflow_run` (sticky-comment reports)  | `false`              | Serialize, don't race            |
+  | Per-PR bot workflows (`@claude`, review) | `false`              | Serialize comments per PR        |
+  | PR-meta re-checks (pr-description-check) | `true`               | Cheap, latest wins               |
+  | Single-slot utilities (triage sweep)     | `true`               | Latest dispatch supersedes       |

 - For workflows that serve multiple events at once (e.g. `ci.yml` handles `pull_request`, `push`, and `workflow_call`), make `cancel-in-progress` event-aware:

@@ -103,22 +103,59 @@ Every workflow under `.github/workflows/` MUST declare a top-level `concurrency:

 - When adding a new workflow, copy the concurrency block from an existing workflow of the same event shape.

+## CI automation contracts
+
+Two workflows produce machine-readable signals on every PR. Coding agents and humans alike can rely on the names and shapes below — change them with intent.
+
+### `gitnexus/autofix`
+
+`pr-autofix.yml` (untrusted) + `pr-autofix-publish.yml` (trusted) run `prettier --write` and `eslint --fix` against the PR head and surface a single ChatOps button on the PR. Three signals are emitted:
+
+| Surface           | Where                                                                                                                                                                                                                                                                                                   | Notes                                                                  |
+| ----------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------- |
+| Sticky PR comment | Top-level comment with the HTML marker `<!-- gitnexus:pr-autofix-summary -->` and heading `## :sparkles: PR Autofix`. Only posted when there is something to fix; clean PRs stay silent.                                                                                                                | Edit-in-place via marker; one comment per PR.                          |
+| Fenced JSON block | Inside the sticky, fenced as `gitnexus-autofix`. Schema `gitnexus.pr-autofix/v2` with fields `state` (`fixes-available`), `pr_number`, `head_sha`, `changed_lines`, `run_id`, and `apply_command` (literal `/autofix`). | Parseable signal — preferred over regexing prose. v1 fields preserved as a superset. |
+| Check Run         | Stable name `gitnexus/autofix` on the PR head SHA. Conclusion: `success` (clean) or `neutral` (`fixes-available`). The neutral title is `Autofix available — comment /autofix to apply`.                                                                                                                | Surfaced under PR Checks; readable via `gh pr checks <pr>`.            |
+
+To detect outcome from an agent: `gh pr checks <pr> --json name,conclusion,output | jq '.[] | select(.name == "gitnexus/autofix")'`.
+
+Forks are supported. The untrusted half runs fork code with `permissions: {}` and ships the diff as an artifact; the trusted publish job consumes only the diff (data, not code) and posts the comment + check run.
+
+#### Applying autofix
+
+Comment `/autofix` on the PR (whole-line, no arguments). The `pr-autofix-apply.yml` workflow:
+
+1. Validates the comment body matches `^/autofix\s*$` exactly. Quoted or inline mentions are silently ignored.
+2. Validates the commenter has `admin`, `write`, or `maintain` permission on the repo, OR is the PR author. Other commenters get a 👎 reaction and a refusal reply.
+3. Locates the most recent successful `pr-autofix.yml` run for the PR's current head SHA, downloads its `autofix` artifact, applies the patch, and pushes a `chore(autofix): ...` commit back to the PR head branch.
+4. Reacts ✅ on success, 👎 on stale-patch / push-failure, and posts a short reply with the apply-run URL in either case.
+
+The apply workflow runs from the default branch's copy of the file regardless of where the comment originates — that's the trust anchor. There is no diff-size cap (the apply workflow uses `git apply` + push, not the GitHub review-comment API).
+
+For fork PRs, the push succeeds only when the contributor has **Allow edits by maintainers** enabled on the PR (the default). When they have disabled it, the workflow fails loud with a 👎 reaction and an explanation comment.
+
+Re-invoking `/autofix` after a successful apply is a safe no-op — the workflow detects the already-applied state via `git apply --check --reverse` and reacts ✅ without pushing.
+
+**Sensitive paths.** The apply workflow refuses any patch that touches `.github/` (workflow files, CODEOWNERS, dependabot config). A malicious PR could ship a custom prettier or ESLint config that reformats workflow YAML; if accepted, those edits would be pushed under `contents: write` without human review. Apply formatter changes to files under `.github/` manually in a normal commit so they get the same review every other workflow change gets.
+
 ## AI-assisted contributions

 If you use coding agents, follow project context files (e.g. `AGENTS.md`, `CLAUDE.md`) and avoid drive-by refactors unrelated to the issue. Prefer incremental, test-backed changes.

 ## Releases

-Two publish workflows ship `gitnexus` to npm:
+One workflow ships `gitnexus` to npm — `.github/workflows/publish.yml`. It
+routes between two modes based on the triggering event:

- **Stable** (`.github/workflows/publish.yml`) — triggered by pushing any `v*`
-  tag. Publishes to the `latest` dist-tag with a changelog-backed GitHub
-  release. Maintainers are expected to tag from `main` as a convention; the
-  workflow itself does not enforce branch reachability.
- **Release Candidate** (`.github/workflows/release-candidate.yml`) — runs on
-  every push to `main` (typically a merged PR) plus manual dispatch. Docs-only
-  changes are skipped via `paths-ignore`. Publishes to the `rc` dist-tag with
-  version `X.Y.Z-rc.N` and a GitHub prerelease, where:
+- **Stable mode** — triggered by pushing any `v<X.Y.Z>` tag (no `-rc.*`
+  suffix; RC tags are excluded at trigger via a negative glob). Publishes to
+  the `latest` dist-tag with a changelog-backed GitHub release. Maintainers
+  are expected to tag from `main` as a convention; the workflow itself does
+  not enforce branch reachability. No Docker build (RC-only).
+- **Release-candidate mode** — runs on every push to `main` (typically a
+  merged PR) plus manual `workflow_dispatch`. Docs-only changes are skipped
+  via `paths-ignore`. Publishes to the `rc` dist-tag with version
+  `X.Y.Z-rc.N` and a GitHub prerelease, where:
  - `X.Y.Z` is selected automatically. On push (and on dispatch with
    `bump: auto`, the default) the workflow **continues the active rc cycle**:
    if the registry already has `X.Y.Z-rc.*` versions with `X.Y.Z` > current
@@ -135,37 +172,64 @@ Two publish workflows ship `gitnexus` to npm:
    caller's ref — see README.md § Docker for the verify command).

  Idempotency: the workflow pushes an `rc/<HEAD_SHA>` marker tag and a
-  `v<RC>` release tag **atomically, before** calling `npm publish`. The guard
-  refuses to re-run once the marker exists, so a post-publish failure will
-  not mint a duplicate rc for the same commit. The `v<RC>` tag points at a
-  detached release commit whose `package.json` matches the npm tarball
-  exactly (traceable releases). Recovery after a partial failure:
+  `v<RC>` release tag **atomically, before** calling `npm publish`. The
+  RC guard refuses to re-run once the marker exists, so a post-publish
+  failure will not mint a duplicate rc for the same commit. The `v<RC>`
+  tag points at a detached release commit whose `package.json` matches
+  the npm tarball exactly (traceable releases). The RC tag is excluded
+  from this workflow's `push: tags:` filter, so it does **not** re-trigger
+  publishing — preventing the double-publish failure mode tracked in #1609.
+  Recovery after a partial failure: the workflow's `if: failure()` cleanup
+  step in the `publish` job auto-deletes the v-tag and marker on most
+  post-publish failures, so the typical retry is just:
+
+  ```bash
+  gh workflow run publish.yml --ref main -f force=true
+  # or push a new commit to main, which will cut a fresh RC
+  ```
+
+  If auto-cleanup didn't run (e.g. the cleanup step itself failed, or the
+  failure happened in the route/rc-guard phase before the marker was
+  pushed), manual cleanup is:

  ```bash
  git push --delete origin rc/<HEAD_SHA> v<RC>
-  # then redispatch the workflow with force: true
+  # then redispatch with force: true
  ```

+  **Release-PR-skip subject pattern.** The rc-guard job recognizes a
+  squash-merged release commit by matching the commit subject against
+  `^chore: release vX.Y.Z` (optionally followed by ` (#NNNN)` for the
+  squash-merge PR-number suffix). Match is case-insensitive — `Chore: Release v1.2.3`
+  works too. PRs that should suppress the RC build must either use this
+  subject shape, or carry the `release` label so the label-based fallback
+  fires. Other release-style subjects (`chore(release): v1.2.3`,
+  `release: v1.2.3`) will NOT trigger the skip — please name the release
+  PR exactly `chore: release vX.Y.Z` to keep the dedup deterministic.
+
  **Docker-only partial failure:** if `publish` succeeds (npm tarball + tags
  are live) but the `docker` job subsequently fails (e.g. GHCR flakiness),
  the npm RC is already published and the `rc/<HEAD_SHA>` marker is in place.
-  Re-running `release-candidate.yml` with `force: true` will abort at the
-  "Version already exists on npm" guard. To recover without cutting a new RC:
+  Recovery without cutting a new RC:

  ```bash
-  # 1. Manually trigger only the docker workflow, passing the existing RC tag:
-  gh workflow run docker.yml --ref main -f tag=v<RC_VERSION>
-  # (requires a workflow_dispatch trigger on docker.yml — see note below)
+  # Re-run only the failed docker job from the original workflow run:
+  gh run rerun <run-id> --failed
  ```

-  Because `docker.yml` intentionally has no `workflow_dispatch` (images are
-  tag-driven by design), the practical recovery options are:
-  - Wait for the next commit on `main`, which will cut a new RC that includes
-    the Docker build.
-  - Manually run `docker build` + `docker push` locally and sign with Cosign
-    against the same digest.
-  - Delete `rc/<HEAD_SHA>` and `v<RC>` tags, then redispatch with `force:
-    true` to re-run the full RC pipeline (cuts a new RC number).
+  Find the run ID via `gh run list --workflow=publish.yml --branch main`.
+  `docker.yml` intentionally has no `workflow_dispatch` trigger (images are
+  tag-driven by design), so the gh-run-rerun path is the supported recovery.
+
+  **GitHub Release transient failure** (npm publish succeeded, Release step
+  failed): the npm artifact is live but no GitHub Release page exists.
+  Recover by either re-running the failed job (`gh run rerun <run-id> --failed`),
+  or creating the Release manually:
+
+  ```bash
+  gh release create v<RC> --prerelease --generate-notes        # RC
+  gh release create v<X.Y.Z> --notes-file gitnexus/CHANGELOG.md # stable
+  ```

 The rc workflow never moves `latest`. To verify after a change, inspect dist-tags:

@@ -1,24 +1,32 @@
 ARG BUILDPLATFORM
 ARG TARGETPLATFORM
+# Pinned npm version used to replace the bundled npm in the upstream Node
+# image. Bumping requires a coordinated update in Dockerfile.web and
+# gitnexus/Dockerfile.test so all images bootstrap the same npm.
+ARG NPM_VERSION=11.14.1

-# ── Builder ────────────────────────────────────────────────────────────
+# -- Builder -----------------------------------------------------------
 # Native modules (tree-sitter-*, onnxruntime-node, node-gyp builds for
 # tree-sitter-proto / tree-sitter-swift) require python3 + a C/C++ toolchain.
-FROM node:22-trixie-slim AS builder
+# node:22-bookworm-slim
+FROM node:22-bookworm-slim@sha256:9f6d5975c7dca860947d3915877f85607946403fc55349f39b4bc3688448bb6e AS builder
+ARG NPM_VERSION

 WORKDIR /app

+RUN npx --yes npm@${NPM_VERSION} install -g npm@${NPM_VERSION}
+
 # Toolchain for node-gyp / native builds.
 RUN apt-get update && apt-get install -y --no-install-recommends python3 make g++ git && rm -rf /var/lib/apt/lists/*

-# Build gitnexus-shared first — gitnexus depends on it as a workspace.
+# Build gitnexus-shared first - gitnexus depends on it as a workspace.
 COPY gitnexus-shared/package.json gitnexus-shared/package-lock.json ./gitnexus-shared/
 RUN npm ci --prefix gitnexus-shared
 COPY gitnexus-shared ./gitnexus-shared
 RUN rm -f gitnexus-shared/tsconfig.tsbuildinfo
 RUN npm run build --prefix gitnexus-shared

-# Copy the full gitnexus package before installing — `npm ci` triggers
+# Copy the full gitnexus package before installing - `npm ci` triggers
 # `postinstall` (patches tree-sitter-swift, builds the vendored
 # tree-sitter-proto) and `prepare` (compiles TypeScript via scripts/build.js),
 # both of which need the source tree.
@@ -28,11 +36,15 @@ RUN npm ci --prefix gitnexus
 # Drop dev dependencies for a smaller runtime layer.
 RUN npm prune --omit=dev --prefix gitnexus

-# ── Runtime ────────────────────────────────────────────────────────────
-FROM node:22-trixie-slim AS runtime
+# -- Runtime -----------------------------------------------------------
+# node:22-bookworm-slim
+FROM node:22-bookworm-slim@sha256:9f6d5975c7dca860947d3915877f85607946403fc55349f39b4bc3688448bb6e AS runtime

-# curl for the healthcheck; git so `gitnexus` can clone repos at runtime.
-RUN apt-get update && apt-get install -y --no-install-recommends curl git && rm -rf /var/lib/apt/lists/*
+# curl for the healthcheck; git for cloning; ca-certificates for TLS verification.
+RUN apt-get update && apt-get install -y --no-install-recommends curl git ca-certificates && rm -rf /var/lib/apt/lists/* \
+    && rm -rf /usr/local/lib/node_modules/npm \
+    && rm -rf /usr/local/lib/node_modules/corepack \
+    && rm -f /usr/local/bin/npm /usr/local/bin/npx /usr/local/bin/corepack

 WORKDIR /app

@@ -43,11 +55,21 @@ RUN mkdir -p /data/gitnexus && chown -R node:node /data
 COPY --from=builder --chown=node:node /app/gitnexus/dist ./gitnexus/dist
 COPY --from=builder --chown=node:node /app/gitnexus/node_modules ./gitnexus/node_modules
 COPY --from=builder --chown=node:node /app/gitnexus/package.json ./gitnexus/package.json
+COPY --from=builder --chown=node:node /app/gitnexus/scripts/install-duckdb-extension.mjs ./gitnexus/scripts/install-duckdb-extension.mjs
 COPY --from=builder --chown=node:node /app/gitnexus/vendor ./gitnexus/vendor

+# Expose the `gitnexus` binary on PATH so the documented Docker workflow
+# (`docker compose exec gitnexus-server gitnexus index /workspace/<repo>`)
+# works without users having to invoke `node /app/gitnexus/dist/cli/index.js`.
+# `npm prune --omit=dev` in the builder stage strips `node_modules/.bin/`
+# entries, so the `gitnexus` bin declared in package.json (`dist/cli/index.js`,
+# which already carries `#!/usr/bin/env node` and 755 perms) is otherwise
+# unreachable from $PATH.
+RUN ln -s /app/gitnexus/dist/cli/index.js /usr/local/bin/gitnexus
+
 USER node

-# The web UI defaults to http://localhost:4747 — keep that contract.
+# The web UI defaults to http://localhost:4747 - keep that contract.
 ENV GITNEXUS_HOME=/data/gitnexus \
    NODE_ENV=production \
    PORT=4747
@@ -1,10 +1,17 @@
 ARG BUILDPLATFORM
 ARG TARGETPLATFORM
+# Pinned npm version — keep in sync with Dockerfile.cli and
+# gitnexus/Dockerfile.test.
+ARG NPM_VERSION=11.14.1

-FROM --platform=$BUILDPLATFORM node:22-alpine AS builder
+# node:22-bookworm-slim
+FROM --platform=$BUILDPLATFORM node:22-bookworm-slim@sha256:9f6d5975c7dca860947d3915877f85607946403fc55349f39b4bc3688448bb6e AS builder
+ARG NPM_VERSION

 WORKDIR /app

+RUN npx --yes npm@${NPM_VERSION} install -g npm@${NPM_VERSION}
+
 COPY gitnexus-shared/package.json gitnexus-shared/package-lock.json ./gitnexus-shared/
 RUN npm ci --prefix gitnexus-shared

@@ -19,9 +26,13 @@ RUN npm ci --prefix gitnexus-web
 COPY gitnexus-web ./gitnexus-web
 RUN npm run build --prefix gitnexus-web

-FROM node:22-alpine AS runtime
+# node:22-bookworm-slim
+FROM node:22-bookworm-slim@sha256:9f6d5975c7dca860947d3915877f85607946403fc55349f39b4bc3688448bb6e AS runtime

-RUN apk add --no-cache curl
+RUN apt-get update && apt-get install -y --no-install-recommends curl && rm -rf /var/lib/apt/lists/* \
+    && rm -rf /usr/local/lib/node_modules/npm \
+    && rm -rf /usr/local/lib/node_modules/corepack \
+    && rm -f /usr/local/bin/npm /usr/local/bin/npx /usr/local/bin/corepack

 WORKDIR /app

@@ -30,9 +30,15 @@ Format: **Trigger → Instruction → Reason**. Append new Signs when the same m
 ### Stale graph after edits

 - **Trigger:** MCP warns index is behind `HEAD`, or search doesn't match latest commit.
- **Do:** `npx gitnexus analyze` (plus `--embeddings` if used).
+- **Do:** `npx gitnexus analyze` (plus `--embeddings` if used). Runs incrementally by default — the pipeline parses every file every run (cross-file resolution requires it), but tree-sitter dispatch is skipped for unchanged file chunks via the content-addressed cache, and only changed-file rows (plus their importers, transitively) are rewritten in LadybugDB.
 - **Why:** Tools query LadybugDB from last analyze; git changes are invisible until re-indexed.

+### Index seems corrupt or "incremental" is misbehaving
+
+- **Trigger:** `analyze` produces unexpected results, or `meta.json.incrementalInProgress` is set, or the index is in a half-state after a crash.
+- **Do:** `npx gitnexus analyze --force` to rebuild from scratch. The dirty-flag check forces this automatically when a previous incremental run didn't complete cleanly, but `--force` is the manual escape hatch. Safe to delete the `.gitnexus/parse-cache/` directory (and any legacy `.gitnexus/parse-cache.json`) at any time — content-addressed, will be regenerated.
+- **Why:** Incremental writeback is selective DB row replacement; if the on-disk state is inconsistent for any reason, a full rebuild is the cheapest path back to a known-good index.
+
 ### Embeddings vanished after analyze

 - **Trigger:** Semantic search quality drops; `stats.embeddings` in `meta.json` is 0 after refresh.
@@ -1,4 +1,5 @@
 # GitNexus
+
 **⚠️ Important Notice:** GitNexus has NO official cryptocurrency, token, or coin. Any token/coin using the GitNexus name on Pump.fun or any other platform is **not affiliated with, endorsed by, or created by** this project or its maintainers. Do not purchase any cryptocurrency claiming association with GitNexus.

 <div align="center">
@@ -18,6 +19,9 @@
  <a href="https://polyformproject.org/licenses/noncommercial/1.0.0/">
    <img src="https://img.shields.io/badge/License-PolyForm%20Noncommercial-blue.svg" alt="License: PolyForm Noncommercial"/>
  </a>
+  <a href="https://securityscorecards.dev/viewer/?uri=github.com/abhigyanpatwari/GitNexus">
+    <img src="https://api.securityscorecards.dev/projects/github.com/abhigyanpatwari/GitNexus/badge" alt="OpenSSF Scorecard"/>
+  </a>

  <p><strong>Enterprise (SaaS & Self-hosted)</strong> - <a href="https://akonlabs.com">akonlabs.com</a></p>

@@ -27,14 +31,9 @@

 Indexes any codebase into a knowledge graph — every dependency, call chain, cluster, and execution flow — then exposes it through smart tools so AI agents never miss code.

-
-
-
 https://github.com/user-attachments/assets/172685ba-8e54-4ea7-9ad1-e31a3398da72

-
-
-> *Like DeepWiki, but deeper.* DeepWiki helps you *understand* code. GitNexus lets you *analyze* it — because a knowledge graph tracks every relationship, not just descriptions.
+> _Like DeepWiki, but deeper._ DeepWiki helps you _understand_ code. GitNexus lets you _analyze_ it — because a knowledge graph tracks every relationship, not just descriptions.

 **TL;DR:** The **Web UI** is a quick way to chat with any repo. The **CLI + MCP** is how you make your AI agent actually reliable — it gives Cursor, Claude Code, Codex, and friends a deep architectural view of your codebase so they stop missing dependencies, breaking call chains, and shipping blind edits. Even smaller models get full architectural clarity, making it compete with Goliath models.

@@ -44,18 +43,17 @@ https://github.com/user-attachments/assets/172685ba-8e54-4ea7-9ad1-e31a3398da72

 [![Star History Chart](https://api.star-history.com/svg?repos=abhigyanpatwari/GitNexus&type=date&legend=top-left)](https://www.star-history.com/#abhigyanpatwari/GitNexus&type=date&legend=top-left)

-
 ## Two Ways to Use GitNexus

-|                   | **CLI + MCP**                                            | **Web UI**                                             |
-| ----------------- | -------------------------------------------------------------- | ------------------------------------------------------------ |
-| **What**    | Index repos locally, connect AI agents via MCP                 | Visual graph explorer + AI chat in browser                   |
-| **For**     | Daily development with Cursor, Claude Code, Codex, Windsurf, OpenCode | Quick exploration, demos, one-off analysis                   |
-| **Scale**   | Full repos, any size                                           | Limited by browser memory (~5k files), or unlimited via backend mode |
-| **Install** | `npm install -g gitnexus`                                    | No install — [gitnexus.vercel.app](https://gitnexus.vercel.app) |
-| **Storage** | LadybugDB native (fast, persistent)                               | LadybugDB WASM (in-memory, per session)                         |
-| **Parsing** | Tree-sitter native bindings                                    | Tree-sitter WASM                                             |
-| **Privacy** | Everything local, no network                                   | Everything in-browser, no server                             |
+|             | **CLI + MCP**                                                         | **Web UI**                                                           |
+| ----------- | --------------------------------------------------------------------- | -------------------------------------------------------------------- |
+| **What**    | Index repos locally, connect AI agents via MCP                        | Visual graph explorer + AI chat in browser                           |
+| **For**     | Daily development with Cursor, Claude Code, Codex, Windsurf, OpenCode | Quick exploration, demos, one-off analysis                           |
+| **Scale**   | Full repos, any size                                                  | Limited by browser memory (~5k files), or unlimited via backend mode |
+| **Install** | `npm install -g gitnexus`                                             | No install — [gitnexus.vercel.app](https://gitnexus.vercel.app)      |
+| **Storage** | LadybugDB native (fast, persistent)                                   | LadybugDB WASM (in-memory, per session)                              |
+| **Parsing** | Tree-sitter native bindings                                           | Tree-sitter WASM                                                     |
+| **Privacy** | Everything local, no network                                          | Everything in-browser, no server                                     |

 > **Bridge mode:** `gitnexus serve` connects the two — the web UI auto-detects the local server and can browse all your CLI-indexed repos without re-uploading or re-indexing.

@@ -66,6 +64,7 @@ https://github.com/user-attachments/assets/172685ba-8e54-4ea7-9ad1-e31a3398da72
 GitNexus is available as an **enterprise offering** - either as a fully managed **SaaS** or a **self-hosted** deployment. Also available for **commercial use** of the OSS version with proper licensing.

 Enterprise includes:
+
 - **PR Review** - automated blast radius analysis on pull requests
 - **Auto-updating Code Wiki** - always up-to-date documentation (Code Wiki is also available in OSS)
 - **Auto-reindexing** - knowledge graph stays fresh automatically
@@ -74,6 +73,7 @@ Enterprise includes:
 - **Priority feature/language support** - request new languages or features

 **Upcoming:**
+
 - Auto regression forensics
 - End-to-end test generation

@@ -106,19 +106,21 @@ That's it. This indexes the codebase, installs agent skills, registers Claude Co

 To configure MCP for your editor, run `npx gitnexus setup` once — or set it up manually below.

+> **Faster install (no C++ toolchain needed):** set `GITNEXUS_SKIP_OPTIONAL_GRAMMARS=1` before `npm install -g gitnexus` to skip vendored grammar materialize/build (`tree-sitter-dart`, `tree-sitter-proto`, `tree-sitter-swift`). Dart/Proto/Swift files won't be parsed, but install completes in seconds without `python3`/`make`/`g++`. Strict `=1` only — any other value falls through to the rebuild.
+
 ### MCP Setup

 `gitnexus setup` auto-detects your editors and writes the correct global MCP config. You only need to run it once.

 ### Editor Support

-| Editor                | MCP | Skills | Hooks (auto-augment) | Support        |
-| --------------------- | --- | ------ | -------------------- | -------------- |
-| **Claude Code** | Yes | Yes    | Yes (PreToolUse + PostToolUse) | **Full** |
-| **Cursor**      | Yes | Yes    | —                   | MCP + Skills   |
-| **Codex**       | Yes | Yes    | —                   | MCP + Skills   |
-| **Windsurf**    | Yes | —     | —                   | MCP            |
-| **OpenCode**    | Yes | Yes    | —                   | MCP + Skills   |
+| Editor          | MCP | Skills | Hooks (auto-augment)                                                                    | Support      |
+| --------------- | --- | ------ | --------------------------------------------------------------------------------------- | ------------ |
+| **Claude Code** | Yes | Yes    | Yes (PreToolUse + PostToolUse)                                                          | **Full**     |
+| **Cursor**      | Yes | Yes    | Yes (postToolUse, [manual install](gitnexus-cursor-integration/README.md#hook-install)) | **Full**     |
+| **Codex**       | Yes | Yes    | —                                                                                       | MCP + Skills |
+| **Windsurf**    | Yes | —      | —                                                                                       | MCP          |
+| **OpenCode**    | Yes | Yes    | —                                                                                       | MCP + Skills |

 > **Claude Code** gets the deepest integration: MCP tools + agent skills + PreToolUse hooks that enrich searches with graph context + PostToolUse hooks that detect a stale index after commits and prompt the agent to reindex.

@@ -126,15 +128,17 @@ To configure MCP for your editor, run `npx gitnexus setup` once — or set it up

 Built by the community — not officially maintained, but worth checking out.

-| Project | Author | Description |
-|---------|--------|-------------|
-| [pi-gitnexus](https://github.com/tintinweb/pi-gitnexus) | [@tintinweb](https://github.com/tintinweb) | GitNexus plugin for [pi](https://pi.dev) — `pi install npm:pi-gitnexus` |
-| [gitnexus-stable-ops](https://github.com/ShunsukeHayashi/gitnexus-stable-ops) | [@ShunsukeHayashi](https://github.com/ShunsukeHayashi) | Stable ops & deployment workflows (Miyabi ecosystem) |
+| Project                                                                       | Author                                                 | Description                                                             |
+| ----------------------------------------------------------------------------- | ------------------------------------------------------ | ----------------------------------------------------------------------- |
+| [pi-gitnexus](https://github.com/tintinweb/pi-gitnexus)                       | [@tintinweb](https://github.com/tintinweb)             | GitNexus plugin for [pi](https://pi.dev) — `pi install npm:pi-gitnexus` |
+| [gitnexus-stable-ops](https://github.com/ShunsukeHayashi/gitnexus-stable-ops) | [@ShunsukeHayashi](https://github.com/ShunsukeHayashi) | Stable ops & deployment workflows (Miyabi ecosystem)                    |

 > Have a project built on GitNexus? Open a PR to add it here!

 If you prefer manual configuration:

+> **Recommended for fastest startup:** install gitnexus globally (`npm i -g gitnexus`) and run `gitnexus setup` — this writes an absolute-path MCP config that bypasses `npx` entirely. The pinned-`npx` snippets below are a quickstart fallback; on a cold cache the `npx` install can exceed Claude Code's `MCP_TIMEOUT` default (~30s).
+
 **Claude Code** (full support — MCP + skills + hooks):

 ```bash
@@ -190,7 +194,8 @@ args = ["-y", "gitnexus@latest", "mcp"]
 ```bash
 gitnexus setup                   # Configure MCP for your editors (one-time)
 gitnexus analyze [path]          # Index a repository (or update stale index)
-gitnexus analyze --force         # Force full re-index
+gitnexus analyze --repair-fts    # Fast path: rebuild/verify only FTS indexes on existing index data
+gitnexus analyze --force         # Full rebuild: re-parse + graph rebuild + FTS rebuild
 gitnexus analyze --skills        # Generate repo-specific skill files from detected communities
 gitnexus analyze --skip-embeddings  # Skip embedding generation (faster)
 gitnexus analyze --skip-agents-md  # Preserve custom AGENTS.md/CLAUDE.md gitnexus section edits
@@ -198,6 +203,8 @@ gitnexus analyze --skip-git        # Index folders that are not Git repositories
 gitnexus analyze --embeddings    # Enable embedding generation (slower, better search)
 gitnexus analyze --verbose       # Log skipped files when parsers are unavailable
 gitnexus analyze --worker-timeout 60  # Increase worker idle timeout for slow parses
+gitnexus analyze --wal-checkpoint-threshold 67108864  # 64 MiB. Control LadybugDB WAL auto-checkpoint threshold (default: 67108864 = 64 MiB; -1 keeps Ladybug stock ~16 MiB)
+gitnexus analyze --workers <n>        # Parse worker pool size (default: cores-1, capped at 16; 0 = sequential)
 gitnexus mcp                     # Start MCP server (stdio) — serves all indexed repos
 gitnexus serve                   # Start local HTTP server (multi-repo) for web UI connection
 gitnexus list                    # List all indexed repositories
@@ -207,6 +214,7 @@ gitnexus clean --all --force     # Delete all indexes
 gitnexus wiki [path]             # Generate repository wiki from knowledge graph
 gitnexus wiki --model <model>    # Wiki with custom LLM model (default: gpt-4o-mini)
 gitnexus wiki --base-url <url>   # Wiki with custom LLM API base URL
+gitnexus publish                 # Notify the understand-quickly registry (opt-in, see below)

 # Repository groups (multi-repo / monorepo service tracking)
 gitnexus group create <name>                                   # Create a repository group
@@ -221,31 +229,59 @@ gitnexus group status <name>     # Check staleness of repos in a group

 If `analyze` reports a worker parse timeout on a large or unusual repository, it keeps running and falls back safely. To give slow worker jobs more time, use `gitnexus analyze --worker-timeout 60` or set `GITNEXUS_WORKER_SUB_BATCH_TIMEOUT_MS=60000`. For very large files, `GITNEXUS_WORKER_SUB_BATCH_MAX_BYTES` controls the worker job byte budget.

+#### Environment variables
+
+Most `analyze` knobs are also CLI flags (`--workers`, `--worker-timeout`, `--max-file-size`, `--verbose`). Use the env-var form when you'd otherwise repeat the same flag every run, or when invoking GitNexus from a long-running host (MCP server, eval-server, CI shell) that already manages its own environment. CLI flags take precedence over env vars; env vars take precedence over built-in defaults.
+
+| Variable                               | Default                   | Effect                                                                                                                                                     | Tune when…                                                                                                                                  |
+| -------------------------------------- | ------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------- |
+| `GITNEXUS_WORKER_POOL_SIZE`            | `cores - 1`, capped at 16 | Parse worker pool size. `0` disables the pool (sequential fallback). Equivalent to `--workers <n>`.                                                        | Constrained containers (cgroup CPU limits), CI runners with explicit quotas, or debugging a worker-only crash via `0`.                      |
+| `GITNEXUS_PARSE_CHUNK_CONCURRENCY`     | `2`                       | Number of chunks whose file contents may be read into memory in parallel while the pool dispatches the current chunk. Worker dispatch itself stays serial. | Repos large enough to chunk (multi-MB total source) where disk I/O is a measurable fraction of analyze wall-clock.                          |
+| `GITNEXUS_VERBOSE`                     | unset                     | When `1`, enables verbose ingestion logs (skipped-file warnings, per-chunk throughput, parse-cache stats). Equivalent to `--verbose`.                      | Debugging an analyze that "completed" but seems to have missed files; tuning `--workers` / chunk concurrency against observable throughput. |
+| `GITNEXUS_PROFILE_DEFERRED`            | unset                     | When `1`, emits `[deferred-profile]` timing/progress logs for the post-chunk deferred resolution band (imports → heritage → buildHeritageMap → legacy call resolution). Implied by `GITNEXUS_VERBOSE`. | Diagnosing analyze stalls in "Resolving calls (all chunks)" on large Java/Kotlin repos (issue #1741) without the full verbose ingestion noise. |
+| `GITNEXUS_PROFILE_DEFERRED_SLOW_MS`    | `3000` (verbose) / `5000` | Per-file threshold in ms above which `processCallsFromExtracted` emits a `slow file …` log line. Parsed via `Number()`: accepts integers (`5000`), scientific notation (`2.5e3`), decimals (`.5`), and hex (`0x10`). Non-finite or non-positive values fall back to the default. | Hunting a few outlier files dominating the deferred call-resolution stage; lower to surface more, raise to focus only on the worst.          |
+| `GITNEXUS_MAX_FILE_SIZE`               | `512` (KB)                | Walker skip threshold in KB. Hard cap is `32768` (tree-sitter buffer ceiling). Equivalent to `--max-file-size <kb>`.                                       | Indexing repos with intentionally-large source files (generated parsers, vendored bundles) that should still be parsed.                     |
+| `GITNEXUS_WORKER_SUB_BATCH_TIMEOUT_MS` | `30000`                   | Worker idle timeout in milliseconds before retry/fallback. Equivalent to `--worker-timeout <seconds>` × 1000.                                              | Slow-parsing files (large minified JS, deeply-nested TS types) that legitimately need more than 30s.                                        |
+| `GITNEXUS_WAL_CHECKPOINT_THRESHOLD`       | `67108864` (64 MiB)       | LadybugDB WAL auto-checkpoint threshold in bytes. Equivalent to `--wal-checkpoint-threshold <bytes>`. `-1` keeps LadybugDB's stock threshold (~16 MiB). Larger thresholds reduce checkpoint frequency but increase the WAL size at rotation time — choose a smaller value on disk-constrained environments. | You need a larger or smaller WAL auto-checkpoint threshold for your analyze workload.                                                         |
+| `GITNEXUS_WORKER_SUB_BATCH_MAX_BYTES`  | `8388608` (8 MB)          | Per-job byte budget the pool will send to a worker in one `postMessage`.                                                                                   | Very large individual files; mostly diagnostic — bumping past 8 MB risks structured-clone memory pressure.                                  |
+| `GITNEXUS_WORKER_MAX_RESPAWNS_PER_SLOT`        | `3`                       | Max replacement spawns per worker slot before the slot is dropped from the active rotation. Bounds respawn loops on a chronically-crashing slot.           | Hosts where a flaky worker should retry more (raise) or fail-fast (lower) before the slot is dropped.                                       |
+| `GITNEXUS_WORKER_MAX_CUMULATIVE_TIMEOUT_MS`    | `5 × subBatchTimeoutMs`   | Total retry wall-time budget per job before quarantining. Combined with `timeoutBackoffFactor`, prevents exponentially-growing retries from stalling for hours. | Slow files that legitimately need long total retry windows; lower to fail-fast on stalls.                                                    |
+| `GITNEXUS_WORKER_CONSECUTIVE_FAILURE_THRESHOLD`| `max(3, poolSize)`        | Per-slot consecutive deaths before the pool's circuit breaker trips. After tripping, every subsequent dispatch rejects until a fresh pool is created.       | Hosts where a SIGSEGV-prone native grammar should trip the breaker sooner; CI runners that should fail loudly.                              |
+| `GITNEXUS_CHUNK_BYTE_BUDGET`           | `2097152` (2 MB)          | Chunk boundary used for cache-key composition and dispatch. Smaller = finer-grained cache hits but more dispatch overhead.                                 | Tuning incremental-analyze cache behavior on monorepos.                                                                                     |
+| `GITNEXUS_NO_GITIGNORE`                | unset                     | When set, skips `.gitignore` parsing. `.gitnexusignore` is still honored.                                                                                  | Indexing a repo whose `.gitignore` excludes files you actually want indexed (e.g., generated code committed for cross-repo lookup).         |
+| `GITNEXUS_SKIP_OPTIONAL_GRAMMARS`      | unset                     | When `=1` strictly, skips vendored grammar materialize/build for `tree-sitter-dart`, `tree-sitter-proto`, and `tree-sitter-swift` at install time.        | Installing on a host without a C++ toolchain or where Swift prebuilds don't match; you're willing to skip Dart/Proto/Swift parsing.         |
+
+#### Publishing to understand-quickly (opt-in)
+
+[`looptech-ai/understand-quickly`](https://github.com/looptech-ai/understand-quickly) is a public registry of code-knowledge graphs that lists `gitnexus@1` as a first-class format. After registering your repo once (`npx @understand-quickly/cli add` or the [wizard](https://looptech-ai.github.io/understand-quickly/add.html)), `gitnexus publish` fires a single `repository_dispatch` event so the registry resyncs your entry on demand instead of waiting for the nightly job.
+
+It is opt-in and a no-op without `UNDERSTAND_QUICKLY_TOKEN` — a fine-grained GitHub PAT with `Repository dispatches: write` on the registry repo. Nothing else happens; no graph file is uploaded. See the [protocol spec](https://github.com/looptech-ai/understand-quickly/blob/main/docs/integrations/protocol.md) for the full contract.
+
 ### What Your AI Agent Gets

 **16 tools** exposed via MCP (11 per-repo + 5 group):

-| Tool               | What It Does                                                      | `repo` Param |
-| ------------------ | ----------------------------------------------------------------- | -------------- |
-| `list_repos`     | Discover all indexed repositories                                 | —             |
-| `query`          | Process-grouped hybrid search (BM25 + semantic + RRF)             | Optional       |
-| `context`        | 360-degree symbol view — categorized refs, process participation | Optional       |
-| `impact`         | Blast radius analysis with depth grouping and confidence          | Optional       |
-| `detect_changes` | Git-diff impact — maps changed lines to affected processes       | Optional       |
-| `rename`         | Multi-file coordinated rename with graph + text search            | Optional       |
-| `cypher`         | Raw Cypher graph queries                                          | Optional       |
-| `group_list`     | List configured repository groups                                 | —             |
-| `group_sync`     | Extract contracts and match across repos/services                 | —             |
-| `group_contracts`| Inspect extracted contracts and cross-links                       | —             |
-| `group_query`    | Search execution flows across all repos in a group                | —             |
-| `group_status`   | Check staleness of repos in a group                               | —             |
+| Tool              | What It Does                                                     | `repo` Param |
+| ----------------- | ---------------------------------------------------------------- | ------------ |
+| `list_repos`      | Discover all indexed repositories                                | —            |
+| `query`           | Process-grouped hybrid search (BM25 + semantic + RRF)            | Optional     |
+| `context`         | 360-degree symbol view — categorized refs, process participation | Optional     |
+| `impact`          | Blast radius analysis with depth grouping and confidence         | Optional     |
+| `detect_changes`  | Git-diff impact — maps changed lines to affected processes       | Optional     |
+| `rename`          | Multi-file coordinated rename with graph + text search           | Optional     |
+| `cypher`          | Raw Cypher graph queries                                         | Optional     |
+| `group_list`      | List configured repository groups                                | —            |
+| `group_sync`      | Extract contracts and match across repos/services                | —            |
+| `group_contracts` | Inspect extracted contracts and cross-links                      | —            |
+| `group_query`     | Search execution flows across all repos in a group               | —            |
+| `group_status`    | Check staleness of repos in a group                              | —            |

 > When only one repo is indexed, the `repo` parameter is optional. With multiple repos, specify which one: `query({query: "auth", repo: "my-app"})`.

 **Resources** for instant context:

-| Resource                                  | Purpose                                              |
-| ----------------------------------------- | ---------------------------------------------------- |
+| Resource                                | Purpose                                              |
+| --------------------------------------- | ---------------------------------------------------- |
 | `gitnexus://repos`                      | List all indexed repositories (read this first)      |
 | `gitnexus://repo/{name}/context`        | Codebase stats, staleness check, and available tools |
 | `gitnexus://repo/{name}/clusters`       | All functional clusters with cohesion scores         |
@@ -256,9 +292,9 @@ If `analyze` reports a worker parse timeout on a large or unusual repository, it

 **2 MCP prompts** for guided workflows:

-| Prompt            | What It Does                                                              |
-| ----------------- | ------------------------------------------------------------------------- |
-| `detect_impact` | Pre-commit change analysis — scope, affected processes, risk level       |
+| Prompt          | What It Does                                                              |
+| --------------- | ------------------------------------------------------------------------- |
+| `detect_impact` | Pre-commit change analysis — scope, affected processes, risk level        |
 | `generate_map`  | Architecture documentation from the knowledge graph with mermaid diagrams |

 **4 agent skills** installed to `.claude/skills/` automatically:
@@ -345,10 +381,10 @@ npx gitnexus@latest serve

 The official Docker setup ships **two signed images** orchestrated by `docker-compose.yaml`. Each image is published to both **GitHub Container Registry** (GHCR) and **Docker Hub** — same build, same digest, same Cosign signature — so pick whichever registry you prefer:

-| Purpose                                                                | GHCR (default in `docker-compose.yaml`)       | Docker Hub mirror                           |
-| ---------------------------------------------------------------------- | --------------------------------------------- | ------------------------------------------- |
-| CLI / `gitnexus serve` backend (HTTP API on port `4747`, MCP, indexer) | `ghcr.io/abhigyanpatwari/gitnexus:latest`     | `akonlabs/gitnexus:latest`                  |
-| Static web UI (port `4173`)                                            | `ghcr.io/abhigyanpatwari/gitnexus-web:latest` | `akonlabs/gitnexus-web:latest`              |
+| Purpose                                                                | GHCR (default in `docker-compose.yaml`)       | Docker Hub mirror              |
+| ---------------------------------------------------------------------- | --------------------------------------------- | ------------------------------ |
+| CLI / `gitnexus serve` backend (HTTP API on port `4747`, MCP, indexer) | `ghcr.io/abhigyanpatwari/gitnexus:latest`     | `akonlabs/gitnexus:latest`     |
+| Static web UI (port `4173`)                                            | `ghcr.io/abhigyanpatwari/gitnexus-web:latest` | `akonlabs/gitnexus-web:latest` |

 > **Heads-up — image rename.** Earlier releases published the web UI under
 > `ghcr.io/abhigyanpatwari/gitnexus`. Starting with the introduction of the
@@ -415,7 +451,7 @@ The Docker images are version-locked to the npm package:
  Both registries receive the same digest from a single build step, so you can
  pull from either and the signature verifies identically.
 - Release-candidate images (e.g. `:1.7.0-rc.1`) are published alongside each
-  RC npm release. They are built by `release-candidate.yml` calling `docker.yml`
+  RC npm release. They are built by `publish.yml` calling `docker.yml`
  as a reusable workflow after the RC tag is created and pushed.
 - `:latest` is auto-promoted only from non-prerelease tags by the Docker
  metadata action, so it always points at a real, npm-published version.
@@ -448,7 +484,7 @@ registries because both sets of tags were signed at the same digest in one
 workflow run.

 **Release candidates** — signed from `refs/heads/main` (the caller's ref when
-`release-candidate.yml` invokes `docker.yml` as a reusable workflow):
+`publish.yml` invokes `docker.yml` as a reusable workflow):

 ```bash
 cosign verify ghcr.io/abhigyanpatwari/gitnexus:1.7.0-rc.1 \
@@ -564,22 +600,22 @@ GitNexus builds a complete knowledge graph of your codebase through a multi-phas

 ### Supported Languages

-| Language | Imports | Named Bindings | Exports | Heritage | Type Annotations | Constructor Inference | Config | Frameworks | Entry Points |
-|----------|---------|----------------|---------|----------|-----------------|---------------------|--------|------------|-------------|
-| TypeScript | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
-| JavaScript | ✓ | ✓ | ✓ | ✓ | — | ✓ | ✓ | ✓ | ✓ |
-| Python | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
-| Java | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | — | ✓ | ✓ |
-| Kotlin | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | — | ✓ | ✓ |
-| C# | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
-| Go | ✓ | — | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
-| Rust | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | — | ✓ | ✓ |
-| PHP | ✓ | ✓ | ✓ | — | ✓ | ✓ | ✓ | ✓ | ✓ |
-| Ruby | ✓ | — | ✓ | ✓ | — | ✓ | — | ✓ | ✓ |
-| Swift | — | — | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
-| C | — | — | ✓ | — | ✓ | ✓ | — | ✓ | ✓ |
-| C++ | — | — | ✓ | ✓ | ✓ | ✓ | — | ✓ | ✓ |
-| Dart | ✓ | — | ✓ | ✓ | ✓ | ✓ | — | ✓ | ✓ |
+| Language   | Imports | Named Bindings | Exports | Heritage | Type Annotations | Constructor Inference | Config | Frameworks | Entry Points |
+| ---------- | ------- | -------------- | ------- | -------- | ---------------- | --------------------- | ------ | ---------- | ------------ |
+| TypeScript | ✓       | ✓              | ✓       | ✓        | ✓                | ✓                     | ✓      | ✓          | ✓            |
+| JavaScript | ✓       | ✓              | ✓       | ✓        | —                | ✓                     | ✓      | ✓          | ✓            |
+| Python     | ✓       | ✓              | ✓       | ✓        | ✓                | ✓                     | ✓      | ✓          | ✓            |
+| Java       | ✓       | ✓              | ✓       | ✓        | ✓                | ✓                     | —      | ✓          | ✓            |
+| Kotlin     | ✓       | ✓              | ✓       | ✓        | ✓                | ✓                     | —      | ✓          | ✓            |
+| C#         | ✓       | ✓              | ✓       | ✓        | ✓                | ✓                     | ✓      | ✓          | ✓            |
+| Go         | ✓       | —              | ✓       | ✓        | ✓                | ✓                     | ✓      | ✓          | ✓            |
+| Rust       | ✓       | ✓              | ✓       | ✓        | ✓                | ✓                     | —      | ✓          | ✓            |
+| PHP        | ✓       | ✓              | ✓       | —        | ✓                | ✓                     | ✓      | ✓          | ✓            |
+| Ruby       | ✓       | —              | ✓       | ✓        | —                | ✓                     | —      | ✓          | ✓            |
+| Swift      | —       | —              | ✓       | ✓        | ✓                | ✓                     | ✓      | ✓          | ✓            |
+| C          | —       | —              | ✓       | —        | ✓                | ✓                     | —      | ✓          | ✓            |
+| C++        | —       | —              | ✓       | ✓        | ✓                | ✓                     | —      | ✓          | ✓            |
+| Dart       | ✓       | —              | ✓       | ✓        | ✓                | ✓                     | —      | ✓          | ✓            |

 **Imports** — cross-file import resolution · **Named Bindings** — `import { X as Y }` / re-export tracking · **Exports** — public/exported symbol detection · **Heritage** — class inheritance, interfaces, mixins · **Type Annotations** — explicit type extraction for receiver resolution · **Constructor Inference** — infer receiver type from constructor calls (`self`/`this` resolution included for all languages) · **Config** — language toolchain config parsing (tsconfig, go.mod, etc.) · **Frameworks** — AST-based framework pattern detection · **Entry Points** — entry point scoring heuristics

@@ -708,6 +744,14 @@ gitnexus wiki --base-url https://api.anthropic.com/v1

 # Force full regeneration
 gitnexus wiki --force
+
+
+# Increase the timeout or retries for large codebase or slow LLM providers
+gitnexus wiki --timeout <seconds> # LLM request timeout in seconds (default: disabled)
+gitnexus wiki --retries <n>      # Max LLM retry attempts per request (default: 3)
+
+# Change the language generation for wiki
+gitnexus wiki --lang <lang>  # Output language for generated documentation (e.g. english, chinese, spanish, japanese)
 ```

 The wiki generator reads the indexed graph structure, groups files into modules via LLM, generates per-module documentation pages, and creates an overview page — all with cross-references to the knowledge graph.
@@ -716,16 +760,16 @@ The wiki generator reads the indexed graph structure, groups files into modules

 ## Tech Stack

-| Layer                     | CLI                                   | Web                                     |
-| ------------------------- | ------------------------------------- | --------------------------------------- |
+| Layer               | CLI                                   | Web                                     |
+| ------------------- | ------------------------------------- | --------------------------------------- |
 | **Runtime**         | Node.js (native)                      | Browser (WASM)                          |
 | **Parsing**         | Tree-sitter native bindings           | Tree-sitter WASM                        |
-| **Database**        | LadybugDB native                         | LadybugDB WASM                             |
+| **Database**        | LadybugDB native                      | LadybugDB WASM                          |
 | **Embeddings**      | HuggingFace transformers.js (GPU/CPU) | transformers.js (WebGPU/WASM)           |
 | **Search**          | BM25 + semantic + RRF                 | BM25 + semantic + RRF                   |
 | **Agent Interface** | MCP (stdio)                           | LangChain ReAct agent                   |
-| **Visualization**   | —                                    | Sigma.js + Graphology (WebGL)           |
-| **Frontend**        | —                                    | React 18, TypeScript, Vite, Tailwind v4 |
+| **Visualization**   | —                                     | Sigma.js + Graphology (WebGL)           |
+| **Frontend**        | —                                     | React 18, TypeScript, Vite, Tailwind v4 |
 | **Clustering**      | Graphology                            | Graphology                              |
 | **Concurrency**     | Worker threads + async                | Web Workers + Comlink                   |

@@ -741,12 +785,12 @@ The wiki generator reads the indexed graph structure, groups files into modules

 ### Recently Completed

- [X] Constructor-Inferred Type Resolution, `self`/`this` Receiver Mapping
- [X] Wiki Generation, Multi-File Rename, Git-Diff Impact Analysis
- [X] Process-Grouped Search, 360-Degree Context, Claude Code Hooks
- [X] Multi-Repo MCP, Zero-Config Setup, 14 Language Support
- [X] Community Detection, Process Detection, Confidence Scoring
- [X] Hybrid Search, Vector Index
+- [x] Constructor-Inferred Type Resolution, `self`/`this` Receiver Mapping
+- [x] Wiki Generation, Multi-File Rename, Git-Diff Impact Analysis
+- [x] Process-Grouped Search, 360-Degree Context, Claude Code Hooks
+- [x] Multi-Repo MCP, Zero-Config Setup, 14 Language Support
+- [x] Community Detection, Process Detection, Confidence Scoring
+- [x] Hybrid Search, Vector Index

 ---

@@ -0,0 +1,67 @@
+# Security Policy
+
+## Supported Versions
+
+GitNexus is developed on `main`. Security fixes are applied to the latest released minor on npm (`gitnexus`) and to the published Docker images (`Dockerfile.cli`, `Dockerfile.web`). Older minors are not back-patched.
+
+## Reporting a Vulnerability
+
+**Please do not open a public GitHub issue for security reports.**
+
+Use **GitHub Private Vulnerability Reporting** for this repository:
+
+→ https://github.com/abhigyanpatwari/GitNexus/security/advisories/new
+
+Please include:
+
+- A description of the issue and its potential impact
+- Steps to reproduce (a minimal repro repo or commit hash if possible)
+- The affected version(s) — `npm view gitnexus version`, image digest, or commit SHA
+- Any suggested mitigation
+
+### What to expect
+
+- **Acknowledgement:** best-effort within 5 business days, subject to maintainer capacity.
+- **Triage:** we will confirm whether the report is in scope, request clarifications if needed, and propose a fix timeline.
+- **Disclosure:** coordinated. We will agree on a disclosure date with you before publishing an advisory.
+
+### Scope
+
+In scope:
+
+- The `gitnexus` CLI and MCP server (`gitnexus/`)
+- The `gitnexus-web` thin client (`gitnexus-web/`)
+- The `gitnexus-shared` types package (`gitnexus-shared/`)
+- The published Docker images (`Dockerfile.cli`, `Dockerfile.web`)
+- GitHub Actions workflows in `.github/workflows/`
+
+Out of scope:
+
+- Vulnerabilities in third-party dependencies that we have no influence over (please report upstream; if a viable mitigation exists at the GitNexus layer, that's in scope).
+- Issues requiring physical access to a developer machine or a compromised local environment.
+- Theoretical attacks without a practical exploit against a default GitNexus deployment.
+
+## Recommended Hardening for Forks and Self-Hosted Deployments
+
+If you fork GitNexus or self-host it, we recommend enabling the following in your repository's **Settings → Code security and analysis**:
+
+- **Private vulnerability reporting** — the channel described above.
+- **Dependabot alerts** — alerts on advisories affecting your dependencies.
+- **Dependabot security updates** — automated PRs for security patches (this repo's `.github/dependabot.yml` already covers version updates).
+- **Secret scanning** and **Push protection** — blocks pushes that introduce known secret patterns. Defense-in-depth on top of the in-CI Gitleaks scan documented below.
+- **Code scanning** — surfaces SARIF results from CodeQL, Trivy, Scorecard, and zizmor in one place.
+
+## Automated Scans Running in CI
+
+This repository runs the following scans automatically. Findings appear under the repository's **Security → Code scanning** tab.
+
+| Scan | Tool | Trigger | Action on finding |
+|------|------|---------|-------------------|
+| Static analysis (JS/TS, Python) | [CodeQL](https://github.com/github/codeql-action) | PR, `main` push, weekly | Advisory (Security tab) |
+| Dependency vulnerabilities (PR diff) | [`dependency-review-action`](https://github.com/actions/dependency-review-action) | PR | **Blocks PR** at `high+` severity |
+| Secret scanning | [Gitleaks](https://github.com/gitleaks/gitleaks-action) | PR, `main` push | **Blocks PR** on default rules |
+| Supply-chain posture | [OpenSSF Scorecard](https://github.com/ossf/scorecard-action) | Weekly, `main` push | Advisory (Security tab + public badge) |
+| Workflow lint | [zizmor](https://github.com/woodruffw/zizmor) | PR (touching `.github/**`) | **Blocks PR** at `high+` severity |
+| Container image scan | [Trivy](https://github.com/aquasecurity/trivy-action) | Weekly, `main` push | Advisory (Security tab) |
+
+Dependency version updates are managed separately by Dependabot — see `.github/dependabot.yml`.
@@ -10,32 +10,37 @@ How we structure tests and which commands to run locally and in CI.
 | Web UI         | `gitnexus-web/`| Vitest   | Unit/component tests           |
 | Web UI E2E     | `gitnexus-web/`| Playwright | Run when changing UI flows   |

-## Commands (local)
+## Test lanes

-From repository root, unless noted:
+### `gitnexus/` commands

-**`gitnexus` (CLI / library)**
+From `gitnexus/`:
+
+| Command                  | What it runs                                         | When to use                     |
+| ------------------------ | ---------------------------------------------------- | ------------------------------- |
+| `npm test`               | Full suite (all 3 vitest projects)                   | Before opening a PR             |
+| `npm run test:unit`      | Unit tests only (`test/unit/`)                       | Tight development loop          |
+| `npm run test:integration` | Integration tests (`test/integration/`)            | After changing pipelines, DB, workers |
+| `npm run test:coverage`  | Full suite + v8 coverage with thresholds             | Checking coverage impact        |
+| `npm run test:parity`    | Scope-resolution parity for all migrated languages   | After changing resolver or scope code |
+| `npm run test:cross-platform` | Platform-sensitive subset only                  | Debugging a Windows/macOS issue |
+| `npm run test:watch`     | Vitest in watch mode                                 | Active development              |
+
+### `gitnexus-web/` commands
+
+From `gitnexus-web/`:
+
+| Command               | What it runs                      | When to use                    |
+| ---------------------- | --------------------------------- | ------------------------------ |
+| `npm test`             | Unit/component tests (vitest)     | After changing web code        |
+| `npm run test:coverage`| Unit tests + coverage             | Checking coverage impact       |
+| `npm run test:e2e`     | Playwright browser tests          | After changing UI flows (requires `gitnexus serve` + `npm run dev`) |
+
+### Before opening a PR

 ```bash
-cd gitnexus
-npm install
-npm run build
-npm test                    # full suite: vitest run
-npm run test:unit           # unit only: vitest run test/unit
-npm run test:integration    # integration suite
-npm run test:coverage
-npx tsc --noEmit            # typecheck (matches CI)
-```
-
-**`gitnexus-web`**
-
-```bash
-cd gitnexus-web
-npm install
-npm test                    # unit tests (vitest)
-npx tsc -b --noEmit         # typecheck (matches CI)
-npm run test:coverage
-npm run test:e2e            # Playwright (requires gitnexus serve + npm run dev)
+cd gitnexus && npx tsc --noEmit && npm test
+cd ../gitnexus-web && npx tsc -b --noEmit && npm test
 ```

 ## Pre-commit hook
@@ -50,22 +55,79 @@ Tests do **not** run in the pre-commit hook — they run in CI (`ci-tests.yml`)

 Skip with `git commit --no-verify` (use sparingly).

+## Vitest projects
+
+`gitnexus/vitest.config.ts` defines three projects for safety isolation:
+
+| Project    | Files                         | Parallelism | Purpose                                       |
+| ---------- | ----------------------------- | ----------- | ---------------------------------------------- |
+| `lbug-db`  | Native LadybugDB integration tests (explicit list) | Sequential  | Prevents file-lock conflicts from native mmap addon |
+| `cli-e2e`  | `skills-e2e.test.ts`          | Sequential  | CLI process spawning requires serial execution |
+| `default`  | Everything else               | Parallel    | Fast execution for pure logic and parser tests |
+
+When adding a new test that uses native LadybugDB (`@ladybugdb/core`), add it to the `lbug-db` project's explicit include list and the `default` project's exclude list.
+
 ## Test categories

 - **Unit** — Pure logic, parsers, graph/query helpers; fast; no network.
 - **Integration** — Real combinations (filesystem, MCP wiring, larger pipelines) as already organized under `gitnexus/test/integration`.
- **Eval-style / golden sets** — For agent- or classification-style behavior, keep labeled inputs and expected outputs (JSON or table-driven tests) and run them in CI when relevant.
+- **Resolver / parity** — Language-specific call-resolution tests in `test/integration/resolvers/`.
 - **E2E (web)** — Critical user paths only; prefer `data-testid` attributes for stable selectors. Tests run against real backend (`gitnexus serve`) and Vite dev server.

-## Performance metrics (targets)
+## Scope-resolution parity

-Set targets to match team expectations, then tune to this repo’s CI reality:
+Migrated languages (listed in `MIGRATED_LANGUAGES` in `src/core/ingestion/registry-primary-flag.ts`) are tested in both legacy and registry-primary modes on every PR.

-| Metric              | Target (initial) | Notes                                      |
-| ------------------- | ---------------- | ------------------------------------------ |
-| Unit coverage       | Align with CI    | CI runs Vitest with coverage in `gitnexus` |
-| Unit wall time      | Fast PR feedback | Use `vitest run test/unit` for tight loop  |
-| Integration duration| &lt; few minutes | Guard heavy tests with env flags if needed |
+For each migrated language, CI runs the resolver test file twice:
+1. `REGISTRY_PRIMARY_<LANG>=0` — legacy DAG path
+2. `REGISTRY_PRIMARY_<LANG>=1` — registry-primary path
+
+Both must pass. Known legacy gaps are listed in `LEGACY_RESOLVER_PARITY_EXPECTED_FAILURES` in `test/integration/resolvers/helpers.ts` and are automatically skipped in legacy mode.
+
+Adding a language to `MIGRATED_LANGUAGES` automatically enrolls it in parity — no workflow or config edit needed. The test file must exist at `test/integration/resolvers/<slug>.test.ts`.
+
+Run parity locally: `cd gitnexus && npm run test:parity`
+
+Run for a single language: `cd gitnexus && npx tsx scripts/run-parity.ts --language python`
+
+## Cross-platform testing
+
+Windows and macOS CI runs only the platform-sensitive test subset (~50 files out of 373). The full suite runs on Ubuntu.
+
+The subset is defined in `gitnexus/scripts/cross-platform-tests.ts` and includes:
+
+- **Platform-specific logic** — tests with `process.platform` guards, path.sep behavior, EPERM/EBUSY error classification
+- **Native LadybugDB** — all `lbug-*` integration tests (N-API addon with known platform-varying behavior)
+- **Process spawning / CLI** — tests using real `child_process.spawn`, shell quoting, CLI invocations
+- **Worker threads** — tests spawning real `worker_threads`
+- **Native addon loading** — tree-sitter grammar loading smoke tests
+- **Filesystem behavior** — CRLF handling, directory walking, symlinks
+
+When adding a platform-sensitive test, add it to the appropriate section in `scripts/cross-platform-tests.ts`.
+
+### Confirming no tests are orphaned
+
+Every test file matches one of the three vitest projects. To verify:
+
+```bash
+cd gitnexus
+npx vitest list 2>/dev/null | wc -l  # should match total test count
+```
+
+To check the cross-platform list is up to date, run `npm run test:cross-platform` — it fails fast if any listed file is missing.
+
+## CI integration
+
+GitHub Actions (`.github/workflows/ci.yml`) orchestrate:
+
+| Workflow              | Jobs                           | Purpose                                         |
+| --------------------- | ------------------------------ | ------------------------------------------------ |
+| `ci-quality.yml`      | format, lint, typecheck, typecheck-web, workflow-convention | Code quality gates |
+| `ci-tests.yml`        | ubuntu/coverage, cross-platform (Win/Mac), packaged-install-smoke | Full suite + coverage on Ubuntu; platform-sensitive subset on Win/Mac |
+| `ci-scope-parity.yml` | discover, parity               | Scope-resolution parity for all migrated languages |
+| `ci-e2e.yml`          | e2e (chromium)                 | Playwright E2E, gated on `gitnexus-web/**` changes |
+
+The `CI Gate` job in `ci.yml` is the single required check for branch protection. It requires quality, tests, e2e, and scope-parity to all pass.

 ## Regression testing

@@ -76,23 +138,6 @@ Re-run the full relevant suite when:
 - Graph schema, query contracts, or MCP tool shapes change
 - Dependencies with parsing or runtime impact upgrade

-## CI integration
-
-GitHub Actions (`.github/workflows/ci.yml`) orchestrate:
-
- **`ci-quality.yml`** — prettier format check, eslint lint, `tsc --noEmit` for `gitnexus/`, `tsc -b --noEmit` for `gitnexus-web/`
- **`ci-tests.yml`** — `vitest run` with coverage (ubuntu) + cross-platform (macOS, Windows)
- **`ci-e2e.yml`** — Playwright E2E tests, gated on `gitnexus-web/**` changes
-
-Local checks before pushing:
-
-```bash
-cd gitnexus && npx tsc --noEmit && npm test
-cd ../gitnexus-web && npx tsc -b --noEmit && npm test
-```
-
-Or rely on the pre-commit hook which runs these automatically for staged files.
-
 ## User acceptance / beta (optional)

 For staged releases or UI betas: deploy to a staging environment, collect structured feedback, watch errors and latency, then iterate before a wider release.
@@ -19,7 +19,7 @@ services:
      - ${WORKSPACE_DIR:-./workspace}:/workspace:ro
    restart: unless-stopped
    healthcheck:
-      test: ['CMD', 'curl', '-fsSI', 'http://localhost:4747/api/heartbeat']
+      test: ['CMD', 'curl', '-f', 'http://localhost:4747/api/health']
      interval: 30s
      timeout: 5s
      retries: 3
@@ -30,6 +30,19 @@ services:
    container_name: ${WEB_CONTAINER_NAME:-gitnexus-web}
    ports:
      - '${WEB_HOST_PORT:-4173}:4173'
+    # Optional: override the backend URL served to the browser.
+    # Required when the gitnexus-server is not reachable at http://localhost:4747
+    # from the user's browser (e.g. remote server deployments).
+    #
+    # Docker Desktop (Mac/Windows):
+    #   GITNEXUS_BACKEND_URL=http://host.docker.internal:4747
+    #
+    # Linux / remote server:
+    #   GITNEXUS_BACKEND_URL=http://<server-ip>:4747
+    #   (host.docker.internal requires extra_hosts on Linux Docker Engine)
+    #
+    # environment:
+    #   - GITNEXUS_BACKEND_URL=http://host.docker.internal:4747
    depends_on:
      gitnexus-server:
        condition: service_healthy
@@ -1,11 +1,38 @@
-import { createReadStream } from 'node:fs';
-import { stat } from 'node:fs/promises';
+import { open, stat } from 'node:fs/promises';
 import { createServer } from 'node:http';
-import { extname, join, normalize, sep } from 'node:path';
+import { extname, isAbsolute, normalize, relative, resolve, sep } from 'node:path';

 const host = '0.0.0.0';
 const port = Number(process.env.PORT || '4173');
-const root = join(process.cwd(), 'dist');
+const root = resolve(process.cwd(), 'dist');
+
+function isValidUrl(value) {
+  try {
+    const u = new URL(value);
+    return u.protocol === 'http:' || u.protocol === 'https:';
+  } catch {
+    return false;
+  }
+}
+
+function jsonForScriptTag(obj) {
+  return JSON.stringify(obj)
+    .replace(/</g, '\\u003c')
+    .replace(/>/g, '\\u003e')
+    .replace(/&/g, '\\u0026');
+}
+
+const rawBackendUrl = process.env.GITNEXUS_BACKEND_URL ?? null;
+if (rawBackendUrl && !isValidUrl(rawBackendUrl)) {
+  const safeRaw = rawBackendUrl.replace(/[\x00-\x1f\x7f]/g, ' ').slice(0, 200);
+  console.warn(
+    `[gitnexus-web] GITNEXUS_BACKEND_URL "${safeRaw}" is not a valid http/https URL -- ignoring.`,
+  );
+}
+const backendUrl = rawBackendUrl && isValidUrl(rawBackendUrl) ? rawBackendUrl : null;
+const configScript = backendUrl
+  ? `<script>window.__GITNEXUS_CONFIG__=${jsonForScriptTag({ backendUrl })};</script>`
+  : '';

 const contentTypes = {
  '.css': 'text/css; charset=utf-8',
@@ -20,59 +47,123 @@ const contentTypes = {
  '.woff2': 'font/woff2',
 };

-function resolvePath(urlPath) {
+// Static asset server for the gitnexus-web Docker image.
+//
+// Path-injection containment: each filesystem sink is preceded by the
+// canonical `path.relative` containment check that CodeQL recognizes as
+// a sanitizer barrier.
+//
+// TOCTOU prevention: after the path barrier, the file is opened once via
+// fs.promises.open() and all subsequent operations (stat, readFile,
+// createReadStream) use the file handle, eliminating any race between
+// the existence check and the read.
+const server = createServer(async (req, res) => {
+  const urlPath = req.url?.split('?')[0] || '/';
+
  let decoded;
  try {
    decoded = decodeURIComponent(urlPath);
  } catch {
-    return null;
+    res.writeHead(400);
+    res.end('Bad request');
+    return;
  }
-  if (decoded.includes('\0')) return null;
-  const cleanPath = normalize(decoded.replace(/^\/+/, ''));
-  const candidate = join(root, cleanPath);
-  if (candidate !== root && !candidate.startsWith(root + sep)) return null;
-  return candidate;
-}
-
-const server = createServer(async (req, res) => {
-  const requestPath = req.url?.split('?')[0] || '/';
-  let filePath = resolvePath(requestPath);
-
-  if (!filePath) {
+  if (decoded.includes('\0')) {
    res.writeHead(400);
    res.end('Bad request');
    return;
  }

+  const cleanPath = normalize(decoded.replace(/^\/+/, ''));
+  const initialPath = resolve(root, cleanPath);
+
+  // Sanitizer barrier #1 — guards the first stat() sink.
+  const initialRel = relative(root, initialPath);
+  if (initialRel.startsWith('..') || isAbsolute(initialRel)) {
+    res.writeHead(400);
+    res.end('Bad request');
+    return;
+  }
+
+  let handle;
  try {
-    const fileStat = await stat(filePath).catch(() => null);
-    if (fileStat?.isDirectory()) {
-      filePath = join(filePath, 'index.html');
-    } else if (!fileStat?.isFile()) {
-      filePath = join(root, 'index.html');
+    const initialStat = await stat(initialPath).catch(() => null);
+
+    // Pick the path we actually serve. Note: any branch reassigns to a
+    // freshly-resolved path; the next sanitizer barrier re-validates.
+    let finalPath;
+    if (initialStat?.isDirectory()) {
+      finalPath = resolve(initialPath, 'index.html');
+    } else if (!initialStat?.isFile()) {
+      finalPath = resolve(root, 'index.html');
+    } else {
+      finalPath = initialPath;
    }

-    const finalStat = await stat(filePath).catch(() => null);
-    if (!finalStat?.isFile()) {
+    // Sanitizer barrier #2 — guards the open() sink below. No
+    // reassignment of finalPath happens between this guard and the
+    // open(), so the analyzer can prove containment.
+    const finalRel = relative(root, finalPath);
+    if (finalRel.startsWith('..') || isAbsolute(finalRel)) {
+      res.writeHead(400);
+      res.end('Bad request');
+      return;
+    }
+
+    handle = await open(finalPath, 'r').catch(() => null);
+    if (!handle) {
+      res.writeHead(404);
+      res.end('Not found');
+      return;
+    }
+    const finalStat = await handle.stat();
+    if (!finalStat.isFile()) {
      res.writeHead(404);
      res.end('Not found');
      return;
    }

-    res.writeHead(200, {
-      'Cache-Control': filePath.includes('/assets/')
-        ? 'public, max-age=31536000, immutable'
-        : 'no-cache',
-      'Content-Type': contentTypes[extname(filePath)] || 'application/octet-stream',
-      'Cross-Origin-Opener-Policy': 'same-origin',
-      'Cross-Origin-Embedder-Policy': 'require-corp',
-    });
-    const stream = createReadStream(filePath);
-    stream.on('error', () => res.destroy());
-    stream.pipe(res);
+    const isHtml = extname(finalPath) === '.html' || !extname(finalPath);
+    const cacheControl = finalPath.includes(`${sep}assets${sep}`)
+      ? 'public, max-age=31536000, immutable'
+      : 'no-cache';
+    const contentType = contentTypes[extname(finalPath)] || 'application/octet-stream';
+
+    if (isHtml && configScript) {
+      const raw = await handle.readFile('utf8');
+      await handle.close();
+      handle = null;
+      if (!raw.includes('</head>')) {
+        console.warn('[gitnexus-web] Could not inject config: no </head> tag found in HTML');
+      }
+      const html = raw.includes('</head>') ? raw.replace('</head>', `${configScript}</head>`) : raw;
+      const buf = Buffer.from(html, 'utf8');
+      res.writeHead(200, {
+        'Cache-Control': cacheControl,
+        'Content-Type': 'text/html; charset=utf-8',
+        'Content-Length': buf.length,
+        'Cross-Origin-Opener-Policy': 'same-origin',
+        'Cross-Origin-Embedder-Policy': 'require-corp',
+      });
+      res.end(buf);
+    } else {
+      res.writeHead(200, {
+        'Cache-Control': cacheControl,
+        'Content-Type': contentType,
+        'Cross-Origin-Opener-Policy': 'same-origin',
+        'Cross-Origin-Embedder-Policy': 'require-corp',
+      });
+      const stream = handle.createReadStream();
+      handle = null;
+      stream.on('error', () => res.destroy());
+      stream.pipe(res);
+    }
  } catch (error) {
+    console.error(error);
    res.writeHead(500);
-    res.end(error instanceof Error ? error.message : 'Internal server error');
+    res.end('Internal server error');
+  } finally {
+    if (handle) await handle.close().catch(() => {});
  }
 });

@@ -70,8 +70,20 @@ before(async () => {
  await waitForServer(serverPort);
 });

+function killAndWait(proc) {
+  return new Promise((resolve) => {
+    if (!proc || proc.exitCode !== null) {
+      resolve();
+      return;
+    }
+    proc.once('exit', resolve);
+    proc.kill();
+    if (proc.exitCode !== null) resolve();
+  });
+}
+
 after(async () => {
-  child?.kill();
+  await killAndWait(child);
  if (tmpDir) await rm(tmpDir, { recursive: true, force: true });
 });

@@ -100,8 +112,154 @@ it('rejects percent-encoded null bytes with 400', async () => {
  assert.equal(res.status, 400);
 });

+it('rejects percent-encoded path traversal with 400', async () => {
+  // %2e%2e%2f decodes to '../'. Without the path.relative inline barrier,
+  // a naive string check on the raw URL would let this through and only
+  // the lexical-decoded path.resolve would catch it. Confirm the barrier
+  // does its job after decodeURIComponent.
+  const res = await rawGet(serverPort, '/%2e%2e%2f%2e%2e%2fetc%2fpasswd');
+  assert.equal(res.status, 400);
+});
+
+it('rejects malformed percent-encoding with 400', async () => {
+  // %GG is not a valid percent-encoded sequence — decodeURIComponent throws.
+  // The handler's try/catch around decode must convert this to a 400 rather
+  // than an unhandled rejection.
+  const res = await rawGet(serverPort, '/foo%GGbar');
+  assert.equal(res.status, 400);
+});
+
 it('returns 404 when dist/index.html is missing', async () => {
  await unlink(join(tmpDir, 'dist', 'index.html'));
  const res = await rawGet(serverPort, '/nonexistent-page');
  assert.equal(res.status, 404);
 });
+
+// -- Config injection: server-level integration tests ---
+
+function spawnServerWithEnv(cwd, port, env) {
+  const proc = spawn(process.execPath, [serverScript], {
+    cwd,
+    env: { ...process.env, PORT: String(port), ...env },
+    stdio: 'pipe',
+  });
+  proc.on('error', (err) => {
+    throw err;
+  });
+  return proc;
+}
+
+async function withInjectionServer(envOverrides, fn) {
+  const dir = await mkdtemp(join(tmpdir(), 'gitnexus-inject-'));
+  const distDir = join(dir, 'dist');
+  const assetsDir = join(distDir, 'assets');
+  await mkdir(assetsDir, { recursive: true });
+  await writeFile(
+    join(distDir, 'index.html'),
+    '<!doctype html><html><head><meta charset="utf-8"></head><body>app</body></html>',
+  );
+  await writeFile(join(assetsDir, 'style.abc.css'), 'body{}');
+
+  const port = await getFreePort();
+  const proc = spawnServerWithEnv(dir, port, envOverrides);
+  try {
+    await waitForServer(port);
+    await fn(port);
+  } finally {
+    await killAndWait(proc);
+    await rm(dir, { recursive: true, force: true });
+  }
+}
+
+it('injects __GITNEXUS_CONFIG__ into / when GITNEXUS_BACKEND_URL is valid', async () => {
+  await withInjectionServer({ GITNEXUS_BACKEND_URL: 'http://10.0.0.1:4747' }, async (port) => {
+    const res = await rawGet(port, '/');
+    assert.equal(res.status, 200);
+    assert.ok(
+      res.body.includes('window.__GITNEXUS_CONFIG__'),
+      'Expected __GITNEXUS_CONFIG__ in response body',
+    );
+    assert.ok(res.body.includes('http://10.0.0.1:4747'), 'Expected backend URL in response body');
+  });
+});
+
+it('injects __GITNEXUS_CONFIG__ into SPA fallback routes', async () => {
+  await withInjectionServer({ GITNEXUS_BACKEND_URL: 'http://10.0.0.1:4747' }, async (port) => {
+    const res = await rawGet(port, '/some/deep/link');
+    assert.equal(res.status, 200);
+    assert.ok(
+      res.body.includes('window.__GITNEXUS_CONFIG__'),
+      'Expected __GITNEXUS_CONFIG__ in SPA fallback response',
+    );
+    assert.ok(
+      res.body.includes('http://10.0.0.1:4747'),
+      'Expected backend URL in SPA fallback response',
+    );
+  });
+});
+
+it('does not inject when GITNEXUS_BACKEND_URL is not set', async () => {
+  await withInjectionServer({}, async (port) => {
+    const res = await rawGet(port, '/');
+    assert.equal(res.status, 200);
+    assert.ok(
+      !res.body.includes('__GITNEXUS_CONFIG__'),
+      'Expected no __GITNEXUS_CONFIG__ when env var is unset',
+    );
+  });
+});
+
+it('does not inject when GITNEXUS_BACKEND_URL is invalid', async () => {
+  await withInjectionServer({ GITNEXUS_BACKEND_URL: 'not-a-url' }, async (port) => {
+    const res = await rawGet(port, '/');
+    assert.equal(res.status, 200);
+    assert.ok(
+      !res.body.includes('__GITNEXUS_CONFIG__'),
+      'Expected no __GITNEXUS_CONFIG__ for invalid URL',
+    );
+  });
+});
+
+it('does not inject when GITNEXUS_BACKEND_URL uses a non-http protocol', async () => {
+  await withInjectionServer({ GITNEXUS_BACKEND_URL: 'ftp://somehost:21' }, async (port) => {
+    const res = await rawGet(port, '/');
+    assert.equal(res.status, 200);
+    assert.ok(
+      !res.body.includes('__GITNEXUS_CONFIG__'),
+      'Expected no __GITNEXUS_CONFIG__ for non-http protocol',
+    );
+  });
+});
+
+it('escapes </script> in GITNEXUS_BACKEND_URL to prevent XSS', async () => {
+  const xssUrl = 'http://example.com/?x=</script><script>alert(1)</script>';
+  await withInjectionServer({ GITNEXUS_BACKEND_URL: xssUrl }, async (port) => {
+    const res = await rawGet(port, '/');
+    assert.equal(res.status, 200);
+
+    const scriptMatches = res.body.match(/<script>/gi) || [];
+    assert.equal(
+      scriptMatches.length,
+      1,
+      `Expected exactly 1 <script> tag but found ${scriptMatches.length}: XSS breakout detected`,
+    );
+
+    assert.ok(
+      !res.body.includes('</script><script>'),
+      '</script> must not appear unescaped -- would allow script breakout',
+    );
+    assert.ok(res.body.includes('\\u003c'), 'Angle brackets must be escaped as \\u003c');
+  });
+});
+
+it('does not inject config into static assets', async () => {
+  await withInjectionServer({ GITNEXUS_BACKEND_URL: 'http://10.0.0.1:4747' }, async (port) => {
+    const res = await rawGet(port, '/assets/style.abc.css');
+    assert.equal(res.status, 200);
+    assert.ok(
+      !res.body.includes('__GITNEXUS_CONFIG__'),
+      'Static assets must not contain injected config',
+    );
+    assert.equal(res.body, 'body{}');
+  });
+});
@@ -1,100 +0,0 @@
-# COBOL Code Indexing
-
-GitNexus indexes COBOL codebases using a **regex-only extraction** strategy, bypassing tree-sitter entirely. This document explains why, how the pipeline works, and links to detailed sub-documents.
-
-## Why Regex-Only?
-
-The tree-sitter-cobol grammar (v0.0.1) has three critical limitations that make it unusable for production indexing:
-
-| Issue | Impact | Severity |
-|-------|--------|----------|
-| External scanner hangs on ~5% of files | No timeout mechanism exists for the C scanner; the process blocks indefinitely | **Blocking** |
-| Only ~15% of paragraph headers detected | Most procedure-division paragraphs are invisible to the grammar | High |
-| Patch markers in cols 1-6 cause parse errors | Enterprise COBOL uses non-standard sequence area content (e.g., `mzADD`, `estero`, `#FIX`) | High |
-
-Because the external scanner hang cannot be interrupted (there is no `setTimeoutMicros` equivalent for tree-sitter), using tree-sitter-cobol would hang the indexing pipeline on a non-trivial fraction of real-world files.
-
-The regex-only approach provides:
-
- **Speed**: ~1ms per file average extraction time
- **Reliability**: zero hangs, zero crashes across 13,000+ files
- **Coverage**: captures all critical symbols -- program name, paragraphs, sections, CALL, PERFORM, COPY, data items (01-77, 88-level), file declarations, FD entries, EXEC SQL/CICS blocks, ENTRY points, and MOVE statements
-
-## Architecture
-
-```mermaid
-flowchart TD
-    A[Repository Scan] --> B{File Detection}
-    B -->|Extension match| C[COBOL file]
-    B -->|GITNEXUS_COBOL_DIRS match| C
-    B -->|No match| Z[Skip]
-
-    C --> D{Copybook?}
-    D -->|Yes| E[Add to Copybook Map]
-    D -->|No| F[Source Program]
-
-    E --> G[COPY Expansion Engine]
-    F --> G
-
-    G -->|Inline copybook content| H[Expanded Source]
-    H --> I[Patch Marker Cleanup]
-    I --> J[Regex State Machine]
-
-    J --> K[Extracted Symbols]
-    K --> L[Graph Model Builder]
-    L --> M[Knowledge Graph]
-
-    subgraph "Per-Chunk Processing"
-        G
-        H
-        I
-        J
-        K
-        L
-    end
-
-    subgraph "Post-Processing"
-        M --> N[Community Detection]
-        M --> O[Process Detection]
-        M --> P[Contract Detection]
-    end
-
-    style J fill:#e8f5e9,stroke:#2e7d32
-    style G fill:#e3f2fd,stroke:#1565c0
-```
-
-## COBOL vs Tree-Sitter Languages
-
-| Feature | COBOL (Regex) | Tree-Sitter Languages |
-|---------|--------------|----------------------|
-| Parser | Single-pass regex state machine | tree-sitter grammar + queries |
-| Speed | ~1ms/file | ~5ms/file |
-| AST available | No | Yes |
-| COPY expansion | Yes (pre-processing step) | N/A |
-| Deep indexing | Data items, SQL, CICS, FD, ENTRY | Type annotations, generics, etc. |
-| Call extraction | PERFORM (intra-file) + CALL (cross-program) | AST-based call site detection |
-| Import extraction | COPY statements | `import`/`require`/`use`/`#include` |
-| Coverage | All critical symbols | Language-dependent query coverage |
-| Failure mode | Never hangs | External scanner can hang (COBOL only) |
-
-## Sub-Documents
-
-| Document | Description |
-|----------|-------------|
-| [File Detection](./file-detection.md) | Extension mapping, `GITNEXUS_COBOL_DIRS`, copybook classification |
-| [COPY Expansion](./copy-expansion.md) | Copybook inlining, REPLACING transformations, cycle detection |
-| [Regex Extraction](./regex-extraction.md) | State machine, regex patterns, line processing |
-| [Deep Indexing](./deep-indexing.md) | Data items, EXEC SQL/CICS, file declarations, FD, ENTRY, MOVE |
-| [Graph Model](./graph-model.md) | COBOL-specific node types, edge types, full annotated example |
-| [Performance](./performance.md) | Benchmarks, worker pool tuning, caps, troubleshooting |
-
-## Key Source Files
-
-| File | Purpose |
-|------|---------|
-| `gitnexus/src/core/ingestion/cobol-preprocessor.ts` | Patch marker cleanup + regex extraction engine |
-| `gitnexus/src/core/ingestion/cobol-copy-expander.ts` | COPY statement expansion with REPLACING |
-| `gitnexus/src/core/ingestion/utils.ts` | `getLanguageFromPath`, `getLanguageFromFilename` |
-| `gitnexus/src/core/ingestion/pipeline.ts` | `isCobolCopybook`, `expandCobolCopies`, `detectCrossProgamContracts` |
-| `gitnexus/src/core/ingestion/workers/parse-worker.ts` | `processCobolRegexOnly` -- graph model builder |
-| `gitnexus/src/core/ingestion/workers/worker-pool.ts` | Configurable sub-batch size for COBOL |
@@ -1,157 +0,0 @@
-# COBOL COPY Expansion
-
-The COPY statement is COBOL's include mechanism -- analogous to `#include` in C or `import` in modern languages. GitNexus expands COPY statements **before** regex extraction so that symbols defined inside copybooks (data items, paragraphs, etc.) are visible in the program's extracted graph.
-
-## Supported Syntax
-
-### Basic COPY
-
-```cobol
-COPY CPSESP.
-COPY "WORKGRID.CPY".
-```
-
-Inlines the content of the named copybook, replacing the COPY line(s).
-
-### COPY with REPLACING
-
-```cobol
-COPY CPSESP REPLACING "ANAZI-KEY" BY "LK-KEY".
-COPY CPSESP REPLACING LEADING "ESP-" BY "LK-ESP-"
-                       LEADING "KPSESPL" BY "LK-KPSESPL".
-COPY LINKAGE REPLACING TRAILING "-IN" BY "-OUT".
-```
-
-Three REPLACING types are supported:
-
-| Type         | Syntax                               | Behavior                                | Example                          |
-| ------------ | ------------------------------------ | --------------------------------------- | -------------------------------- |
-| **EXACT**    | `REPLACING "OLD" BY "NEW"`           | Replace exact identifier matches        | `ANAZI-KEY` becomes `LK-KEY`     |
-| **LEADING**  | `REPLACING LEADING "PFX-" BY "NEW-"` | Replace prefix on all COBOL identifiers | `ESP-NAME` becomes `LK-ESP-NAME` |
-| **TRAILING** | `REPLACING TRAILING "-IN" BY "-OUT"` | Replace suffix on all COBOL identifiers | `DATA-IN` becomes `DATA-OUT`     |
-
-Multiple REPLACING clauses can appear in a single COPY statement. They are applied in order to each COBOL identifier in the copybook content.
-
-### Multi-Line COPY
-
-COPY statements can span multiple lines (standard COBOL continuation rules apply):
-
-```cobol
-       COPY CPSESP REPLACING
-      -    LEADING "ESP-" BY "LK-ESP-"
-      -    LEADING "KPSESPL" BY "LK-KPSESPL".
-```
-
-Continuation lines (indicator `-` in column 7) are merged before COPY statement scanning.
-
-## Expansion Flow
-
-```mermaid
-sequenceDiagram
-    participant Pipeline
-    participant Expander as COPY Expander
-    participant Resolver
-    participant Reader
-
-    Pipeline->>Pipeline: Identify all COBOL files
-    Pipeline->>Pipeline: Classify copybooks vs programs
-    Pipeline->>Reader: Read all copybook content upfront
-    Reader-->>Pipeline: Copybook content map (name -> content)
-
-    loop For each source file in chunk
-        Pipeline->>Expander: expandCopies(content, filePath, resolveFile, readFile)
-        Expander->>Expander: Merge continuation lines
-        Expander->>Expander: Detect COPY statements via regex
-
-        loop For each COPY statement (reverse order)
-            Expander->>Resolver: resolveFile(copyTarget)
-            Resolver-->>Expander: Copybook key or null
-
-            alt Resolved successfully
-                Expander->>Reader: readFile(resolvedKey)
-                Reader-->>Expander: Copybook content
-
-                Expander->>Expander: Apply REPLACING transformations
-                Expander->>Expander: Recurse for nested COPYs (depth + 1)
-                Expander->>Expander: Splice expanded content into output
-            else Not resolved
-                Expander->>Expander: Keep original COPY line
-            end
-        end
-
-        Expander-->>Pipeline: Expanded content + resolution metadata
-        Pipeline->>Pipeline: Replace file content with expanded content
-    end
-```
-
-The return type `CopyExpansionResult` contains `expandedContent` and `copyResolutions`. The `expansionDepth` field has been removed from the return type (it was unused by callers).
-
-COPY statement line numbers in `CopyResolution` are 1-based (consistent with the preprocessor's line numbering). The splice operation that replaces COPY lines with expanded content adjusts for 0-based array indexing internally.
-
-## Cycle Detection
-
-Circular COPY references (e.g., copybook A includes copybook B which includes copybook A) are detected and handled:
-
-1. Each expansion chain maintains a `visited` set of resolved copybook paths
-2. If a copybook path is already in the visited set, the expansion is skipped
-3. A `warnedCircular` set (internal to `expandCopies()`, not a parameter) deduplicates warning messages within a single file expansion
-
-Known circular copybooks in PROJECT-NAME: `ANAZI`, `ANDIP`, `QDIPE` (self-referential includes).
-
-## Max Depth
-
-Nested COPY expansion is limited to **10 levels** (`DEFAULT_MAX_DEPTH`). If a COPY chain exceeds this depth, a warning is logged and the remaining COPY statements are left unexpanded.
-
-## Max Total Expansions
-
-A breadth amplification guard caps the total number of COPY expansions across all branches within a single file to **500** (`MAX_TOTAL_EXPANSIONS`). This prevents exponential blowup from diamond-shaped COPY graphs where N copybooks each include N other copybooks. Once the limit is reached, further COPY statements in that file are left unexpanded and a single warning is logged.
-
-## REPLACING Application Detail
-
-The REPLACING engine works by scanning all COBOL identifiers (matching `\b[A-Z][A-Z0-9-]*\b`) in the copybook content and applying each replacement rule:
-
-```
-Original copybook content:
-       05  ESP-NAME          PIC X(30).
-       05  ESP-CODE          PIC X(10).
-       05  KPSESPL-FLAG      PIC X(01).
-
-After REPLACING LEADING "ESP-" BY "LK-ESP-" LEADING "KPSESPL" BY "LK-KPSESPL":
-       05  LK-ESP-NAME       PIC X(30).
-       05  LK-ESP-CODE       PIC X(10).
-       05  LK-KPSESPL-FLAG   PIC X(01).
-```
-
-For LEADING replacements, the engine checks if each identifier starts with the `from` prefix (case-insensitive) and replaces only the prefix portion, preserving the rest of the identifier.
-
-For TRAILING replacements, the same logic applies to suffixes.
-
-For EXACT replacements, only identifiers that match the `from` value exactly (case-insensitive) are replaced.
-
-## Copybook Resolution
-
-The resolver tries multiple strategies to match a COPY target name to a copybook file:
-
-1. **Exact match**: `COPY CPSESP` resolves to copybook named `CPSESP`
-2. **Strip extension**: `COPY WORKGRID.CPY` strips `.CPY` and resolves to `WORKGRID`
-3. **Add extension**: `COPY CPSESP` tries `CPSESP.CPY` and `CPSESP.COPY`
-
-If no match is found, the COPY statement is left in place (unexpanded) and a resolution record with `resolvedPath: null` is created.
-
-## Pipeline Integration
-
-The expansion runs **per chunk**, after file content is read but before dispatch to worker threads:
-
-1. All copybook files are read upfront (they are typically small, collectively under 100MB)
-2. Per chunk, the copybook map is merged with chunk content (in case a chunk contains copybooks)
-3. Only programs (not copybooks themselves) undergo expansion
-4. The expanded content replaces the original content in-place before worker dispatch
-
-## Inline Comment Handling
-
-The copy expander's `stripInlineComment()` helper is quote-aware: pipe characters (`|`) inside single- or double-quoted strings are preserved. This matches the same quote-aware logic used by the preprocessor.
-
-## Source Files
-
- `gitnexus/src/core/ingestion/cobol-copy-expander.ts` -- `expandCopies()`, `parseReplacingClause()`, `applyReplacing()`
- `gitnexus/src/core/ingestion/pipeline.ts` -- `expandCobolCopies()`, copybook map construction, chunk integration
@@ -1,312 +0,0 @@
-# COBOL Deep Indexing
-
-Beyond basic symbol extraction (program name, paragraphs, CALL, PERFORM, COPY), GitNexus performs deep indexing of COBOL-specific constructs: data items, EXEC SQL/CICS blocks, file declarations, FD entries, ENTRY points, and MOVE statements.
-
-## Data Items
-
-### Level Numbers
-
-| Level Range | Meaning | Graph Node Type |
-|-------------|---------|-----------------|
-| 01 | Record (group item) | `Record` |
-| 02-49 | Elementary/group items | `Property` |
-| 66 | RENAMES | `Property` |
-| 77 | Independent item | `Property` |
-| 88 | Condition name | `Const` |
-
-FILLER items are skipped (no useful name for the graph).
-
-### Clauses Parsed
-
-The `parseDataItemClauses()` function extracts these clauses from the trailing text of a data item declaration:
-
-| Clause | Pattern | Example |
-|--------|---------|---------|
-| `PIC` / `PICTURE` | `\bPIC(?:TURE)?\s+(?:IS\s+)?(\S+)` | `PIC X(30)`, `PICTURE IS 9(5)V99` |
-| `USAGE` | `\bUSAGE\s+(?:IS\s+)?(COMP\|BINARY\|...)` | `USAGE IS COMP-3`, `BINARY` |
-| `REDEFINES` | `\bREDEFINES\s+([A-Z][A-Z0-9-]+)` | `REDEFINES WK-DATE-NUM` |
-| `OCCURS` | `\bOCCURS\s+(\d+)` | `OCCURS 12 TIMES` |
-
-Standalone COMP variants (without the `USAGE` keyword) are also detected: `COMP`, `COMP-1` through `COMP-6`, `COMP-X`, `BINARY`, `PACKED-DECIMAL`.
-
-### Data Hierarchy
-
-Data items form a hierarchical structure based on level numbers. The extractor uses a **stack algorithm**:
-
-```
-Processing order:
-  01 WK-RECORD          -> push {01, WK-RECORD}   -> parent: Module
-  05 WK-NAME            -> push {05, WK-NAME}     -> parent: WK-RECORD (01 < 05)
-  10 WK-FIRST           -> push {10, WK-FIRST}    -> parent: WK-NAME (05 < 10)
-  10 WK-LAST            -> pop WK-FIRST, push      -> parent: WK-NAME (05 < 10)
-  05 WK-CODE            -> pop WK-LAST, WK-NAME    -> parent: WK-RECORD (01 < 05)
-  88 WK-ACTIVE          -> (88 handled separately)  -> parent: WK-CODE
-```
-
-The stack maintains items where each entry's level is strictly less than the next. When a new item arrives with a level <= the top of stack, items are popped until the stack top has a smaller level. A `CONTAINS` edge is created from the stack top to the new item.
-
-For 88-level condition names, the parent is the immediately preceding non-88 data item (found by scanning backwards).
-
-### Annotated Example
-
-```cobol
-       01  WK-EMPLOYEE.
-           05  WK-EMP-ID          PIC 9(6).
-           05  WK-EMP-NAME        PIC X(30).
-           05  WK-EMP-STATUS      PIC X(01).
-               88  WK-ACTIVE      VALUE "A".
-               88  WK-INACTIVE    VALUE "I".
-           05  WK-SALARY          PIC 9(7)V99 COMP-3.
-           05  WK-DEPT            PIC X(04) OCCURS 3 TIMES.
-```
-
-Produces:
- `Record` node: `WK-EMPLOYEE` (level 01, section: working-storage)
- `Property` nodes: `WK-EMP-ID`, `WK-EMP-NAME`, `WK-EMP-STATUS`, `WK-SALARY`, `WK-DEPT`
- `Const` nodes: `WK-ACTIVE` (values: `A`), `WK-INACTIVE` (values: `I`)
- `CONTAINS` edges: `WK-EMPLOYEE -> WK-EMP-ID`, `WK-EMPLOYEE -> WK-EMP-NAME`, etc.
- `CONTAINS` edges: `WK-EMP-STATUS -> WK-ACTIVE`, `WK-EMP-STATUS -> WK-INACTIVE`
-
-### Data Item Cap
-
-A maximum of **500 data items per file** (`MAX_DATA_ITEMS_PER_FILE`) are processed. Some COBOL programs (especially after COPY expansion) can have 10,000+ data items, which would cause graph bloat and push the V8 relationship Map past its 16.7M entry limit across thousands of files.
-
-The cap applies after extraction: the first 500 items in source order are kept. Since 01-level records appear first, critical top-level structure is preserved.
-
-## EXEC SQL
-
-EXEC SQL blocks are accumulated across lines between `EXEC SQL` and `END-EXEC`, then parsed as a unit.
-
-### Operation Classification
-
-The first SQL keyword determines the operation:
-
-| First Keyword | Operation |
-|---------------|-----------|
-| `SELECT` | SELECT |
-| `INSERT` | INSERT |
-| `UPDATE` | UPDATE |
-| `DELETE` | DELETE |
-| `DECLARE` | DECLARE |
-| `OPEN` | OPEN |
-| `CLOSE` | CLOSE |
-| `FETCH` | FETCH |
-| *(anything else)* | OTHER |
-
-### Table Extraction
-
-Tables are extracted from SQL clauses:
-
-| Clause Pattern | Example |
-|----------------|---------|
-| `FROM <table>` | `SELECT * FROM EMPLOYEES` |
-| `INSERT INTO <table>` | `INSERT INTO EMPLOYEES` |
-| `UPDATE <table>` | `UPDATE EMPLOYEES SET ...` |
-| `JOIN <table>` | `LEFT JOIN DEPARTMENTS ON ...` |
-
-Note: The `INTO` pattern is restricted to `INSERT INTO` to avoid false positives from `FETCH ... INTO :host-var` and `SELECT ... INTO :host-var` statements, where `INTO` introduces host variables rather than table names.
-
-### Cursor Detection
-
-```cobol
-           EXEC SQL
-               DECLARE C-EMPLOYEES CURSOR FOR
-               SELECT EMP-ID, EMP-NAME FROM EMPLOYEES
-               WHERE DEPT = :WK-DEPT
-           END-EXEC
-```
-
-Extracts: cursor `C-EMPLOYEES`, table `EMPLOYEES`, host variable `WK-DEPT`.
-
-### Host Variables
-
-Host variables are COBOL variables referenced in SQL with a `:` prefix. The colon is stripped:
-
-```sql
-WHERE EMP-ID = :WK-EMP-ID AND DEPT = :WK-DEPT
-```
-
-Extracts: `WK-EMP-ID`, `WK-DEPT`.
-
-### Graph Output
-
- `CodeElement` node per table, with description `sql-table op:{OP}`
- `CodeElement` node per cursor, with description `sql-cursor`
- `ACCESSES` edge from Module to each CodeElement
- Deduplication: if the same table appears in multiple SQL blocks, only one node is created
-
-## EXEC CICS
-
-EXEC CICS blocks are accumulated and parsed similarly to SQL blocks.
-
-### Command Detection
-
-Two-word commands are detected first (matched against the block start):
-
-```
-SEND MAP, RECEIVE MAP, SEND TEXT, SEND CONTROL, READ NEXT, READ PREV
-```
-
-If no two-word command matches, the first word is used (e.g., `LINK`, `XCTL`, `RETURN`, `READ`, `WRITE`).
-
-### Extraction
-
-| Element | Pattern | Example |
-|---------|---------|---------|
-| MAP name | `MAP('name')` or `MAP("name")` | `EXEC CICS SEND MAP('EMPMENU')` |
-| PROGRAM name | `PROGRAM('name')` or `PROGRAM("name")` | `EXEC CICS LINK PROGRAM('BGTABUP')` |
-| TRANSID | `TRANSID('name')` or `TRANSID("name")` | `EXEC CICS START TRANSID('EMP1')` |
-
-### Graph Output
-
- MAP: `CodeElement` node with description `cics-map cmd:{CMD}` + `ACCESSES` edge from Module
- PROGRAM: `CALLS` edge (cross-program call via CICS LINK/XCTL)
- TRANSID: `CodeElement` node with description `cics-transid cmd:{CMD}` + `ACCESSES` edge from Module
-
-### Annotated Example
-
-```cobol
-           EXEC CICS
-               SEND MAP('EMPMENU')
-               MAPSET('EMPSET')
-               FROM(WK-MAP-DATA)
-               ERASE
-           END-EXEC
-```
-
-Produces:
- `CodeElement` node: `EMPMENU` (description: `cics-map cmd:SEND MAP`)
- `ACCESSES` edge: Module -> `EMPMENU`
-
-## File Declarations
-
-SELECT statements in the INPUT-OUTPUT SECTION are accumulated across multiple lines (until a period terminator) and parsed for:
-
-| Clause | Pattern | Example |
-|--------|---------|---------|
-| SELECT | `SELECT <name>` | `SELECT MASTER-FILE` |
-| ASSIGN | `ASSIGN TO <file>` | `ASSIGN TO "MASTER.DAT"` |
-| ORGANIZATION | `ORGANIZATION IS <type>` | `ORGANIZATION IS INDEXED` |
-| ACCESS | `ACCESS MODE IS <mode>` | `ACCESS MODE IS DYNAMIC` |
-| RECORD KEY | `RECORD KEY IS <field>` | `RECORD KEY IS WK-EMP-ID` |
-| FILE STATUS | `FILE STATUS IS <field>` | `FILE STATUS IS WK-FILE-STATUS` |
-
-### Graph Output
-
- `CodeElement` node with description containing all parsed clauses (e.g., `select org:INDEXED access:DYNAMIC key:WK-EMP-ID status:WK-FILE-STATUS assign:MASTER.DAT`)
- `RECORD_KEY_OF` edge: from Property node to CodeElement (confidence 0.8)
- `FILE_STATUS_OF` edge: from Property node to CodeElement (confidence 0.8)
-
-## FD Entries
-
-FD (File Description) entries associate a file name with its record layout:
-
-```cobol
-       FD  MASTER-FILE.
-       01  MASTER-RECORD.
-           05  MR-EMP-ID       PIC 9(6).
-           05  MR-EMP-NAME     PIC X(30).
-```
-
-The extractor tracks `pendingFdName` state: when an `FD` line is seen, the next 01-level data item becomes its record.
-
-### Graph Output
-
- `CodeElement` node with description `fd record:{recordName}`
- `CONTAINS` edge: FD CodeElement -> Record node
- `CONTAINS` edge: SELECT CodeElement -> FD CodeElement (linking file declaration to file description)
-
-## ENTRY Points
-
-The `ENTRY` statement defines additional entry points into a COBOL program (in addition to the main program entry):
-
-```cobol
-       ENTRY "SUBPROG" USING WK-PARAM-1 WK-PARAM-2.
-```
-
-### Graph Output
-
- `Constructor` node with description `entry params:{param1},{param2}` (or just `entry` if no parameters)
- `CONTAINS` edge: Module -> Constructor
- Symbol table entry (so the entry point is discoverable by name)
-
-## PROCEDURE DIVISION USING
-
-```cobol
-       PROCEDURE DIVISION USING WK-INPUT-REC WK-OUTPUT-REC.
-```
-
-The USING clause identifies parameters received by the program from its caller.
-
-### Graph Output
-
- `RECEIVES` edge: Module -> Property (for each parameter name, confidence 0.8)
-
-## MOVE Statements
-
-MOVE statements produce `ACCESSES` edges in the graph:
-
-```cobol
-       MOVE WK-NAME TO OUT-NAME.
-       MOVE CORRESPONDING WK-INPUT TO WK-OUTPUT.
-       MOVE CORR WK-IN TO WK-OUT.
-```
-
-### Extraction Details
-
- Source and target identifiers are captured
- `CORRESPONDING` and its abbreviation `CORR` are both recognized (bulk field-by-field move)
- Figurative constants (SPACES, ZEROS, LOW-VALUES, HIGH-VALUES, QUOTES, ALL) are skipped
- The enclosing paragraph (`caller`) is tracked for context
-
-### MOVE CORRESPONDING / CORR Edge Reasons
-
-MOVE CORRESPONDING (and CORR) produces distinct edge reasons to differentiate from simple MOVE:
-
-| Edge | Reason (simple MOVE) | Reason (CORRESPONDING/CORR) |
-|------|---------------------|-----------------------------|
-| Read (source) | `cobol-move-read` | `cobol-move-corresponding-read` |
-| Write (target) | `cobol-move-write` | `cobol-move-corresponding-write` |
-
-This distinction allows queries to find bulk field-by-field moves separately from simple variable assignments.
-
-## GO TO DEPENDING ON
-
-The `GO TO` statement with multiple targets and a `DEPENDING ON` clause is a computed branch:
-
-```cobol
-       GO TO PARA-1 PARA-2 PARA-3
-           DEPENDING ON WK-SELECTOR.
-```
-
-All target paragraph names are extracted and emitted as separate `gotos` entries. Each target produces a `CALLS` edge in the graph (same semantics as PERFORM). The `DEPENDING ON` variable is not currently tracked as a data-flow dependency.
-
-## SORT INPUT/OUTPUT PROCEDURE
-
-SORT and MERGE statements can specify procedural entry points instead of file-based I/O:
-
-```cobol
-       SORT SORT-FILE ON ASCENDING KEY SORT-KEY
-           INPUT PROCEDURE IS PREPARE-INPUT
-           OUTPUT PROCEDURE IS FORMAT-OUTPUT.
-```
-
-`INPUT PROCEDURE IS` and `OUTPUT PROCEDURE IS` targets are extracted as control-flow targets (same as PERFORM). They produce `performs` entries and corresponding `CALLS` edges in the graph.
-
-## Fixed-Format Literal Continuation
-
-In fixed-format COBOL, string literals can span multiple lines using the continuation indicator (`-` in column 7). When a continuation line starts with a quote character, the extractor joins it with the predecessor by removing the trailing quote from the previous line and the opening quote from the continuation:
-
-```
-Line N:          MOVE "THIS IS A LONG STRI
-Line N+1 (cont): -    "NG VALUE" TO WK-FIELD.
-Merged:          MOVE "THIS IS A LONG STRING VALUE" TO WK-FIELD.
-```
-
-The trailing `"` on line N and the opening `"` on line N+1 are both removed, producing a seamless literal. If no matching quote is found on the predecessor line, the continuation is appended as-is.
-
-## Source Files
-
- `gitnexus/src/core/ingestion/cobol-preprocessor.ts` -- All extraction logic, clause parsers, EXEC block parsers
- `gitnexus/src/core/ingestion/workers/parse-worker.ts` -- `processCobolRegexOnly()`, graph node/edge emission
- `gitnexus/src/core/ingestion/parsing-processor.ts` -- Sequential fallback with same `MAX_DATA_ITEMS_PER_FILE` cap
@@ -1,126 +0,0 @@
-# COBOL File Detection
-
-GitNexus detects COBOL files through two mechanisms: extension-based mapping and directory-based override for extensionless files. This document covers both, plus the copybook/program classification logic.
-
-## Extension Mapping
-
-### Program Extensions
-
-| Extension | Type |
-|-----------|------|
-| `.cbl` | COBOL program |
-| `.cob` | COBOL program |
-| `.cobol` | COBOL program |
-
-### Copybook Extensions
-
-| Extension | Type | Notes |
-|-----------|------|-------|
-| `.cpy` | Copybook | Standard |
-| `.copy` | Copybook | Standard |
-| `.gnm` / `.GNM` | Copybook | Enterprise (GnuCOBOL naming) |
-| `.fd` / `.FD` | Copybook | File Description fragment |
-| `.wrk` / `.WRK` | Copybook | Working-Storage fragment |
-| `.sel` / `.SEL` | Copybook | SELECT clause fragment |
-| `.open` / `.OPEN` | Copybook | File OPEN fragment |
-| `.close` / `.CLOSE` | Copybook | File CLOSE fragment |
-| `.ini` / `.INI` | Copybook | Initialization fragment |
-| `.def` / `.DEF` | Copybook | Definition fragment |
-
-All extension matching is case-sensitive in `getLanguageFromFilename` (the extensions above are matched as written, including uppercase variants like `.GNM`).
-
-## Extensionless File Detection: `GITNEXUS_COBOL_DIRS`
-
-Many enterprise COBOL repositories use extensionless files -- the filename alone identifies the program (e.g., `s/BGTABFL` is the source for program `BGTABFL`). GitNexus handles this via the `GITNEXUS_COBOL_DIRS` environment variable.
-
-### Configuration
-
-Set `GITNEXUS_COBOL_DIRS` to a comma-separated list of directory names:
-
-```bash
-# Files in s/, c/, and wfproc/ directories (at any depth) are treated as COBOL
-export GITNEXUS_COBOL_DIRS=s,c,wfproc
-```
-
-The matching is **case-insensitive** and checks all path segments:
-
- `/repo/s/BGTABFL` -- matches segment `s` -- COBOL
- `/repo/src/c/CPSESP` -- matches segment `c` -- COBOL
- `/repo/wfproc/WF001` -- matches segment `wfproc` -- COBOL
- `/repo/docs/README` -- no matching segment -- skipped
-
-### Decision Tree
-
-```mermaid
-flowchart TD
-    A[getLanguageFromPath] --> B[getLanguageFromFilename]
-    B --> C{Known extension?}
-    C -->|Yes .cbl/.cob/.cobol/.cpy/...| D[Return COBOL]
-    C -->|Yes .ts/.py/.java/...| E[Return other language]
-    C -->|No match| F{Has extension?}
-
-    F -->|"Has dot in basename"| G[Return null]
-    F -->|"No dot = extensionless"| H{GITNEXUS_COBOL_DIRS set?}
-
-    H -->|No| G
-    H -->|Yes| I{Any path segment<br/>matches a configured dir?}
-
-    I -->|Yes| D
-    I -->|No| G
-
-    style D fill:#e8f5e9,stroke:#2e7d32
-    style G fill:#ffebee,stroke:#c62828
-```
-
-### Implementation Detail
-
-The `GITNEXUS_COBOL_DIRS` value is parsed once (on first call) and cached in a `Set<string>`:
-
-```typescript
-// From gitnexus/src/core/ingestion/utils.ts
-const getCobolDirs = (): Set<string> => {
-  if (_cobolDirs) return _cobolDirs;
-  const raw = process.env.GITNEXUS_COBOL_DIRS;
-  _cobolDirs = raw
-    ? new Set(raw.split(',').map(d => d.trim().toLowerCase()))
-    : new Set();
-  return _cobolDirs;
-};
-```
-
-The path segment check splits the full path on `/` and tests each segment against the cached set.
-
-## Copybook vs Program Classification
-
-After a file is identified as COBOL, it must be classified as either a **program** (to be parsed for symbols) or a **copybook** (to be loaded into the copybook map for COPY expansion).
-
-### Classification Rules
-
-A COBOL file is classified as a **copybook** if ANY of these conditions is true:
-
-1. It has a recognized copybook extension (`.cpy`, `.copy`, `.gnm`, `.fd`, `.wrk`, `.sel`, `.open`, `.close`, `.ini`, `.def`)
-2. It is an extensionless file whose path contains a directory segment matching one of: `c`, `copy`, `copybooks`, `copylib`, `cpy`
-
-A file is classified as a **program** if:
-
-1. It has a program extension (`.cbl`, `.cob`, `.cobol`), OR
-2. It is extensionless and does NOT match any copybook directory pattern
-
-### Copybook Name Resolution
-
-Copybook names are derived from the filename:
-
- Strip the extension (if any)
- Convert to uppercase
-
-Examples:
- `c/CPSESP` -- name: `CPSESP`
- `copy/workgrid.cpy` -- name: `WORKGRID`
- `c/ANAZI.GNM` -- name: `ANAZI`
-
-This name is used to resolve `COPY CPSESP.` statements during expansion.
-
-## Source Files
-
- `gitnexus/src/core/ingestion/utils.ts` -- `getLanguageFromPath()`, `getLanguageFromFilename()`, `getCobolDirs()`
- `gitnexus/src/core/ingestion/pipeline.ts` -- `isCobolCopybook()`, `getCopybookName()`, `COPYBOOK_EXTENSIONS`, `COBOL_PROGRAM_EXTENSIONS`
@@ -1,193 +0,0 @@
-# COBOL Graph Model
-
-This document describes the graph nodes and edges that GitNexus creates for COBOL codebases. The COBOL graph model is richer than most tree-sitter languages because it captures domain-specific constructs: file declarations, FD entries, data hierarchies, SQL tables, CICS maps, and cross-program contracts.
-
-## Entity-Relationship Diagram
-
-```mermaid
-erDiagram
-    File ||--o{ Module : DEFINES
-    File ||--o{ Function : DEFINES
-    File ||--o{ Namespace : DEFINES
-    File ||--o{ Record : DEFINES
-    File ||--o{ Property : DEFINES
-    File ||--o{ Const : DEFINES
-    File ||--o{ CodeElement : DEFINES
-    File ||--o{ Constructor : DEFINES
-    File }o--o{ File : IMPORTS
-
-    Module ||--o{ Record : CONTAINS
-    Module ||--o{ Constructor : CONTAINS
-    Module }o--o{ CodeElement : ACCESSES
-    Module }o--o{ Module : CALLS
-    Module }o--o{ Module : CONTRACTS
-    Module }o--o{ Property : RECEIVES
-
-    Record ||--o{ Property : CONTAINS
-    Record ||--o{ Const : CONTAINS
-    Record }o--o{ Record : REDEFINES
-
-    Property ||--o{ Property : CONTAINS
-    Property ||--o{ Const : CONTAINS
-    Property }o--o{ Property : REDEFINES
-    Property }o--o{ CodeElement : RECORD_KEY_OF
-    Property }o--o{ CodeElement : FILE_STATUS_OF
-
-    CodeElement ||--o{ CodeElement : CONTAINS
-    CodeElement ||--o{ Record : CONTAINS
-
-    Function }o--o{ Function : CALLS
-```
-
-## Node Types
-
-| Node Type | COBOL Concept | Created From | Example |
-|-----------|--------------|--------------|---------|
-| `Module` | PROGRAM-ID | `PROGRAM-ID. BGTABFL` | Name: `BGTABFL`, description may include author and date |
-| `Function` | Paragraph | `PROCESS-RECORD.` at column 8 | Name: `PROCESS-RECORD` |
-| `Namespace` | Procedure section | `MAIN-LOGIC SECTION.` at column 8 | Name: `MAIN-LOGIC` |
-| `Record` | 01-level data item | `01 WK-EMPLOYEE.` | Description: `level:01 section:working-storage` |
-| `Property` | 02-49/66/77 data item | `05 WK-NAME PIC X(30).` | Description: `level:05 pic:X(30) section:working-storage` |
-| `Const` | 88-level condition | `88 WK-ACTIVE VALUE "A".` | Description: `level:88 values:A` |
-| `CodeElement` | SELECT, FD, SQL table, CICS map, cursor, transid | Various | Description varies by subtype |
-| `Constructor` | ENTRY point | `ENTRY "SUBPROG" USING WK-DATA` | Description: `entry params:WK-DATA` |
-
-### CodeElement Subtypes
-
-CodeElement is used for multiple COBOL constructs, distinguished by their description prefix:
-
-| Subtype | ID Pattern | Description Format | Example |
-|---------|-----------|-------------------|---------|
-| File SELECT | `CodeElement:{path}:SELECT:{name}` | `select org:INDEXED access:DYNAMIC ...` | `SELECT MASTER-FILE` |
-| FD entry | `CodeElement:{path}:FD:{name}` | `fd record:{recordName}` | `FD MASTER-FILE` |
-| SQL table | `CodeElement:{path}:sql-table:{name}` | `sql-table op:SELECT` | Table `EMPLOYEES` |
-| SQL cursor | `CodeElement:{path}:sql-cursor:{name}` | `sql-cursor` | Cursor `C-EMPLOYEES` |
-| CICS map | `CodeElement:{path}:cics-map:{name}` | `cics-map cmd:SEND MAP` | Map `EMPMENU` |
-| CICS transid | `CodeElement:{path}:cics-transid:{name}` | `cics-transid cmd:START` | Transid `EMP1` |
-
-## Edge Types
-
-| Edge Type | Source | Target | Created By | Confidence | Example |
-|-----------|--------|--------|-----------|------------|---------|
-| `DEFINES` | File | any node | File defines its symbols | 1.0 | File -> Module `BGTABFL` |
-| `CALLS` | Function | Function | `PERFORM X [THRU Y]` | (via call-processor) | `PROCESS-RECORD` -> `CALC-TAX` |
-| `CALLS` | Module | Module | `CALL "BGTABUP"` | (via call-processor) | `BGTABFL` -> `BGTABUP` |
-| `CALLS` | Module | Module | `EXEC CICS LINK PROGRAM('X')` | (via call-processor) | `BGTABFL` -> `BGTABUP` |
-| `IMPORTS` | File | File | `COPY copybook` | (via import-processor) | Source file -> Copybook file |
-| `CONTAINS` | Module | Record | Data hierarchy root | 1.0 | `BGTABFL` -> `WK-EMPLOYEE` |
-| `CONTAINS` | Record | Property | Data hierarchy | 1.0 | `WK-EMPLOYEE` -> `WK-NAME` |
-| `CONTAINS` | Property | Property | Nested data items | 1.0 | `WK-ADDRESS` -> `WK-CITY` |
-| `CONTAINS` | Record/Property | Const | 88-level parent | 1.0 | `WK-STATUS` -> `WK-ACTIVE` |
-| `CONTAINS` | CodeElement (FD) | Record | FD record link | 1.0 | `FD:MASTER-FILE` -> `MASTER-RECORD` |
-| `CONTAINS` | CodeElement (SELECT) | CodeElement (FD) | SELECT-FD link | 0.9 | `SELECT:MASTER-FILE` -> `FD:MASTER-FILE` |
-| `CONTAINS` | Module | Constructor | ENTRY in module | 1.0 | `BGTABFL` -> `SUBPROG` |
-| `REDEFINES` | Record | Record | `01 X REDEFINES Y` | 1.0 | `WK-DATE-NUM` -> `WK-DATE-ALPHA` |
-| `REDEFINES` | Property | Property | `05 X REDEFINES Y` | 1.0 | `WK-CODE-NUM` -> `WK-CODE-ALPHA` |
-| `RECORD_KEY_OF` | Property | CodeElement (SELECT) | `RECORD KEY IS field` | 0.8 | `WK-EMP-ID` -> `SELECT:MASTER-FILE` |
-| `FILE_STATUS_OF` | Property | CodeElement (SELECT) | `FILE STATUS IS field` | 0.8 | `WK-FS` -> `SELECT:MASTER-FILE` |
-| `ACCESSES` | Module | CodeElement | EXEC SQL/CICS | 0.9 | `BGTABFL` -> `sql-table:EMPLOYEES` |
-| `RECEIVES` | Module | Property | `PROCEDURE USING` | 0.8 | `BGTABFL` -> `WK-INPUT-REC` |
-| `CONTRACTS` | Module | Module | Shared copybook detection | 0.9 | `BGTABFL` -> `BGTABUP` (via `CPSESP`) |
-
-## Full Annotated Example
-
-Given this COBOL program:
-
-```cobol
-       IDENTIFICATION DIVISION.
-       PROGRAM-ID. EMPMAINT.
-       AUTHOR. Development Team.
-
-       ENVIRONMENT DIVISION.
-       INPUT-OUTPUT SECTION.
-       FILE-CONTROL.
-           SELECT EMP-FILE
-               ASSIGN TO "EMPLOYEE.DAT"
-               ORGANIZATION IS INDEXED
-               ACCESS MODE IS DYNAMIC
-               RECORD KEY IS EMP-ID
-               FILE STATUS IS WS-FILE-STATUS.
-
-       DATA DIVISION.
-       FILE SECTION.
-       FD  EMP-FILE.
-       01  EMP-RECORD.
-           05  EMP-ID             PIC 9(6).
-           05  EMP-NAME           PIC X(30).
-
-       WORKING-STORAGE SECTION.
-       01  WS-FLAGS.
-           05  WS-FILE-STATUS     PIC X(02).
-           05  WS-EOF-FLAG        PIC X(01).
-               88  WS-EOF         VALUE "Y".
-
-       LINKAGE SECTION.
-       01  LK-SEARCH-KEY          PIC 9(6).
-
-       PROCEDURE DIVISION USING LK-SEARCH-KEY.
-       MAIN-LOGIC SECTION.
-       MAIN-START.
-           PERFORM OPEN-FILE
-           PERFORM PROCESS-RECORDS
-           PERFORM CLOSE-FILE
-           STOP RUN.
-
-       OPEN-FILE.
-           OPEN I-O EMP-FILE.
-
-       PROCESS-RECORDS.
-           MOVE LK-SEARCH-KEY TO EMP-ID
-           EXEC SQL
-               SELECT EMP_SALARY INTO :WS-SALARY
-               FROM EMPLOYEES
-               WHERE EMP_ID = :EMP-ID
-           END-EXEC
-           CALL "EMPREPORT".
-
-       CLOSE-FILE.
-           CLOSE EMP-FILE.
-```
-
-The graph produced contains:
-
-**Nodes:**
- `Module`: EMPMAINT (description: `author:Development Team`)
- `Namespace`: MAIN-LOGIC
- `Function`: MAIN-START, OPEN-FILE, PROCESS-RECORDS, CLOSE-FILE
- `Record`: EMP-RECORD, WS-FLAGS, LK-SEARCH-KEY
- `Property`: EMP-ID, EMP-NAME, WS-FILE-STATUS, WS-EOF-FLAG
- `Const`: WS-EOF (values: Y)
- `CodeElement`: SELECT:EMP-FILE, FD:EMP-FILE, sql-table:EMPLOYEES
- (COPY imports, if any, would produce File IMPORTS edges)
-
-**Edges:**
- `DEFINES`: File -> all nodes
- `CONTAINS`: EMPMAINT -> EMP-RECORD, EMPMAINT -> WS-FLAGS, EMPMAINT -> LK-SEARCH-KEY
- `CONTAINS`: EMP-RECORD -> EMP-ID, EMP-RECORD -> EMP-NAME
- `CONTAINS`: WS-FLAGS -> WS-FILE-STATUS, WS-FLAGS -> WS-EOF-FLAG
- `CONTAINS`: WS-EOF-FLAG -> WS-EOF
- `CONTAINS`: FD:EMP-FILE -> EMP-RECORD
- `CONTAINS`: SELECT:EMP-FILE -> FD:EMP-FILE
- `CALLS`: MAIN-START -> OPEN-FILE, MAIN-START -> PROCESS-RECORDS, MAIN-START -> CLOSE-FILE
- `CALLS`: EMPMAINT -> EMPREPORT (external CALL)
- `ACCESSES`: EMPMAINT -> sql-table:EMPLOYEES
- `RECEIVES`: EMPMAINT -> LK-SEARCH-KEY (PROCEDURE USING)
- `RECORD_KEY_OF`: EMP-ID -> SELECT:EMP-FILE
- `FILE_STATUS_OF`: WS-FILE-STATUS -> SELECT:EMP-FILE
-
-## How COBOL Differs from Tree-Sitter Languages
-
-| Aspect | COBOL | Tree-Sitter Languages |
-|--------|-------|----------------------|
-| Node variety | 8 types (Module, Function, Namespace, Record, Property, Const, CodeElement, Constructor) | Typically 4-6 (Function, Class, Method, Interface, Module, Const) |
-| Domain edges | RECORD_KEY_OF, FILE_STATUS_OF, ACCESSES, RECEIVES, CONTRACTS, REDEFINES | Primarily CALLS, IMPORTS, EXTENDS, IMPLEMENTS |
-| Data hierarchy | Deep CONTAINS chains (01 -> 05 -> 10 -> 88) | Flat class members |
-| Cross-program calls | CALL "name" + CICS LINK PROGRAM | Import-based resolution |
-| Contract detection | Shared COPY copybook between caller/callee | Not applicable |
-| Metadata | AUTHOR, DATE-WRITTEN on Module | JSDoc/docstring (not indexed) |
-
-## Source Files
-
- `gitnexus/src/core/ingestion/workers/parse-worker.ts` -- `processCobolRegexOnly()`, node/edge emission logic
- `gitnexus/src/core/ingestion/pipeline.ts` -- `detectCrossProgamContracts()` for CONTRACTS edges
- `gitnexus/src/core/ingestion/cobol-preprocessor.ts` -- `CobolRegexResults` interface (all extracted data)
@@ -1,261 +0,0 @@
-# COBOL Performance and Tuning
-
-This document covers real-world benchmarks, worker pool configuration, memory management, known limitations, and troubleshooting for COBOL indexing.
-
-## PROJECT-NAME Benchmark
-
-The PROJECT-NAME project is a large Italian payroll system written in COBOL. It serves as the primary benchmark for COBOL indexing performance.
-
-### Input
-
-| Metric                      | Value                                                                        |
-| --------------------------- | ---------------------------------------------------------------------------- |
-| Paths scanned               | 14,217                                                                       |
-| Parseable files             | 13,129                                                                       |
-| Total source size           | 224 MB                                                                       |
-| Chunks                      | 12 (at 20 MB budget)                                                         |
-| Copybooks loaded            | 2,976                                                                        |
-| Copybooks used in expansion | 2,955                                                                        |
-| Key directories             | `s/` (7773 programs), `c/` (3036 copybooks), `wfproc/` (1973 workflow files) |
-
-### Output
-
-| Metric                 | Value  |
-| ---------------------- | ------ |
-| Graph nodes            | 2.79M  |
-| Graph edges            | 5.67M  |
-| Clusters (communities) | 16,679 |
-| Execution flows        | 300    |
-
-### Timing
-
-| Phase                           | Duration          |
-| ------------------------------- | ----------------- |
-| Total                           | ~251s             |
-| KuzuDB write                    | 132s              |
-| Full-text search indexing       | 6.7s              |
-| Regex extraction (avg per file) | ~1ms              |
-| COPY expansion + deep indexing  | Remainder (~112s) |
-
-### Indexing Command
-
-```bash
-cd /path/to/PROJECT-NAME
-GITNEXUS_COBOL_DIRS=s,c,wfproc GITNEXUS_VERBOSE=1 node --max-old-space-size=8192 \
-  /path/to/gitnexus/dist/cli/index.js analyze --force
-```
-
-## Open-Source Benchmarks
-
-### CardDemo (AWS)
-
-| Metric | Value |
-| ------ | ----- |
-| Graph nodes | 12,323 |
-| Graph edges | 8,893 |
-| Total time | 7.4s |
-
-### ACAS
-
-| Metric | Value |
-| ------ | ----- |
-| Graph nodes | 14,016 |
-| Graph edges | 15,452 |
-| Total time | 9.3s |
-
-### Micro-Benchmark (Single-File Extraction)
-
-| Metric | Value |
-| ------ | ----- |
-| Per-iteration | 0.65ms |
-| Throughput | ~382K lines/sec |
-
-## Worker Pool Tuning
-
-### Sub-Batch Size
-
-The worker pool splits each worker's chunk into sub-batches to bound peak memory per `postMessage` serialization. COBOL repos use a smaller sub-batch size than the default:
-
-| Parameter             | Default     | COBOL Mode          |
-| --------------------- | ----------- | ------------------- |
-| Sub-batch size        | 1,500 files | 200 files           |
-| Per sub-batch timeout | 120s        | 120s (configurable) |
-
-**Why 200?** COBOL regex extraction + preprocessing takes ~1ms per file on average, but with COPY expansion and deep indexing the effective time is ~150ms per file. At sub-batch size 1500, that would be ~225s per sub-batch, exceeding the 120s timeout.
-
-COBOL mode is activated automatically when `GITNEXUS_COBOL_DIRS` is set:
-
-```typescript
-// From pipeline.ts
-const cobolSubBatch = process.env.GITNEXUS_COBOL_DIRS ? 200 : undefined;
-workerPool = createWorkerPool(workerUrl, undefined, cobolSubBatch);
-```
-
-### Worker Count
-
-Workers default to `min(8, cpus - 1)`. For COBOL repos, this is usually sufficient since regex extraction is CPU-bound but fast. The bottleneck is typically KuzuDB write, not extraction.
-
-### Timeout Configuration
-
-| Environment Variable                 | Default         | Purpose                                             |
-| ------------------------------------ | --------------- | --------------------------------------------------- |
-| `GITNEXUS_WORKER_TIMEOUT_MS`         | 120,000 (2 min) | Per sub-batch processing timeout                    |
-| `GITNEXUS_WORKER_STARTUP_TIMEOUT_MS` | 60,000 (1 min)  | Worker initialization timeout (tree-sitter loading) |
-
-For COBOL-only repos, worker startup is faster because tree-sitter native modules are loaded lazily (skipped entirely if only COBOL files are present).
-
-## Data Item Cap
-
-### Configuration
-
-```typescript
-const MAX_DATA_ITEMS_PER_FILE = 500;
-```
-
-This constant appears in both `parse-worker.ts` (worker path) and `parsing-processor.ts` (sequential fallback).
-
-### Rationale
-
-Some COBOL programs, especially after COPY expansion, can have 10,000+ data items. At that scale:
-
- The in-memory relationship Map (for CONTAINS, REDEFINES, etc.) approaches the V8 16.7M entry limit across thousands of files
- KuzuDB write time increases linearly with edge count
- Most deep-nested items (level 20+) are rarely queried individually
-
-### Impact
-
-The cap truncates data items beyond the 500th in source order. Since 01-level Records appear first in COBOL source, the cap preserves:
-
- All 01-level record definitions
- The most important 02-49 level items (those closest to the record root)
- 88-level conditions associated with early items
-
-To increase the cap for specific needs, modify the `MAX_DATA_ITEMS_PER_FILE` constant in both files.
-
-## Memory Management
-
-### COPY Expansion Breadth Guard
-
-A per-file `MAX_TOTAL_EXPANSIONS = 500` limit prevents exponential blowup from diamond-shaped COPY graphs (e.g., N copybooks each containing N COPY statements). Once the limit is reached, further COPY statements in that file are left unexpanded. See [copy-expansion.md](copy-expansion.md) for details.
-
-### COPY Expansion Memory
-
-All copybook content is loaded upfront into a Map before chunk processing begins. For PROJECT-NAME:
-
- 2,976 copybooks, typically under 100MB total
- The Map is shared (read-only) across chunk iterations
- Per-chunk, the copybook map is merged with chunk file content (in case a chunk contains copybooks not in the pre-loaded set)
- After all chunks are processed, the copybook map is freed (`cobolCopybookContents = undefined`)
-
-### Chunk Budget
-
-Source files are grouped into chunks of max 20MB (`CHUNK_BYTE_BUDGET`). Each chunk's lifecycle:
-
-1. Read file content into memory
-2. Expand COPY statements (mutates content in-place)
-3. Dispatch to workers for extraction
-4. Workers return serialized results
-5. Merge results into graph
-6. Chunk content goes out of scope (GC reclaims)
-
-This ensures only ~20MB of source + ~200-400MB of working memory (ASTs, extracted records, serialization) is active at any time.
-
-### Shared Warning Deduplication
-
-The `warnedCircular` set (used by the COPY expansion engine) is shared across all files in a chunk. This prevents the same circular copybook warning (e.g., `ANAZI includes itself`) from being logged thousands of times.
-
-## Known Limitations
-
-| Limitation                               | Impact                                                                                                          | Workaround                                                 |
-| ---------------------------------------- | --------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------- |
-| tree-sitter-cobol hangs on ~5% of files  | Cannot use tree-sitter for COBOL                                                                                | Regex-only extraction (current approach)                   |
-| Data item cap (500/file)                 | May miss deeply nested items in large programs                                                                  | Increase `MAX_DATA_ITEMS_PER_FILE` in source               |
-| Circular copybooks (ANAZI, ANDIP, QDIPE) | Self-referential includes cannot be expanded                                                                    | Detected and skipped with warning                          |
-| wfproc/ files may not be pure COBOL      | Workflow files may produce extraction noise                                                                     | Exclude `wfproc` from `GITNEXUS_COBOL_DIRS` if problematic |
-| No MOVE DATA_FLOW edges yet              | Data flow between variables not in graph                                                                        | Reserved for future release                                |
-| Continuation line handling               | Some complex multi-line continuations (especially in string literals spanning 3+ lines) may not merge correctly | Known edge case; affects <0.1% of lines                    |
-| Single-line EXEC blocks                  | `EXEC SQL SELECT ... END-EXEC` on one line is handled, but pathological nesting is not                          | Extremely rare in practice                                 |
-| Extension case sensitivity               | `.GNM` and `.gnm` are matched differently                                                                       | Use the exact case from the codebase                       |
-
-## Troubleshooting
-
-### "COPY expansion failed"
-
-```
-[pipeline] COPY expansion failed for s/BGTABFL: Cannot read properties of null
-```
-
-**Cause:** A copybook referenced by a COPY statement cannot be found.
-
-**Fix:**
-
-1. Verify `GITNEXUS_COBOL_DIRS` includes the directory containing copybooks (typically `c`)
-2. Check that copybook filenames match the COPY target (case-insensitive, after stripping extensions)
-3. Ensure copybook files are not in `.gitignore`
-
-### Worker sub-batch timeout
-
-```
-Worker 3 sub-batch timed out after 120s (chunk: 200 items)
-```
-
-**Cause:** A sub-batch took longer than the timeout. Typically happens when one file is extremely large (50,000+ lines after COPY expansion).
-
-**Fix:** Increase the timeout:
-
-```bash
-GITNEXUS_WORKER_TIMEOUT_MS=300000 gitnexus analyze
-```
-
-### Memory errors (heap out of memory)
-
-```
-FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - JavaScript heap out of memory
-```
-
-**Fix:** Increase Node.js heap size:
-
-```bash
-node --max-old-space-size=16384 /path/to/gitnexus/dist/cli/index.js analyze
-```
-
-For very large repos (>500MB source), consider `--max-old-space-size=32768`.
-
-### Concurrent analyze corruption
-
-**Rule:** Only ONE `gitnexus analyze` process should run at a time per repository. Concurrent writes to KuzuDB corrupt the database.
-
-If corruption occurs:
-
-```bash
-# Remove the KuzuDB directory and re-index
-rm -rf .gitnexus/kuzu
-gitnexus analyze --force
-```
-
-### Slow KuzuDB write phase
-
-The KuzuDB write phase (132s for PROJECT-NAME) is the bottleneck for large COBOL repos. This is proportional to the number of nodes and edges being written. Reducing `MAX_DATA_ITEMS_PER_FILE` or excluding non-essential directories from `GITNEXUS_COBOL_DIRS` can help.
-
-### Verbose output
-
-Enable verbose logging to see per-phase timing and statistics:
-
-```bash
-GITNEXUS_VERBOSE=1 gitnexus analyze
-```
-
-This outputs:
-
- Scan statistics (paths, parseable files, chunk count)
- Worker pool configuration (worker count, sub-batch size)
- COPY expansion statistics (copybooks loaded, files expanded)
- Community and process detection results
- Contract detection results
-
-## Source Files
-
- `gitnexus/src/core/ingestion/workers/worker-pool.ts` -- `DEFAULT_SUB_BATCH_SIZE`, `SUB_BATCH_TIMEOUT_MS`, `WORKER_STARTUP_TIMEOUT_MS`
- `gitnexus/src/core/ingestion/pipeline.ts` -- `CHUNK_BYTE_BUDGET`, COBOL sub-batch configuration, chunk lifecycle
- `gitnexus/src/core/ingestion/workers/parse-worker.ts` -- `MAX_DATA_ITEMS_PER_FILE`, `processCobolRegexOnly()`
- `gitnexus/src/core/ingestion/parsing-processor.ts` -- Sequential fallback `MAX_DATA_ITEMS_PER_FILE`
@@ -1,206 +0,0 @@
-# COBOL Regex Extraction
-
-The `extractCobolSymbolsWithRegex()` function in `cobol-preprocessor.ts` performs single-pass, state-machine-driven extraction of all COBOL symbols. This document describes the state machine, line processing flow, and every regex pattern used.
-
-## State Machine: Division Tracking
-
-The extractor tracks which COBOL division is currently being processed. Division transitions are detected by the `RE_DIVISION` pattern.
-
-```mermaid
-stateDiagram-v2
-    [*] --> null : Start of file
-    null --> identification : IDENTIFICATION DIVISION
-    identification --> environment : ENVIRONMENT DIVISION
-    environment --> data : DATA DIVISION
-    data --> procedure : PROCEDURE DIVISION
-
-    note right of identification
-        Extracts: PROGRAM-ID, AUTHOR, DATE-WRITTEN
-    end note
-    note right of environment
-        Extracts: SELECT ... ASSIGN ... (file declarations)
-    end note
-    note right of data
-        Extracts: FD entries, data items (01-77, 88), COPY
-    end note
-    note right of procedure
-        Extracts: paragraphs, sections, PERFORM, CALL,
-        ENTRY, MOVE, EXEC SQL/CICS
-    end note
-```
-
-## State Machine: Data Section Tracking
-
-Within the DATA DIVISION, a secondary state machine tracks the current section to tag data items with their origin.
-
-```mermaid
-stateDiagram-v2
-    [*] --> unknown : DATA DIVISION entered
-    unknown --> working_storage : WORKING-STORAGE SECTION
-    unknown --> linkage : LINKAGE SECTION
-    unknown --> file : FILE SECTION
-    unknown --> local_storage : LOCAL-STORAGE SECTION
-    working_storage --> linkage : LINKAGE SECTION
-    working_storage --> file : FILE SECTION
-    linkage --> working_storage : WORKING-STORAGE SECTION
-    file --> working_storage : WORKING-STORAGE SECTION
-    file --> linkage : LINKAGE SECTION
-    local_storage --> working_storage : WORKING-STORAGE SECTION
-```
-
-Within the ENVIRONMENT DIVISION, the `currentEnvSection` tracks whether we are in `INPUT-OUTPUT` or `CONFIGURATION` section. SELECT statement accumulation only occurs in `INPUT-OUTPUT`.
-
-## Line Processing Flow
-
-Each raw source line goes through this pipeline:
-
-```
-Raw line
-  |
-  v
-Length < 7? ---------> Skip (flush pending if any)
-  |
-  v
-Indicator col 7
-  |
-  +-- '*' or '/' -----> Comment: skip entirely
-  |
-  +-- '-' ------------> Continuation: append to pending line
-  |
-  +-- other ----------> Normal: flush pending, strip inline comments (|),
-                        buffer as new pending logical line
-```
-
-After all lines are processed, the final pending line is flushed, along with any accumulated SELECT statement, SORT/MERGE accumulator, and any open EXEC block (truncated file without `END-EXEC`).
-
-### Inline Comment Stripping
-
-Enterprise COBOL (particularly Italian dialect) uses the pipe character `|` as an inline comment marker. The `stripInlineComment()` helper is **quote-aware**: it tracks whether the scan position is inside a single- or double-quoted string and only treats `|` as a comment marker when outside quotes. Pipe characters inside string literals are preserved.
-
-Free-format `*>` inline comment stripping uses the same quote-aware approach: the scanner walks character by character, toggling quote state, and only recognizes `*>` as a comment marker when not inside a quoted string.
-
-### Patch Marker Handling
-
-The `preprocessCobolSource()` function (run before extraction in the worker) replaces non-standard content in columns 1-6. Standard COBOL expects spaces or digit sequence numbers in this area. If any letter or `#` character is found, the entire sequence area is replaced with 6 spaces:
-
-```
-Before: mzADD MOVE WK-AMT TO WK-TOTAL
-After:        MOVE WK-AMT TO WK-TOTAL
-```
-
-This preserves exact line count for position mapping.
-
-## Regex Pattern Reference
-
-All patterns are compiled once as module-level constants and reused across calls.
-
-### Division and Section Detection
-
-| Constant | Pattern | Purpose | Example Match |
-|----------|---------|---------|---------------|
-| `RE_DIVISION` | `\b(IDENTIFICATION\|ENVIRONMENT\|DATA\|PROCEDURE)\s+DIVISION\b` | Division boundary | `PROCEDURE DIVISION` |
-| `RE_SECTION` | `\b(WORKING-STORAGE\|LINKAGE\|FILE\|LOCAL-STORAGE\|INPUT-OUTPUT\|CONFIGURATION)\s+SECTION\b` | Section boundary | `WORKING-STORAGE SECTION` |
-
-### IDENTIFICATION DIVISION
-
-| Constant | Pattern | Purpose | Example Match |
-|----------|---------|---------|---------------|
-| `RE_PROGRAM_ID` | `\bPROGRAM-ID\.\s*([A-Z][A-Z0-9-]*)` | Program name | `PROGRAM-ID. BGTABFL` |
-| `RE_AUTHOR` | `^\s+AUTHOR\.\s*(.+)` | Author metadata | `AUTHOR. D. Smith` |
-| `RE_DATE_WRITTEN` | `^\s+DATE-WRITTEN\.\s*(.+)` | Date metadata | `DATE-WRITTEN. 2024-01-15` |
-
-### ENVIRONMENT DIVISION
-
-| Constant | Pattern | Purpose | Example Match |
-|----------|---------|---------|---------------|
-| `RE_SELECT_START` | `\bSELECT\s+(?:OPTIONAL\s+)?([A-Z][A-Z0-9-]+)` | File SELECT start (with optional `SELECT OPTIONAL` support) | `SELECT MASTER-FILE`, `SELECT OPTIONAL TRANS-FILE` |
-
-SELECT statements are accumulated across multiple lines until a period terminator is found, then parsed for ASSIGN, ORGANIZATION, ACCESS, RECORD KEY, and FILE STATUS clauses.
-
-### DATA DIVISION
-
-| Constant | Pattern | Purpose | Example Match |
-|----------|---------|---------|---------------|
-| `RE_FD` | `^\s+FD\s+([A-Z][A-Z0-9-]+)` | File description | `FD MASTER-FILE` |
-| `RE_DATA_ITEM` | `^\s+(\d{1,2})\s+([A-Z][A-Z0-9-]+)\s*(.*)` | Data item (01-77) | `05 WK-NAME PIC X(30)` |
-| `RE_ANONYMOUS_REDEFINES` | `^\s+(\d{1,2})\s+REDEFINES\s+([A-Z][A-Z0-9-]+)` | Anonymous REDEFINES | `01 REDEFINES WK-REC` |
-| `RE_88_LEVEL` | `^\s+88\s+([A-Z][A-Z0-9-]+)\s+VALUES?\s+(?:ARE\s+)?(.+)` | Condition name | `88 WK-ACTIVE VALUE "Y"` |
-
-The trailing clauses of `RE_DATA_ITEM` are parsed by `parseDataItemClauses()` for PIC, USAGE, OCCURS, and REDEFINES.
-
-### PROCEDURE DIVISION
-
-| Constant | Pattern | Purpose | Example Match |
-|----------|---------|---------|---------------|
-| `RE_PROC_SECTION` | `^       ([A-Z][A-Z0-9-]+)\s+SECTION\.\s*$` | Procedure section header | `       MAIN-LOGIC SECTION.` |
-| `RE_PROC_PARAGRAPH` | `^       ([A-Z][A-Z0-9-]+)\.\s*$` | Paragraph header | `       PROCESS-RECORD.` |
-| `RE_PERFORM` | `\bPERFORM\s+([A-Z][A-Z0-9-]+)(?:\s+THRU\s+([A-Z][A-Z0-9-]+))?` | PERFORM call | `PERFORM CALC-TAX THRU CALC-TAX-EXIT` |
-| `RE_PROC_USING` | `\bPROCEDURE\s+DIVISION\s+USING\s+([\s\S]*?)(?:\.\|$)` | USING parameters | `PROCEDURE DIVISION USING WK-PARAM` |
-| `RE_ENTRY` | `\bENTRY\s+"([^"]+)"(?:\s+USING\s+([\s\S]*?))?(?:\.\|$)` | ENTRY point | `ENTRY "SUBPROG" USING WK-DATA` |
-| `RE_MOVE` | `\bMOVE\s+((?:CORRESPONDING\|CORR)\s+)?([A-Z][A-Z0-9-]+)\s+TO\s+(.+)` | MOVE statement (supports CORR abbreviation and multi-target) | `MOVE WK-NAME TO OUT-NAME`, `MOVE CORR WK-IN TO WK-OUT` |
-
-The USING parameter list (`RE_PROC_USING`) is split on `\bRETURNING\b` before tokenization -- any RETURNING clause and everything after it is excluded from the parameter list (`.split(/\bRETURNING\b/i)[0]`).
-
-Note: `RE_PROC_SECTION` and `RE_PROC_PARAGRAPH` require exactly 7 spaces of leading indentation (COBOL area A starting at column 8). This is the standard COBOL paragraph indentation.
-
-### All-Division Patterns
-
-These patterns are checked regardless of current division:
-
-| Constant | Pattern | Purpose | Example Match |
-|----------|---------|---------|---------------|
-| `RE_CALL` | `\bCALL\s+"([^"]+)"` | External program call | `CALL "BGTABUP"` |
-| `RE_COPY_UNQUOTED` | `\bCOPY\s+([A-Z][A-Z0-9-]+)(?:\s\|\.)` | COPY (unquoted) | `COPY CPSESP.` |
-| `RE_COPY_QUOTED` | `\bCOPY\s+"([^"]+)"(?:\s\|\.)` | COPY (quoted) | `COPY "WORKGRID.CPY".` |
-
-### SORT/MERGE Support
-
-| Constant | Purpose |
-|----------|---------|
-| `SORT_CLAUSE_NOISE` | Set of SORT/MERGE clause keywords filtered from USING/GIVING file lists: `ON`, `ASCENDING`, `DESCENDING`, `KEY`, `WITH`, `DUPLICATES`, `IN`, `ORDER`, `COLLATING`, `SEQUENCE`, `IS`, `THROUGH`, `THRU`, `INPUT`, `OUTPUT`, `PROCEDURE` |
-
-SORT and MERGE statements are accumulated across multiple lines (like SELECT) until a period terminator is found, then parsed for USING/GIVING file lists and INPUT/OUTPUT PROCEDURE targets. The `flushSort()` helper encapsulates the flush-and-parse logic, mirroring the existing `flushSelect()` pattern. Both helpers are called at EOF to handle truncated files.
-
-### GO TO Multi-Target
-
-`RE_GOTO` captures all paragraph names in a `GO TO` statement, including the multi-target form `GO TO p1 p2 p3 DEPENDING ON x`. The captured group contains all target names (space-separated), which are split into individual targets. Each target produces a separate `gotos` entry.
-
-### PROGRAM-ID Detection
-
-PROGRAM-ID is detected regardless of the current division state. This handles sibling programs that appear after `END PROGRAM` and omit the `IDENTIFICATION DIVISION` header -- the extractor will still capture the PROGRAM-ID and push a new program boundary.
-
-### EXEC Block Patterns
-
-| Constant | Pattern | Purpose | Example Match |
-|----------|---------|---------|---------------|
-| `RE_EXEC_SQL_START` | `\bEXEC\s+SQL\b` | Start of EXEC SQL block | `EXEC SQL` |
-| `RE_EXEC_CICS_START` | `\bEXEC\s+CICS\b` | Start of EXEC CICS block | `EXEC CICS` |
-| `RE_END_EXEC` | `\bEND-EXEC\b` | End of EXEC block | `END-EXEC` |
-
-EXEC blocks accumulate all lines between `EXEC SQL/CICS` and `END-EXEC`, then delegate to `parseExecSqlBlock()` or `parseExecCicsBlock()` for detailed extraction.
-
-## Excluded Paragraph Names
-
-The following names are excluded from paragraph detection to avoid false positives from division/section headers:
-
-```
-DECLARATIVES, END, PROCEDURE, IDENTIFICATION,
-ENVIRONMENT, DATA, WORKING-STORAGE, LINKAGE,
-FILE, LOCAL-STORAGE, COMMUNICATION, REPORT,
-SCREEN, INPUT-OUTPUT, CONFIGURATION
-```
-
-Additionally, paragraph candidates containing `DIVISION` or `SECTION` as substrings are excluded.
-
-## MOVE Skip List (Figurative Constants)
-
-MOVE statements where the source is a figurative constant are skipped:
-
-```
-SPACES, ZEROS, ZEROES, LOW-VALUES, LOW-VALUE,
-HIGH-VALUES, HIGH-VALUE, QUOTES, QUOTE, ALL
-```
-
-## Source Files
-
- `gitnexus/src/core/ingestion/cobol-preprocessor.ts` -- `preprocessCobolSource()`, `extractCobolSymbolsWithRegex()`, all regex constants
@@ -1,300 +0,0 @@
-# Using GitNexus across gRPC microservices
-
-## When to use this guide
-
-This guide is for teams whose product lives in **several separate Git repositories** — one per service — and whose services talk to each other over **gRPC** (possibly alongside HTTP and message topics). GitNexus indexes each repo independently, then a _group_ stitches the per-repo indexes into a single cross-repo view that the `impact`, `query`, and `context` tools can traverse. If your services live in one monorepo, much of this still applies — set each service as a member of a group and use the `service` prefix to scope queries — but the walkthrough assumes the harder multi-repo case.
-
-## Mental model
-
- Each repository has its own `.gitnexus/` index (a LadybugDB graph of symbols, relationships, processes). `gitnexus analyze` in each repo produces that index completely independently.
- A **group** is a higher-level construct stored at `~/.gitnexus/groups/<group>/` that references the per-repo indexes by their registry name.
- Sync-time extractors walk each member repo and emit **contracts** — provider or consumer records keyed by a canonical `contractId` (`grpc::auth.AuthService/Login`, `http::GET::/orders`, etc.).
- The sync step matches providers and consumers that share a `contractId` and writes **cross-links** to `<groupDir>/contracts.json`. Those cross-links are what lets `impact({repo: "@<group>", target: "X"})` hop from one repo into another.
- Contracts come from three places: automatic contract extractors (`grpc-extractor`, `http-route-extractor`, `topic-extractor`), a manifest escape hatch (`config.links` in `group.yaml`), and — for same-name symbol matches where no contract is declared — the exact-match matching cascade in [`matching.ts`](../../gitnexus/src/core/group/matching.ts).
- Each repo stays editable and re-indexable on its own. Re-run `gitnexus analyze` in a repo when it changes, then `gitnexus group sync <group>` to refresh `contracts.json`. `gitnexus group status` reports which members are stale.
-
-## Prerequisites
-
- GitNexus installed and runnable as `gitnexus` or `npx gitnexus` (see the root [README.md](../../README.md)).
- Each service repository checked out locally. No requirement that they share a parent directory — the group references them by registry name.
- Write access to `~/.gitnexus/` (the default gitnexus home; see `getDefaultGitnexusDir` in [`storage.ts`](../../gitnexus/src/core/group/storage.ts)).
-
-## Step-by-step walkthrough
-
-The example uses three services — a TypeScript API gateway, a Go orders service, and a Python inventory service — with gRPC between them. The gateway is an `orders` consumer; the orders service is both an `orders` provider and an `inventory` consumer; the inventory service is an `inventory` provider.
-
-### 1. Index each repository
-
-Run `analyze` from inside each service repo (or pass the path). The CLI surface lives in [`gitnexus/src/cli/analyze.ts`](../../gitnexus/src/cli/analyze.ts) and is wired in [`gitnexus/src/cli/index.ts`](../../gitnexus/src/cli/index.ts).
-
-```bash
-cd ~/code/gateway && npx gitnexus analyze
-cd ~/code/orders  && npx gitnexus analyze
-cd ~/code/inventory && npx gitnexus analyze
-```
-
-Useful flags:
-
- `--force` — reindex even if up to date.
- `--embeddings` — generate embedding vectors (needed only if you want semantic search; the exact-match cross-repo cascade does **not** need them).
- `--name <alias>` — register the repo under a specific alias when two repos share a basename (e.g. two `api/` folders).
- `--skip-git` — index a checkout that isn't a git repo.
-
-Each run writes a `.gitnexus/` folder in the repo and registers the repo in `~/.gitnexus/registry.json`. Confirm with `npx gitnexus list`.
-
-### 2. Author `group.yaml`
-
-Create the group directory and edit the config. Either use the CLI scaffolder or write the file directly — both produce the same shape consumed by [`config-parser.ts`](../../gitnexus/src/core/group/config-parser.ts).
-
-```bash
-npx gitnexus group create payments-platform
-# or manually:
-mkdir -p ~/.gitnexus/groups/payments-platform
-$EDITOR   ~/.gitnexus/groups/payments-platform/group.yaml
-```
-
-Minimal working `group.yaml`:
-
-```yaml
-version: 1
-name: payments-platform
-description: Gateway + orders + inventory (gRPC)
-
-repos:
-  gateway: gateway
-  orders: orders
-  inventory: inventory
-
-# Only add explicit links when the automatic extractors miss something —
-# see "When automatic extraction isn't enough" below.
-links: []
-
-packages: {}
-
-detect:
-  http: true
-  grpc: true
-  topics: true
-  shared_libs: true
-  embedding_fallback: false
-
-matching:
-  bm25_threshold: 0.7
-  embedding_threshold: 0.65
-  max_candidates_per_step: 3
-  # Exclude noisy paths from cross-link matching (contracts are still extracted)
-  exclude_links_paths: [/ping, /health, /healthcheck]
-  exclude_links_param_only_paths: true
-```
-
-Field notes (schema in [`types.ts`](../../gitnexus/src/core/group/types.ts)):
-
- `version` — must be `1`. The parser rejects anything else.
- `name` — required; used for the group directory name and all CLI / MCP calls.
- `repos` — a mapping from **group path** (a logical name you choose; can be a hierarchy like `backend/orders`) to **registry name** (the name shown by `npx gitnexus list`). Both sides appear throughout the tooling: contract rows use the group path; `@<group>/<groupPath>` routes tools to a single member.
- `links` — optional manifest escape hatch, one entry per explicit cross-repo contract. Validated by the parser: `from` and `to` must be known repo paths, `type` must be one of `http | grpc | topic | lib | custom`, and `role` must be `provider | consumer`.
- `detect` — toggles per extractor family. Defaults (set in `config-parser.ts`) turn `http`, `grpc`, `topics`, and `shared_libs` on; disable the ones you don't use to speed up sync.
- `matching` — thresholds for the matching cascade. The exact match is always run; other strategies depend on indexer state. Two optional fields reduce false-positive cross-links in large groups:
-  - `exclude_links_paths` — list of HTTP paths to exclude from cross-link matching (default `[]`). Contracts at these paths are still extracted and visible in the registry, but they don't produce cross-repo links. Useful for health-check endpoints (`/ping`, `/health`) that every service exposes. Trailing slashes are normalized.
-  - `exclude_links_param_only_paths` — when `true`, exclude routes where every segment is `{param}` (e.g. `/{param}`, `/{param}/{param}`) from cross-link matching (default `false`). Mixed routes like `/users/{param}` are not affected.
-
-### 3. Sync the group
-
-```bash
-npx gitnexus group sync payments-platform --verbose
-```
-
-What this does (see [`sync.ts`](../../gitnexus/src/core/group/sync.ts)):
-
-1. Opens each member's per-repo LadybugDB.
-2. Runs the HTTP, gRPC, and topic extractors against the source files.
-3. Applies manifest `links` through [`manifest-extractor.ts`](../../gitnexus/src/core/group/extractors/manifest-extractor.ts).
-4. Runs the exact-match cascade, joining providers and consumers that share a normalized `contractId`.
-5. Writes `contracts.json` in the group directory.
-
-Flags:
-
- `--exact-only` — stop after the exact cascade; skip BM25 and embedding fallback.
- `--skip-embeddings` — run exact plus BM25 but not embedding-based matching.
- `--allow-stale` — don't warn if a member's index is stale.
- `--json` — machine-readable output.
-
-The same operation is available over MCP as `group_sync({ name: "payments-platform" })` — see [`tools.ts`](../../gitnexus/src/mcp/tools.ts).
-
-### 4. Inspect the registry
-
-Use `gitnexus group contracts` for the CLI view or read the `gitnexus://group/<name>/contracts` MCP resource for the same data.
-
-```bash
-npx gitnexus group contracts payments-platform --type grpc --json
-```
-
-A shortened response:
-
-```json
-{
-  "contracts": [
-    {
-      "contractId": "grpc::orders.OrderService/PlaceOrder",
-      "type": "grpc",
-      "role": "provider",
-      "repo": "orders",
-      "symbolRef": { "filePath": "internal/grpc/order_server.go", "name": "RegisterOrderServiceServer" },
-      "confidence": 0.8,
-      "meta": { "service": "OrderService", "method": "PlaceOrder", "source": "go_register" }
-    },
-    {
-      "contractId": "grpc::orders.OrderService/PlaceOrder",
-      "type": "grpc",
-      "role": "consumer",
-      "repo": "gateway",
-      "symbolRef": { "filePath": "src/clients/orders.ts", "name": "OrderServiceClient" },
-      "confidence": 0.75,
-      "meta": { "service": "OrderService", "source": "ts_generated_client" }
-    }
-  ],
-  "crossLinks": [
-    {
-      "from": { "repo": "gateway", "symbolUid": "…", "symbolRef": { "filePath": "src/clients/orders.ts", "name": "OrderServiceClient" } },
-      "to":   { "repo": "orders",  "symbolUid": "…", "symbolRef": { "filePath": "internal/grpc/order_server.go", "name": "RegisterOrderServiceServer" } },
-      "type": "grpc",
-      "contractId": "grpc::orders.OrderService/PlaceOrder",
-      "matchType": "exact",
-      "confidence": 1.0
-    }
-  ]
-}
-```
-
-Staleness of the underlying indexes shows up in `npx gitnexus group status payments-platform` or the `gitnexus://group/<name>/status` resource.
-
-### 5. Run cross-repo impact with `@<group>` routing
-
-From any shell (you do **not** have to `cd` into a member repo), the normal `impact` / `query` / `context` tools accept `repo: "@<group>"` to fan out across all members, or `repo: "@<group>/<memberPath>"` to target one member. Routing is implemented in [`resolve-at-member.ts`](../../gitnexus/src/core/group/resolve-at-member.ts) and described in [`tools.ts`](../../gitnexus/src/mcp/tools.ts).
-
-Example MCP calls:
-
-```json
-{"tool": "impact", "arguments": {
-  "repo": "@payments-platform/orders",
-  "target": "PlaceOrder",
-  "direction": "upstream",
-  "crossDepth": 2
-}}
-```
-
-```json
-{"tool": "query", "arguments": {
-  "repo": "@payments-platform",
-  "query": "retry logic around PlaceOrder"
-}}
-```
-
-The CLI equivalents still exist for scripting:
-
-```bash
-npx gitnexus group impact payments-platform \
-  --repo orders --target PlaceOrder --direction upstream --cross-depth 2
-```
-
-Phase 1 walks within the anchor member; Phase 2 hops across the Contract Bridge wherever a cross-link endpoint matches an impacted symbol. See [`cross-impact.ts`](../../gitnexus/src/core/group/cross-impact.ts) for the bridge query.
-
-## How gRPC extraction works
-
-`GrpcExtractor` ([`grpc-extractor.ts`](../../gitnexus/src/core/group/extractors/grpc-extractor.ts)) runs two passes per member repo:
-
-1. **Proto map.** Every `**/*.proto` file is parsed to enumerate `service Foo { rpc Bar(...) }` blocks and (transitively) resolve the package name. Each RPC method becomes a provider contract with `contractId = grpc::<package>.<Service>/<Method>` and `confidence = 0.85`. Parsing uses the vendored `tree-sitter-proto` grammar when available and falls back to a length-preserving manual parser (`extractServiceBlocks`) otherwise, so `.proto` extraction works on platforms where the grammar fails to build.
-2. **Source scan.** Every source file whose extension matches [`GRPC_SCAN_GLOB`](../../gitnexus/src/core/group/extractors/grpc-patterns/index.ts) is parsed by its language plugin:
-
-| Language | Provider signal | Consumer signal |
-|----------|-----------------|-----------------|
-| Go ([`go.ts`](../../gitnexus/src/core/group/extractors/grpc-patterns/go.ts)) | `pb.RegisterXxxServer(...)`, `pb.UnimplementedXxxServer` embedded in struct | `pb.NewXxxClient(conn)` |
-| Java ([`java.ts`](../../gitnexus/src/core/group/extractors/grpc-patterns/java.ts)) | `extends XxxServiceGrpc.XxxServiceImplBase` (with or without `@GrpcService`) | `XxxServiceGrpc.newBlockingStub(...)`, `newStub(...)` |
-| Python ([`python.ts`](../../gitnexus/src/core/group/extractors/grpc-patterns/python.ts)) | `add_XxxServicer_to_server(...)` (bare or `_pb2_grpc.` attribute form) | `XxxStub(channel)` (ignores `Mock`/`Test`/`Fake`/`Stub`) |
-| Node / TS ([`node.ts`](../../gitnexus/src/core/group/extractors/grpc-patterns/node.ts)) | NestJS `@GrpcMethod('Service','Method')` | `@GrpcClient` field typed `XxxServiceClient`, `client.getService<X>('Service')`, `new XxxServiceClient(...)`, `new foo.bar.XxxService(...)` in files that call `loadPackageDefinition` |
-
-For each source-scan detection the extractor looks up the short service name in the proto map and picks:
-
- `grpc::<package>.<Service>/<Method>` when a method is named and the service resolves against the proto map,
- `grpc::<package>.<Service>/*` (wildcard) when only the service is known, or
- `grpc::<ServiceName>/*` when no `.proto` is available at all.
-
-Provider detections land at confidence 0.8 (with proto) or 0.65 (without); consumers at 0.75 or 0.55. NestJS `@GrpcMethod` is fixed at 0.8 because the decorator is self-describing.
-
-### Matching
-
-`matching.ts` lowercases the package/service segment before comparing contract ids, so bindings that capitalize names differently (`auth.AuthService` vs `auth.authservice`) still match. Method names are compared case-sensitively because gRPC's wire path is case-sensitive. Service-only wildcards (`grpc::pkg.Svc/*`) match any method on the same service during cross-linking.
-
-### Known limitations
-
- **Ambiguous proto resolution.** If a short service name exists in more than one `.proto` file and the source-scan hit can't be narrowed down by shared directory segments (`resolveProtoConflict` refuses to guess), the extractor skips contract emission and logs a warning.
- **Proto packages must be resolvable locally.** Transitive imports that point outside the repo produce an empty package segment, which means the contract id collapses to `grpc::<Service>/<Method>`. Cross-repo matches still work as long as both sides agree on the empty package.
- **Rewrite rules are not implemented.** If the provider repo writes `grpc::orders.OrderService/PlaceOrder` and the consumer repo writes `grpc::orderspb.OrderService/PlaceOrder`, they won't cross-link automatically. Use `config.links` to declare the correspondence (see below).
- **One sync = one snapshot.** Contracts are extracted against the indexed snapshot of each repo. Re-index first, then re-sync; the `status` command and resource surface staleness.
-
-## When automatic extraction isn't enough
-
-The escape hatch is the `links` list in `group.yaml`, handled by [`ManifestExtractor`](../../gitnexus/src/core/group/extractors/manifest-extractor.ts). Each entry is a **one-directional** provider/consumer declaration:
-
-```yaml
-version: 1
-name: payments-platform
-repos:
-  gateway: gateway
-  orders: orders
-  inventory: inventory
-
-links:
-  # Explicit gRPC method: use when naming mismatches stop the
-  # automatic matcher from cross-linking.
-  - from: gateway
-    to: orders
-    type: grpc
-    contract: OrderService/PlaceOrder
-    role: consumer
-
-  # Service-level link when you don't want to enumerate methods.
-  - from: orders
-    to: inventory
-    type: grpc
-    contract: InventoryService
-    role: consumer
-
-  # Works for HTTP too — use `METHOD::/path` form for the exact
-  # handler, or just `/path` for a method-agnostic wildcard.
-  - from: gateway
-    to: orders
-    type: http
-    contract: POST::/orders
-    role: consumer
-```
-
-What the manifest extractor does (see [`manifest-extractor.ts`](../../gitnexus/src/core/group/extractors/manifest-extractor.ts)):
-
-1. Builds a canonical `contractId` with `buildContractId` — the same canonicalization used by the automatic extractors, so manifest links cross-match automatic contracts on the other side.
-2. Tries to resolve each side to a real graph symbol (the `Route` node for HTTP, a `Function|Method` / `Class|Interface` for gRPC, a `Package|Module` for `lib`).
-3. If resolution fails, falls back to a deterministic synthetic uid (`manifest::<repo>::<contractId>`) so both sides still line up in cross-impact — name-only links still work when the symbol isn't in the graph.
-4. Emits both a provider and a consumer `StoredContract` (confidence `1.0`, `source: "manifest"`) and a `CrossLink` with `matchType: "manifest"`.
-
-Use `links` for exactly the cases the extractor can't infer: different package names across repos (see #701), hand-rolled transports, cases where the provider repo isn't checked out locally but you still want a record, or any contract whose provider and consumer simply don't share a surface the extractors know how to pattern-match.
-
-History: the manifest extractor used to be silently skipped by the sync pipeline; that was fixed in [#827](https://github.com/abhigyanpatwari/GitNexus/pull/827) (tracking issue #826). If you ever see `config.links` with zero cross-links in `contracts.json`, make sure you're on a build that includes that fix, then re-run `group sync`.
-
-## Troubleshooting
-
-1. **`contracts.json` is empty after a sync.** Either no member repo contained a recognizable gRPC pattern, or the extractors are disabled in `detect`. Confirm `detect.grpc: true` and re-run with `--verbose`.
-2. **A known provider/consumer pair doesn't cross-link.** Most common cause: the package segment differs. Check the raw contract ids with `gitnexus group contracts <name> --unmatched` — if you see two same-method contracts with different package prefixes, add a manifest `links:` entry to bridge them (no automatic rewrite rules yet).
-3. **`matchType: "manifest"` is missing entirely.** The extractor needs `config.links` to be non-empty and the sync pipeline to actually call it — verify you're on a post-#827 build. Empty contract rows for manifest links usually mean `resolveSymbol` couldn't find a graph match; the synthetic uid still lets cross-impact work, it just won't carry a file path.
-4. **Ambiguous proto warnings.** Look for `[grpc-extractor] Ambiguous proto resolution` in the sync logs; that means a service name exists in multiple `.proto` files under the same repo and the path-distance heuristic couldn't pick a winner. Resolve by renaming the service or declaring the intended pairing in `config.links`.
-5. **Cross-impact says "stale".** Both sides need a fresh per-repo index _and_ a fresh group sync. Order matters: `gitnexus analyze` in each changed repo, then `gitnexus group sync <name>`. Use `gitnexus group status <name>` to see which side is behind.
-
-## Related docs and references
-
- [AGENTS.md](../../AGENTS.md) — authoritative list of MCP tools and resources, including group-mode routing and the `gitnexus://group/…` resources.
- [ARCHITECTURE.md](../../ARCHITECTURE.md) — overall data flow and the call-resolution DAG that the per-repo indexer uses.
- [`gitnexus/src/core/group/`](../../gitnexus/src/core/group/) — `service.ts`, `sync.ts`, `config-parser.ts`, `matching.ts`.
- [`gitnexus/src/core/group/extractors/grpc-extractor.ts`](../../gitnexus/src/core/group/extractors/grpc-extractor.ts) and [`grpc-patterns/`](../../gitnexus/src/core/group/extractors/grpc-patterns/) — gRPC detection.
- [`gitnexus/src/core/group/extractors/manifest-extractor.ts`](../../gitnexus/src/core/group/extractors/manifest-extractor.ts) — the `config.links` escape hatch.
- [`gitnexus/src/mcp/tools.ts`](../../gitnexus/src/mcp/tools.ts) — MCP tool schemas (`group_list`, `group_sync`, plus `@<group>` routing on `impact` / `query` / `context`).
- [`gitnexus/src/cli/group.ts`](../../gitnexus/src/cli/group.ts) — CLI command definitions and flags.
- Upstream issues: [#701](https://github.com/abhigyanpatwari/GitNexus/issues/701), [#826](https://github.com/abhigyanpatwari/GitNexus/issues/826), [#906](https://github.com/abhigyanpatwari/GitNexus/issues/906).
@@ -1,326 +0,0 @@
---
-title: "feat: Complete COBOL language feature coverage for maximum knowledge graph value"
-type: feat
-status: active
-date: 2026-03-26
-origin: Feature audit from v3-integration-architect agent (session 8642401e)
---
-
-## Enhancement Summary
-
-**Deepened on:** 2026-03-26
-**Research agents used:** COBOL expert (Phase 1+2), graph value analyst, codebase explorer
-**Sections enhanced:** Phase 1 (5 features), Phase 2 (4 features), graph value ranking
-
-### Key Improvements from Research
-1. **CALL USING** is the #1 highest-value edge type (9.2/10) — fixes ~40% of missing caller references
-2. **EXEC DLI** requires dual-interface support (EXEC DLI + CBLTDLI CALL) for full IMS coverage
-3. **DECLARATIVES** is lowest-risk Phase 2 item — existing section/paragraph detection already captures structure
-4. **SET TO TRUE** accounts for 80-90% of all SET statements — prioritize this form
-5. **INSPECT** needs multi-line accumulator (like SORT) — can span 5+ continuation lines
-6. **Graph value ranking**: cobol-call-using (9.2) > cobol-error-handler (9.0) > dli-gu (8.2) > cobol-string (6.2)
-
-### New Edge Cases Discovered
- CALL USING supports mixed modes: `USING BY REFERENCE WS-A BY CONTENT WS-B BY VALUE WS-C`
- CALL USING `ADDRESS OF` and `OMITTED` must be filtered from parameter lists
- EXEC DLI can have multiple SEGMENT levels in hierarchical retrieval (use matchAll)
- DECLARATIVES can have multiple USE sections (one per file + catch-all for INPUT/OUTPUT/I-O/EXTEND)
- INSPECT TALLYING can have multiple counters in a single statement
- STRING/UNSTRING can span multiple lines (need accumulator pattern)
-
---
-
-# Complete COBOL Language Feature Coverage
-
-## Overview
-
-Implement the remaining 25 unhandled COBOL language features and fix 10 partial features to achieve ~95% coverage (up from 71.9%). The goal is to build the richest possible knowledge graph from COBOL codebases, enabling a future `modernize` MCP command (out of scope for this plan) that would use the graph to assist with COBOL-to-modern-language migration.
-
-## Problem Statement
-
-The COBOL processor currently handles 54 of 89 applicable language features (71.9%). The 25 unhandled features represent real data loss in the knowledge graph:
- **Cross-program data flow** is invisible (CALL ... USING parameters not extracted)
- **IMS/DB programs** produce empty graphs (EXEC DLI not recognized)
- **String transformation logic** is invisible (STRING/UNSTRING/INSPECT not tracked)
- **SQL copybook dependencies** are missing (EXEC SQL INCLUDE not mapped)
- **Error handling flows** are lost (DECLARATIVES/USE AFTER not captured)
-
-## Proposed Solution
-
-Implement features in 4 phases, ordered by graph value density (edges created per LOC of implementation). Each phase is independently shippable and testable.
-
-## Technical Approach
-
-### Phase 1: High-Value Data Flow Edges (~150 LOC, ~8 new edge types)
-
-The highest-ROI features: they create new ACCESSES and IMPORTS edges that directly improve impact analysis.
-
-**Critical research finding**: Multi-line statement accumulation is the dominant challenge. CALL USING, STRING/UNSTRING, and multi-line data item clauses all span multiple lines in production COBOL. The free-format path processes each line independently — these features need statement accumulators (like SORT/SELECT) or the free-format path needs multi-line awareness. Estimated LOC increased from 110 to 150 to account for accumulator infrastructure.
-
-#### 1.1 EXEC SQL INCLUDE -> IMPORTS edges
- **File:** `cobol-preprocessor.ts` (parseExecSqlBlock)
- **What:** Detect `INCLUDE` as the operation, extract member name, emit as a `copies[]` entry
- **Graph:** IMPORTS edge from File to included copybook/SQLCA with reason `sql-include`
- **Tests:** Unit test for `EXEC SQL INCLUDE SQLCA END-EXEC` and `EXEC SQL INCLUDE CUSTCOPY END-EXEC`
-
-**Research insights (EXEC SQL INCLUDE):**
- DB2 member names can contain underscores: `EXEC SQL INCLUDE CUST_TBL_DCL END-EXEC` — regex must use `[A-Z][A-Z0-9_-]+`
- Quoted literal form: `EXEC SQL INCLUDE 'DBRMLIB.MEMBER' END-EXEC` (z/OS PDS qualified name)
- SQLCA/SQLDA are DB2 builtins — won't resolve to repo files. Emit unresolved IMPORTS edge (still valuable)
- No REPLACING support on EXEC SQL INCLUDE (unlike COPY)
- Add `INCLUDE` to `OP_MAP` in `parseExecSqlBlock`; extract member via `RE_SQL_INCLUDE = /^INCLUDE\s+(?:'([^']+)'|"([^"]+)"|([A-Z][A-Z0-9_-]+))/i`
-
-#### 1.2 CALL ... USING parameter extraction -> ACCESSES edges (Graph value: 9.2/10)
- **File:** `cobol-preprocessor.ts` (processLogicalLine CALL section)
- **What:** After capturing CALL target, scan for USING clause. Extract parameter names (reuse USING_KEYWORDS filter). Store as `calls[].parameters: string[]`
- **Interface:** Add `parameters?: string[]` to calls array type in CobolRegexResults
- **File:** `cobol-processor.ts` (CALL edge block)
- **Graph:** For each USING parameter, create ACCESSES edge from caller to data item Property node with reason `cobol-call-using`
- **Tests:** `CALL 'AUDITLOG' USING CUST-ID WS-AMOUNT` -> 2 ACCESSES edges
-
-**Research insights (CALL USING forms):**
- Mixed modes: `CALL 'PGM' USING BY REFERENCE WS-A BY CONTENT WS-B BY VALUE WS-C`
- Pointer passing: `CALL 'PGM' USING ADDRESS OF WS-A`
- Placeholder: `CALL 'PGM' USING OMITTED WS-B`
- Filter keywords: add `ADDRESS`, `OMITTED`, `LENGTH` to USING_KEYWORDS (already has BY/VALUE/REFERENCE/CONTENT)
- **Impact tool enhancement:** CALL-USING edges enable BFS traversal through parameter data flow — single most impactful edge type for COBOL impact analysis
-
-#### 1.3 STRING/UNSTRING data flow -> ACCESSES edges
- **File:** `cobol-preprocessor.ts` (new section in extractProcedure)
- **What:** Accumulate multi-line STRING/UNSTRING until period or END-STRING/END-UNSTRING. Extract sources and INTO targets.
- **Interface:** Add `strings: Array<{ sources: string[]; target: string; type: 'string' | 'unstring'; line: number; caller: string | null }>` to CobolRegexResults
- **Graph:** read-ACCESSES on sources, write-ACCESSES on INTO target with reason `cobol-string-read` / `cobol-string-write`
- **Tests:** 2 unit tests + integration test assertions
-
-**Research insights (STRING/UNSTRING):**
- **Needs statement accumulator** — STRING/UNSTRING always span multiple lines in production
- Terminate accumulation at: period, END-STRING/END-UNSTRING, or start of next COBOL verb
- STRING sources: identifiers before each `DELIMITED BY`. Filter: STRING, DELIMITED, BY, SIZE, ALL, INTO, WITH, POINTER, ON, OVERFLOW, NOT, END-STRING
- UNSTRING: source is first identifier after UNSTRING; INTO targets are identifiers after INTO. Filter: DELIMITER, IN, COUNT, TALLYING, OR
- WITH POINTER field is both read AND written (starting position updated)
- TALLYING IN / COUNT IN fields are write targets
- Literal sources (`'text'`) must be filtered — quote-aware tokenization needed
- **Edge case**: STRING terminated by next verb, not period — existing fixture has `STRING ... DISPLAY` without period between them
-
-#### 1.4 OCCURS DEPENDING ON -> ACCESSES edge
- **File:** `cobol-preprocessor.ts` (parseDataItemClauses)
- **What:** Extend OCCURS regex to capture DEPENDING ON field, KEY fields, and INDEXED BY names
- **Interface:** Add `dependingOn?: string`, `occursMax?: number`, `occursKeys?: Array<{direction: string; fields: string[]}>`, `indexedBy?: string[]` to data items
- **Graph:** ACCESSES edge from table item to controlling field with reason `cobol-depends-on`
- **Tests:** `05 WS-TABLE OCCURS 100 DEPENDING ON WS-COUNT` -> edge
-
-**Research insights (OCCURS):**
- IBM allows `OCCURS 0 TO n DEPENDING ON` (zero minimum) and `OCCURS UNBOUNDED DEPENDING ON` (V6.4)
- Subscripted controlling fields: `DEPENDING ON WS-COUNT(WS-IDX)` — strip subscripts before storing
- **Pre-existing gap**: Multi-line data item clauses without continuation indicator are NOT captured. `05 WS-TABLE\n    OCCURS 100\n    DEPENDING ON WS-COUNT.` — the current RE_DATA_ITEM only gets the first line, `rest` is empty. Fixing properly requires a data item accumulator (like SELECT). **Defer full fix to Phase 3; implement same-line capture now.**
- KEY IS fields: `ASCENDING KEY IS WS-KEY-1 WS-KEY-2` — capture for SEARCH ALL resolution
- INDEXED BY: `INDEXED BY IDX-1 IDX-2` — capture for SET/SEARCH context
-
-#### 1.5 VALUE clause for standard data items
- **File:** `cobol-preprocessor.ts` (parseDataItemClauses)
- **What:** Extract VALUE using a pragmatic function that handles quoted strings, numerics, figurative constants, hex/national literals
- **Interface:** Already exists as `values?: string[]` on data items (currently only populated for 88-level)
- **Graph:** Stored in Property node description (no new edges)
- **Tests:** `01 WS-STATUS PIC X VALUE 'A'` -> values: ['A']
-
-**Research insights (VALUE forms):**
- Hex literals: `VALUE X'F1F2F3F4'`, National: `VALUE N'text'`, DBCS: `VALUE G'text'`
- Figurative constants: SPACES, ZEROS, ZEROES, LOW-VALUES, HIGH-VALUES, QUOTES, NULL, NULLS
- ALL literal: `VALUE ALL '*'`
- Numeric with sign/decimal: `VALUE -123.45`, `VALUE +1`
- `VALUE IS` optional — both `VALUE 'A'` and `VALUE IS 'A'` valid
- **Decimal vs period ambiguity**: `VALUE 100.` — is `.` decimal or terminator? `parseDataItemClauses` already strips trailing period, so this is handled
- IBM V6.4: floating-point `VALUE 1.0E5` — extend numeric regex if needed
- Implementation: use a pragmatic `extractValue(rest)` function, not a single complex regex
-
-### Phase 2: EXEC DLI + DECLARATIVES (~90 LOC, ~4 new edge types)
-
-IMS/DB support and error handling flows.
-
-#### 2.1 EXEC DLI (IMS/DB) -> ACCESSES edges (Graph value: 8.2/10)
- **File:** `cobol-preprocessor.ts` (processLogicalLine — add RE_EXEC_DLI_START check alongside SQL/CICS)
- **What:** Accumulate EXEC DLI blocks like EXEC SQL. Parse DLI verbs (GU, GN, GNP, GHU, GHN, GHNP, ISRT, DLET, REPL, CHKP, SCHD, TERM). Extract segment name, PCB number, INTO/FROM areas, WHERE fields, PSB name.
- **Interface:** Add `execDliBlocks: Array<{ line: number; verb: string; pcbNumber?: number; segmentName?: string; intoField?: string; fromField?: string; whereField?: string; psbName?: string }>` to CobolRegexResults
- **Graph:** CodeElement node + ACCESSES edge to `<ims>:<segmentName>` Record node with reason `dli-{verb}`; ACCESSES edges to INTO/FROM data areas; PSB ACCESSES for SCHD
- **Tests:** `EXEC DLI GU USING PCB(1) SEGMENT(CUSTOMER) INTO(WS-CUST) END-EXEC`
-
-**Research insights (dual IMS interface):**
- **EXEC DLI**: Embedded command interface for CICS-DL/I programs only
- **CBLTDLI CALL**: Batch interface via `CALL 'CBLTDLI' USING function-code PCB io-area SSA1..SSA15`
- CBLTDLI is already captured as a CALL to 'CBLTDLI' — enrich with USING parameter semantics later
- Multiple SEGMENT levels in hierarchical retrieval — use `matchAll` on segment regex
- DLI verbs: GU (most common), GN, GNP, GHU, GHN, GHNP, ISRT, REPL, DLET, CHKP, SCHD, TERM, ROLL, ROLB
- **Edge case**: DLET/REPL have no SEGMENT clause (operate on current position)
- **Recommended order**: Implement AFTER DECLARATIVES and SET (lower risk, higher frequency)
-
-#### 2.2 DECLARATIVES / USE AFTER STANDARD EXCEPTION (Graph value: 9.0/10)
- **File:** `cobol-preprocessor.ts` (processLogicalLine — detect DECLARATIVES keyword, track USE AFTER blocks)
- **What:** When `DECLARATIVES.` is encountered, switch to declaratives mode. Extract USE statements binding sections to files/modes.
- **Interface:** Add `declaratives: Array<{ sectionName: string; useType: 'error' | 'debug' | 'label' | 'reporting'; target: string; line: number }>` to CobolRegexResults
- **Graph:** ACCESSES edge from declarative Namespace to file Record with reason `cobol-declarative-error-handler`
- **Tests:** Unit test with DECLARATIVES section, integration test for error flow
-
-**Research insights (DECLARATIVES syntax):**
- `USE AFTER STANDARD {EXCEPTION|ERROR} ON {file-name|INPUT|OUTPUT|I-O|EXTEND}`
- EXCEPTION and ERROR are synonymous; STANDARD is optional in IBM dialects
- Multiple USE sections allowed (one per file + catch-all for I/O modes)
- `END DECLARATIVES.` must NOT reset PROCEDURE DIVISION state
- `DECLARATIVES` is already in EXCLUDED_PARA_NAMES — no false paragraph risk
- Existing section/paragraph detection already captures structural elements — just need USE binding
- **Lowest risk Phase 2 item** — implement first
-
-#### 2.3 SET statement -> ACCESSES edges
- **File:** `cobol-preprocessor.ts` (extractProcedure — new RE_SET regex)
- **Interface:** Add `sets: Array<{ targets: string[]; form: 'to-true'|'to-value'|'up-by'|'down-by'|'address-of'|'to-null'|'to-entry'; value?: string; entryTarget?: string; entryIsLiteral?: boolean; line: number; caller: string | null }>` to CobolRegexResults
- **Graph:** ACCESSES write edge with reason `cobol-set-condition` (TO TRUE), `cobol-set-index` (TO/UP/DOWN), `cobol-set-address` (ADDRESS OF). SET ENTRY with literal -> CALLS edge.
- **Tests:** `SET WS-EOF TO TRUE`, `SET IDX-1 TO 5`, `SET IDX-1 UP BY 1`
-
-**Research insights (SET forms by frequency):**
- `SET condition TO TRUE` — 80-90% of all SET usage. Multiple targets: `SET COND-A COND-B TO TRUE`
- `SET index TO/UP BY/DOWN BY` — ~8%. Multiple indices: `SET IDX-1 IDX-2 UP BY 1`
- `SET pointer TO ADDRESS OF data-item` / `SET ADDRESS OF data-item TO pointer` — ~2%
- `SET proc-ptr TO ENTRY "PROGNAME"` — rare but creates CALLS edge (like dynamic CALL)
- Filter OF/IN qualifiers: `SET COND-A OF WS-RECORD TO TRUE` (strip OF WS-RECORD)
- **Prioritize**: SET TO TRUE alone covers 80-90% — implement this form first
-
-#### 2.4 INSPECT -> ACCESSES edges
- **File:** `cobol-preprocessor.ts` (extractProcedure — new `inspectAccum` accumulator like SORT)
- **What:** Accumulate multi-line INSPECT until period. Extract inspected field + tally counters.
- **Interface:** Add `inspects: Array<{ inspectedField: string; counters: string[]; form: 'tallying'|'replacing'|'converting'|'tallying-replacing'; line: number; caller: string | null }>` to CobolRegexResults
- **Graph:** ACCESSES read on inspected field always; write if REPLACING/CONVERTING. Write edges for tally counters. Reason: `cobol-inspect-read`/`cobol-inspect-write`/`cobol-inspect-tally`
- **Tests:** `INSPECT WS-FIELD TALLYING WS-COUNT FOR ALL 'A'` -> read on WS-FIELD, write on WS-COUNT
-
-**Research insights (INSPECT forms by frequency):**
- REPLACING (~60%): `INSPECT WS-STR REPLACING ALL 'A' BY 'B'`
- TALLYING (~25%): `INSPECT WS-STR TALLYING WS-CNT FOR ALL 'A'` — multiple counters possible
- CONVERTING (~10%): `INSPECT WS-STR CONVERTING 'abc' TO 'ABC'`
- Combined (~5%): TALLYING + REPLACING in single statement
- **Needs multi-line accumulator** — INSPECT frequently spans 3-5 lines in production
- Extract tally counters with `([A-Z][A-Z0-9-]+)\s+FOR\b` matchAll pattern
- Filter figurative constants (SPACES, ZEROS) using existing MOVE_SKIP set
-
-### Phase 3: Completeness Fixes (~60 LOC)
-
-Fix the 10 partial features and small gaps.
-
-#### 3.1 CALL ... RETURNING extraction
- Extend RE_CALL processing to capture RETURNING target after the USING clause
- Store as `calls[].returning?: string`
- Graph: ACCESSES write edge with reason `cobol-call-returning`
-
-#### 3.2 SELECT OPTIONAL flag preservation
- Store `isOptional: boolean` in FileDeclaration interface
- Include in Record node description
-
-#### 3.3 ALTERNATE RECORD KEY extraction
- Add regex in parseSelectStatement: `/\bALTERNATE\s+RECORD\s+KEY\s+(?:IS\s+)?([A-Z][A-Z0-9-]+)/i`
- Store as `alternateKeys?: string[]`
-
-#### 3.4 COMMON attribute on nested programs
- Extend RE_PROGRAM_ID: `/\bPROGRAM-ID\.\s*([A-Z][A-Z0-9-]+)(?:\s+IS\s+COMMON)?/i`
- Store `isCommon: boolean` on Module node
- Affects cross-program CALL resolution scope
-
-#### 3.5 IS EXTERNAL / IS GLOBAL as first-class properties
- Change from usage string hack to proper boolean fields on data items
- Add `isExternal?: boolean`, `isGlobal?: boolean` to data item interface
-
-#### 3.6 AUTHOR / DATE-WRITTEN mapped to Module node
- Already extracted as programMetadata — map to Module node properties
- `graph.addNode({ ..., properties: { ..., author, dateWritten } })`
-
-#### 3.7 REPLACE statement
- Track REPLACE / REPLACE OFF state in preprocessor
- Apply text substitutions during preprocessing (before regex extraction)
- Complex: requires careful scoping rules
-
-### Phase 4: Niche Features (~30 LOC)
-
-Low-priority but nice for completeness.
-
-#### 4.1 INITIALIZE statement -> write ACCESSES
- `/\bINITIALIZE\s+([A-Z][A-Z0-9-]+)/i`
- ACCESSES write edge with reason `cobol-initialize`
-
-#### 4.2 Remaining IDENTIFICATION DIVISION paragraphs
- DATE-COMPILED, INSTALLATION, SECURITY, REMARKS
- Map to Module node description properties
-
-#### 4.3 EXEC SQL INCLUDE -> IMPORTS edge (expansion)
- For EXEC SQL INCLUDE inside EXEC blocks that reference copybooks containing SQL
- Create IMPORTS edge similar to COPY
-
-## Acceptance Criteria
-
-### Functional Requirements
-
- [ ] Phase 1: All 5 features implemented with unit + integration tests
- [ ] Phase 2: All 4 features implemented with unit + integration tests
- [ ] Phase 3: All 7 partial features fixed
- [ ] Phase 4: At least 2 of 3 niche features implemented
- [ ] All existing 145 tests continue to pass
- [ ] TypeScript compiles cleanly
-
-### Non-Functional Requirements
-
- [ ] No performance regression: CardDemo benchmark stays under 8s
- [ ] No file exceeds 1500 LOC (preprocessor currently 1326)
- [ ] ACAS benchmark shows increased node/edge counts (more data extracted)
- [ ] CardDemo benchmark shows increased edge counts (CALL USING, STRING, etc.)
-
-### Quality Gates
-
- [ ] Each phase has its own commit
- [ ] Integration test assertions updated with exact counts per phase
- [ ] Benchmark run after each phase to track graph growth
-
-## Dependencies & Risks
-
-### Dependencies
- None. All changes are additive to existing COBOL processor code.
- No LanguageProvider changes needed.
- No graph schema changes needed (all new constructs map to existing node labels + edge types).
-
-### Risks
- **preprocessor.ts size**: Currently 1326 LOC. Phase 1+2 adds ~200 LOC -> 1526 LOC. May need to extract helpers into a separate `cobol-data-flow.ts` module if it exceeds 1500.
- **REPLACE statement** (Phase 3.7) is the most complex feature — requires tracking text substitution state across logical lines. Consider deferring to a separate PR if it takes >100 LOC.
- **EXEC DLI** (Phase 2.1) is only testable against IMS codebases. Need fixture data or synthetic test cases.
-
-## Graph Value Ranking by MCP Tool Impact
-
-Research agent analyzed all 5 MCP tools (query, context, impact, detect_changes, rename) against planned edge types:
-
-| Edge Type | QUERY | CONTEXT | IMPACT | DETECT | RENAME | **Overall** |
-|-----------|-------|---------|--------|--------|--------|-------------|
-| `cobol-call-using` | 4/5 | 5/5 | 5/5 | 4/5 | 4/5 | **9.2/10** |
-| `cobol-error-handler` | 5/5 | 4/5 | 5/5 | 5/5 | 2/5 | **9.0/10** |
-| `dli-*` (IMS verbs) | 4/5 | 4/5 | 5/5 | 4/5 | 2/5 | **8.2/10** |
-| `cobol-string-*` | 4/5 | 3/5 | 3/5 | 3/5 | 2/5 | **6.2/10** |
-
-**Key finding**: `cobol-call-using` alone would fix ~40% of missing caller references in COBOL graphs.
-
-## Future Considerations
-
-This plan provides the graph data foundation for a future `modernize` MCP command (out of scope) that would:
- Use CALL USING edges to map data contracts between programs
- Use STRING/UNSTRING edges to identify data transformation logic
- Use EXEC SQL/DLI edges to map database access patterns
- Use DECLARATIVES to understand error handling architecture
- Use the complete knowledge graph to generate migration plans
-
-**MCP tool enhancements needed** (after this plan ships):
- Add `cobol-call-using`, `cobol-error-handler`, `dli-*` to IMPACT tool's default `relationTypes` for COBOL repos
- Add confidence floors for new edge types in `IMPACT_RELATION_CONFIDENCE`
- Register new edge types in `VALID_RELATION_TYPES` set (`local-backend.ts:52`)
-
-## Sources & References
-
-### Internal References
- Feature audit: session 8642401e (COBOL expert agent, 123 features audited)
- Prior plans: `docs/plans/2026-03-25-feat-cobol-100-percent-feature-coverage-plan.md`
- Architecture: `docs/code-indexing/cobol/` (7 documentation files)
-
-### External References
- COBOL features reference: mainframestechhelp.com/tutorials/cobol/features.htm
- COBOL-85 standard: ISO/IEC 1989:1985
- IBM Enterprise COBOL reference
@@ -1,725 +0,0 @@
-# PR #626 HIGH-Priority Fixes Implementation Plan
-
-> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
-
-**Goal:** Fix 4 HIGH-priority issues from PR #626 code review before merge.
-
-**Architecture:** Minimal targeted fixes — each task is independent. TDD: tests first, then implementation. No refactoring beyond what's needed.
-
-**Tech Stack:** TypeScript, Vitest, Node.js fs/path APIs
-
-**Spec:** `docs/superpowers/specs/2026-04-02-pr626-high-fixes-design.md`
-
-**Paths:** All file paths are relative to the monorepo root (`GitNexus/`). Git commands run from the root. The `gitnexus/` prefix is a package subdirectory, not a separate repo.
-
---
-
-### Task 1: Path Traversal — Validate Group Name
-
-**Files:**
- Modify: `gitnexus/src/core/group/storage.ts:17-19` (getGroupDir) and `:63-68` (createGroupDir)
- Test: `gitnexus/test/unit/group/storage.test.ts`
-
- [ ] **Step 1: Write failing tests for validateGroupName**
-
-In `gitnexus/test/unit/group/storage.test.ts`, add `createGroupDir` and `validateGroupName` to the existing import from `'../../../src/core/group/storage.js'` (line 6-11). Then add these describe blocks at the end of the outer `describe('Group storage', ...)`:
-
-```typescript
-  describe('validateGroupName', () => {
-    it('test_validateGroupName_traversal_path_throws', () => {
-      expect(() => validateGroupName('../../evil')).toThrow(/Invalid group name/);
-    });
-
-    it('test_validateGroupName_slash_in_name_throws', () => {
-      expect(() => validateGroupName('foo/bar')).toThrow(/Invalid group name/);
-    });
-
-    it('test_validateGroupName_empty_string_throws', () => {
-      expect(() => validateGroupName('')).toThrow(/Invalid group name/);
-    });
-
-    it('test_validateGroupName_starts_with_dash_throws', () => {
-      expect(() => validateGroupName('-leading-dash')).toThrow(/Invalid group name/);
-    });
-
-    it('test_validateGroupName_starts_with_underscore_throws', () => {
-      expect(() => validateGroupName('_leading')).toThrow(/Invalid group name/);
-    });
-
-    it('test_validateGroupName_dots_throws', () => {
-      expect(() => validateGroupName('com.example')).toThrow(/Invalid group name/);
-    });
-
-    it('test_validateGroupName_valid_alphanumeric_passes', () => {
-      expect(() => validateGroupName('my-group_01')).not.toThrow();
-    });
-
-    it('test_validateGroupName_single_char_passes', () => {
-      expect(() => validateGroupName('A')).not.toThrow();
-    });
-
-    it('test_validateGroupName_all_digits_passes', () => {
-      expect(() => validateGroupName('123')).not.toThrow();
-    });
-  });
-
-  describe('getGroupDir rejects invalid names', () => {
-    it('test_getGroupDir_traversal_throws', () => {
-      expect(() => getGroupDir(tmpDir, '../../etc')).toThrow(/Invalid group name/);
-    });
-
-    it('test_getGroupDir_valid_name_returns_path', () => {
-      const dir = getGroupDir(tmpDir, 'company');
-      expect(dir).toBe(path.join(tmpDir, 'groups', 'company'));
-    });
-  });
-
-  describe('createGroupDir rejects invalid names', () => {
-    it('test_createGroupDir_traversal_throws', async () => {
-      await expect(createGroupDir(tmpDir, '../evil')).rejects.toThrow(/Invalid group name/);
-    });
-  });
-```
-
- [ ] **Step 2: Run tests to verify they fail**
-
-Run: `cd gitnexus && npx vitest run test/unit/group/storage.test.ts`
-Expected: FAIL — `validateGroupName` is not exported, `getGroupDir` does not throw.
-
- [ ] **Step 3: Implement validateGroupName and wire into getGroupDir and createGroupDir**
-
-In `gitnexus/src/core/group/storage.ts`, add the validation function before `getGroupDir` and call it:
-
-```typescript
-const GROUP_NAME_RE = /^[a-zA-Z0-9][a-zA-Z0-9_-]*$/;
-
-export function validateGroupName(name: string): void {
-  if (!GROUP_NAME_RE.test(name)) {
-    throw new Error(
-      `Invalid group name "${name}". Names must start with a letter or digit and contain only [a-zA-Z0-9_-].`,
-    );
-  }
-}
-
-export function getGroupDir(gitnexusDir: string, groupName: string): string {
-  validateGroupName(groupName);
-  return path.join(gitnexusDir, 'groups', groupName);
-}
-```
-
-`createGroupDir` already calls `getGroupDir` at line 68, so it inherits validation automatically. No change needed in `createGroupDir`.
-
- [ ] **Step 4: Run tests to verify they pass**
-
-Run: `cd gitnexus && npx vitest run test/unit/group/storage.test.ts`
-Expected: ALL PASS
-
- [ ] **Step 5: Commit**
-
-```bash
-cd gitnexus && git add src/core/group/storage.ts test/unit/group/storage.test.ts
-git commit -m "fix(group): validate group name to prevent path traversal
-
-Add validateGroupName() with regex [a-zA-Z0-9][a-zA-Z0-9_-]*.
-Called in getGroupDir (defense in depth) which covers all CLI entry
-points: create, add, remove, status, sync.
-
-Addresses PR #626 review item 1 (HIGH).
-
-Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>"
-```
-
---
-
-### Task 2: Directory Exclusions in Service Boundary Detector
-
-**Files:**
- Modify: `gitnexus/src/core/group/service-boundary-detector.ts:24-51` (add constant), `:78` (walkForBoundaries), `:130` (hasSourceFilesInSubdirs)
- Test: `gitnexus/test/unit/group/service-boundary-detector.test.ts`
-
- [ ] **Step 1: Write failing tests for excluded directories**
-
-Add this describe block inside the existing `detectServiceBoundaries` describe in `gitnexus/test/unit/group/service-boundary-detector.test.ts`:
-
-```typescript
-    it('test_detect_skips_vendor_directory', async () => {
-      writeFile('services/auth/package.json', '{}');
-      writeFile('services/auth/src/index.ts', '');
-      // vendor should be skipped — its contents should not create a boundary
-      writeFile('vendor/some-dep/package.json', '{}');
-      writeFile('vendor/some-dep/src/lib.go', '');
-
-      const boundaries = await detectServiceBoundaries(tmpDir);
-
-      const paths = boundaries.map((b) => b.servicePath);
-      expect(paths).toContain('services/auth');
-      expect(paths).not.toContain('vendor/some-dep');
-    });
-
-    it('test_detect_skips_target_directory', async () => {
-      writeFile('services/api/go.mod', 'module api');
-      writeFile('services/api/main.go', '');
-      writeFile('target/classes/Main.java', '');
-      writeFile('target/pom.xml', '<project/>');
-
-      const boundaries = await detectServiceBoundaries(tmpDir);
-
-      const paths = boundaries.map((b) => b.servicePath);
-      expect(paths).toContain('services/api');
-      expect(paths).not.toContain('target');
-    });
-
-    it('test_detect_skips_pycache_directory', async () => {
-      writeFile('services/ml/pyproject.toml', '[project]');
-      writeFile('services/ml/model.py', '');
-      // __pycache__ with a marker + source files — would be detected as
-      // a boundary if not excluded, since it has package.json + .py file
-      writeFile('__pycache__/package.json', '{}');
-      writeFile('__pycache__/cached.py', '');
-
-      const boundaries = await detectServiceBoundaries(tmpDir);
-
-      const paths = boundaries.map((b) => b.servicePath);
-      expect(paths).toContain('services/ml');
-      expect(paths.every((p) => !p.includes('__pycache__'))).toBe(true);
-    });
-
-    it('test_detect_skips_dotfile_directories_regression', async () => {
-      writeFile('services/api/package.json', '{}');
-      writeFile('services/api/src/index.ts', '');
-      writeFile('.hidden/package.json', '{}');
-      writeFile('.hidden/src/index.ts', '');
-
-      const boundaries = await detectServiceBoundaries(tmpDir);
-
-      const paths = boundaries.map((b) => b.servicePath);
-      expect(paths).toContain('services/api');
-      expect(paths).not.toContain('.hidden');
-    });
-
-    it('test_detect_does_not_skip_regular_source_directories', async () => {
-      writeFile('services/api/package.json', '{}');
-      writeFile('services/api/src/index.ts', '');
-
-      const boundaries = await detectServiceBoundaries(tmpDir);
-
-      expect(boundaries).toHaveLength(1);
-      expect(boundaries[0].serviceName).toBe('api');
-    });
-```
-
- [ ] **Step 2: Run tests to verify `vendor` and `target` tests fail**
-
-Run: `cd gitnexus && npx vitest run test/unit/group/service-boundary-detector.test.ts`
-Expected: `test_detect_skips_vendor_directory` and `test_detect_skips_target_directory` FAIL (vendor/target not excluded). Other new tests may pass since dotfile exclusion already exists.
-
- [ ] **Step 3: Add EXCLUDED_DIRS constant and update both walking functions**
-
-In `gitnexus/src/core/group/service-boundary-detector.ts`:
-
-After `SOURCE_EXTENSIONS` (after line 51), add:
-
-```typescript
-const EXCLUDED_DIRS = new Set([
-  'node_modules',
-  'vendor',
-  'target',
-  'build',
-  'dist',
-  '__pycache__',
-  '.venv',
-  'venv',
-  '.tox',
-  '.mypy_cache',
-  '.gradle',
-  '.mvn',
-  'out',
-  'bin',
-]);
-```
-
-In `walkForBoundaries`, replace line 78:
-```typescript
-    if (entry.name.startsWith('.') || entry.name === 'node_modules') continue;
-```
-with:
-```typescript
-    if (entry.name.startsWith('.') || EXCLUDED_DIRS.has(entry.name)) continue;
-```
-
-In `hasSourceFilesInSubdirs`, replace line 130:
-```typescript
-      if (entry.isDirectory() && !entry.name.startsWith('.') && entry.name !== 'node_modules') {
-```
-with:
-```typescript
-      if (entry.isDirectory() && !entry.name.startsWith('.') && !EXCLUDED_DIRS.has(entry.name)) {
-```
-
- [ ] **Step 4: Run tests to verify they pass**
-
-Run: `cd gitnexus && npx vitest run test/unit/group/service-boundary-detector.test.ts`
-Expected: ALL PASS
-
- [ ] **Step 5: Commit**
-
-```bash
-cd gitnexus && git add src/core/group/service-boundary-detector.ts test/unit/group/service-boundary-detector.test.ts
-git commit -m "fix(group): add directory exclusions to service boundary detector
-
-Add EXCLUDED_DIRS set: vendor, target, build, dist, __pycache__,
-.venv, venv, .tox, .mypy_cache, .gradle, .mvn, out, bin.
-Applied in walkForBoundaries and hasSourceFilesInSubdirs.
-Replaces inline node_modules check.
-
-Addresses PR #626 review item 3 (HIGH).
-
-Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>"
-```
-
---
-
-### Task 3: Remove Double-Close of LadybugDB Pools
-
-**Files:**
- Modify: `gitnexus/src/cli/group.ts:160` (remove import), `:187-189` (remove finally block body)
- Test: `gitnexus/test/unit/group/sync.test.ts` (add pool cleanup test)
- Test: `gitnexus/test/integration/group/group-cli.test.ts` (verify no blanket close in source)
-
- [ ] **Step 1: Write unit tests for per-id pool cleanup in sync.ts**
-
-Add to `gitnexus/test/unit/group/sync.test.ts`, inside the existing `describe('syncGroup', ...)`:
-
-```typescript
-  it('test_syncGroup_closes_only_opened_pools', async () => {
-    const config = makeConfig({
-      'app/backend': 'backend-repo',
-      'app/frontend': 'frontend-repo',
-    });
-
-    const closedIds: string[] = [];
-
-    // Mock initLbug/closeLbug via per-repo override that tracks pool lifecycle
-    const { vi } = await import('vitest');
-    const poolAdapter = await import('../../../src/core/lbug/pool-adapter.js');
-    const initSpy = vi.spyOn(poolAdapter, 'initLbug').mockResolvedValue(undefined);
-    const closeSpy = vi.spyOn(poolAdapter, 'closeLbug').mockImplementation(async (id?: string) => {
-      if (id) closedIds.push(id);
-    });
-
-    try {
-      await syncGroup(config, {
-        resolveRepoHandle: async (_name, groupPath) => ({
-          id: groupPath.replace(/\//g, '-'),
-          path: groupPath,
-          repoPath: '/tmp/' + groupPath,
-          storagePath: '/tmp/' + groupPath + '/.gitnexus',
-        }),
-        skipWrite: true,
-      }).catch(() => {});
-      // Regardless of extraction errors, closeLbug should be called per id
-      // closeLbug should only receive specific pool ids, never undefined/empty
-      for (const id of closedIds) {
-        expect(id).toBeTruthy();
-        expect(typeof id).toBe('string');
-      }
-      // No blanket close (no-arg call)
-      const blanketCalls = closeSpy.mock.calls.filter((args) => args.length === 0 || !args[0]);
-      expect(blanketCalls).toHaveLength(0);
-    } finally {
-      initSpy.mockRestore();
-      closeSpy.mockRestore();
-    }
-  });
-```
-
- [ ] **Step 2: Run sync unit test to verify it passes (sync.ts already does per-id cleanup)**
-
-Run: `cd gitnexus && npx vitest run test/unit/group/sync.test.ts`
-Expected: PASS — sync.ts already cleans up correctly. This test locks the behavior.
-
- [ ] **Step 3: Write test verifying CLI source has no blanket closeLbug()**
-
-Add to `gitnexus/test/integration/group/group-cli.test.ts`:
-
-```typescript
-  it('test_sync_command_source_does_not_call_blanket_closeLbug', () => {
-    const cliGroupPath = path.join(repoRoot, 'src', 'cli', 'group.ts');
-    const source = fs.readFileSync(cliGroupPath, 'utf-8');
-
-    // closeLbug() without arguments (blanket close) must not appear.
-    // closeLbug(id) with argument is fine (that's in sync.ts, not here).
-    // Match closeLbug() but not closeLbug(someArg)
-    const blanketClosePattern = /closeLbug\s*\(\s*\)/;
-    expect(source).not.toMatch(blanketClosePattern);
-  });
-```
-
- [ ] **Step 4: Run test to verify it fails**
-
-Run: `cd gitnexus && npx vitest run test/integration/group/group-cli.test.ts`
-Expected: FAIL — `closeLbug()` (no args) exists at line 188.
-
- [ ] **Step 5: Remove blanket closeLbug() from cli/group.ts**
-
-In `gitnexus/src/cli/group.ts`:
-
-Remove the `closeLbug` import at line 160:
-```typescript
-      const { closeLbug } = await import('../core/lbug/pool-adapter.js');
-```
-
-Replace the try/finally wrapper (lines 162-189):
-```typescript
-      try {
-        const groupDir = getGroupDir(getDefaultGitnexusDir(), name);
-        const config = await loadGroupConfig(groupDir);
-
-        console.log(`Syncing group "${name}" (${Object.keys(config.repos).length} repos)...\n`);
-
-        const result = await syncGroup(config, {
-          groupDir,
-          allowStale: Boolean(opts.allowStale),
-          verbose: Boolean(opts.verbose),
-          skipEmbeddings: Boolean(opts.skipEmbeddings),
-          exactOnly: Boolean(opts.exactOnly),
-        });
-
-        if (opts.json) {
-          console.log(JSON.stringify(result, null, 2));
-        } else {
-          console.log(`\nMatching cascade:`);
-          const exactLinks = result.crossLinks.filter((l) => l.matchType === 'exact');
-          console.log(`  exact:     ${exactLinks.length} cross-links (confidence 1.0)`);
-          console.log(`  unmatched: ${result.unmatched.length} contracts`);
-          console.log(
-            `\nWrote contracts.json (${result.contracts.length} contracts, ${result.crossLinks.length} cross-links)`,
-          );
-        }
-      } finally {
-        await closeLbug().catch(() => {});
-      }
-```
-
-Becomes (remove try/finally entirely, since sync.ts handles its own cleanup):
-```typescript
-        const groupDir = getGroupDir(getDefaultGitnexusDir(), name);
-        const config = await loadGroupConfig(groupDir);
-
-        console.log(`Syncing group "${name}" (${Object.keys(config.repos).length} repos)...\n`);
-
-        const result = await syncGroup(config, {
-          groupDir,
-          allowStale: Boolean(opts.allowStale),
-          verbose: Boolean(opts.verbose),
-          skipEmbeddings: Boolean(opts.skipEmbeddings),
-          exactOnly: Boolean(opts.exactOnly),
-        });
-
-        if (opts.json) {
-          console.log(JSON.stringify(result, null, 2));
-        } else {
-          console.log(`\nMatching cascade:`);
-          const exactLinks = result.crossLinks.filter((l) => l.matchType === 'exact');
-          console.log(`  exact:     ${exactLinks.length} cross-links (confidence 1.0)`);
-          console.log(`  unmatched: ${result.unmatched.length} contracts`);
-          console.log(
-            `\nWrote contracts.json (${result.contracts.length} contracts, ${result.crossLinks.length} cross-links)`,
-          );
-        }
-```
-
- [ ] **Step 6: Run tests to verify they pass**
-
-Run: `cd gitnexus && npx vitest run test/integration/group/group-cli.test.ts test/unit/group/sync.test.ts`
-Expected: ALL PASS
-
- [ ] **Step 7: Commit**
-
-```bash
-cd gitnexus && git add src/cli/group.ts test/integration/group/group-cli.test.ts test/unit/group/sync.test.ts
-git commit -m "fix(group): remove blanket closeLbug() from CLI sync command
-
-sync.ts already closes pools per-id in its finally block.
-The blanket closeLbug() in cli/group.ts tears down ALL active pools
-including unrelated ones in MCP server context.
-
-Addresses PR #626 review item 4 (HIGH).
-
-Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>"
-```
-
---
-
-### Task 4: gRPC Proto Regex — Brace-Depth Counter
-
-**Files:**
- Modify: `gitnexus/src/core/group/extractors/grpc-extractor.ts:101-130` (parseProtoFile)
- Test: `gitnexus/test/unit/group/grpc-extractor.test.ts`
-
- [ ] **Step 1: Write failing tests for nested braces in proto services**
-
-Add this describe block inside the existing `proto file parsing` describe in `gitnexus/test/unit/group/grpc-extractor.test.ts`:
-
-```typescript
-    it('test_extract_proto_with_google_api_http_nested_braces', async () => {
-      writeFile(
-        'api/gateway.proto',
-        `syntax = "proto3";
-package gateway.v1;
-
-import "google/api/annotations.proto";
-
-service GatewayService {
-  rpc GetUser (GetUserRequest) returns (UserResponse) {
-    option (google.api.http) = {
-      get: "/v1/users/{user_id}"
-    };
-  }
-  rpc CreateUser (CreateUserRequest) returns (UserResponse) {
-    option (google.api.http) = {
-      post: "/v1/users"
-      body: "*"
-    };
-  }
-}`,
-      );
-
-      const contracts = await extractor.extract(null, tmpDir, makeRepo(tmpDir));
-      const providers = contracts.filter(
-        (c) => c.role === 'provider' && c.symbolRef.filePath === 'api/gateway.proto',
-      );
-
-      expect(providers).toHaveLength(2);
-      const ids = providers.map((c) => c.contractId).sort();
-      expect(ids).toEqual([
-        'grpc::gateway.v1.GatewayService/CreateUser',
-        'grpc::gateway.v1.GatewayService/GetUser',
-      ]);
-    });
-
-    it('test_extract_proto_with_multiple_services', async () => {
-      writeFile(
-        'api/multi.proto',
-        `syntax = "proto3";
-package multi;
-
-service ServiceA {
-  rpc MethodA (Req) returns (Res);
-}
-
-service ServiceB {
-  rpc MethodB1 (Req) returns (Res);
-  rpc MethodB2 (Req) returns (Res);
-}`,
-      );
-
-      const contracts = await extractor.extract(null, tmpDir, makeRepo(tmpDir));
-      const providers = contracts.filter(
-        (c) => c.role === 'provider' && c.symbolRef.filePath === 'api/multi.proto',
-      );
-
-      expect(providers).toHaveLength(3);
-      const ids = providers.map((c) => c.contractId).sort();
-      expect(ids).toEqual([
-        'grpc::multi.ServiceA/MethodA',
-        'grpc::multi.ServiceB/MethodB1',
-        'grpc::multi.ServiceB/MethodB2',
-      ]);
-    });
-
-    it('test_extract_proto_with_nested_option_blocks_in_rpc', async () => {
-      writeFile(
-        'api/nested.proto',
-        `syntax = "proto3";
-package nested;
-
-service DeepService {
-  rpc DeepMethod (Req) returns (Res) {
-    option (google.api.http) = {
-      post: "/v1/deep"
-      body: "*"
-      additional_bindings {
-        get: "/v1/deep/{id}"
-      }
-    };
-  }
-}`,
-      );
-
-      const contracts = await extractor.extract(null, tmpDir, makeRepo(tmpDir));
-      const providers = contracts.filter(
-        (c) => c.role === 'provider' && c.symbolRef.filePath === 'api/nested.proto',
-      );
-
-      expect(providers).toHaveLength(1);
-      expect(providers[0].contractId).toBe('grpc::nested.DeepService/DeepMethod');
-    });
-
-    it('test_extract_proto_malformed_unclosed_brace_skips_service', async () => {
-      writeFile(
-        'api/broken.proto',
-        `syntax = "proto3";
-package broken;
-
-service IncompleteService {
-  rpc SomeMethod (Req) returns (Res);
-  // Missing closing brace — EOF before depth returns to 0
-`,
-      );
-
-      // Should not throw; incomplete service is silently skipped
-      const contracts = await extractor.extract(null, tmpDir, makeRepo(tmpDir));
-      const providers = contracts.filter(
-        (c) => c.role === 'provider' && c.symbolRef.filePath === 'api/broken.proto',
-      );
-
-      // The old regex would find partial match; the new parser should skip it
-      expect(providers).toHaveLength(0);
-    });
-```
-
- [ ] **Step 2: Run tests to verify the nested brace test fails**
-
-Run: `cd gitnexus && npx vitest run test/unit/group/grpc-extractor.test.ts`
-Expected: `test_extract_proto_with_google_api_http_nested_braces` FAIL — regex stops at first `}` inside the `option` block.
-
- [ ] **Step 3: Replace serviceRe regex with extractServiceBlocks function**
-
-In `gitnexus/src/core/group/extractors/grpc-extractor.ts`, replace the `parseProtoFile` method (lines 101-130):
-
-```typescript
-  private parseProtoFile(content: string, filePath: string): ExtractedContract[] {
-    const out: ExtractedContract[] = [];
-
-    const pkgMatch = content.match(/^package\s+([\w.]+)\s*;/m);
-    const pkg = pkgMatch ? pkgMatch[1] : '';
-
-    for (const { name: serviceName, body } of extractServiceBlocks(content)) {
-      const rpcRe = /rpc\s+(\w+)\s*\(/g;
-      let rpcMatch: RegExpExecArray | null;
-      while ((rpcMatch = rpcRe.exec(body)) !== null) {
-        const methodName = rpcMatch[1];
-        const cid = contractId(pkg, serviceName, methodName);
-        out.push(
-          makeContract(cid, 'provider', filePath, `${serviceName}.${methodName}`, 0.85, {
-            package: pkg,
-            service: serviceName,
-            method: methodName,
-            source: 'proto',
-          }),
-        );
-      }
-    }
-
-    return out;
-  }
-```
-
-Add this function before the class (e.g. after `serviceOnlyContractId`, around line 26):
-
-```typescript
-function extractServiceBlocks(content: string): Array<{ name: string; body: string }> {
-  const results: Array<{ name: string; body: string }> = [];
-  const headerRe = /service\s+(\w+)\s*\{/g;
-  let headerMatch: RegExpExecArray | null;
-
-  while ((headerMatch = headerRe.exec(content)) !== null) {
-    const serviceName = headerMatch[1];
-    const bodyStart = headerMatch.index + headerMatch[0].length;
-    let depth = 1;
-    let pos = bodyStart;
-
-    while (pos < content.length && depth > 0) {
-      const ch = content[pos];
-      if (ch === '{') depth++;
-      else if (ch === '}') depth--;
-      pos++;
-    }
-
-    // If EOF before depth returns to 0, skip incomplete service
-    if (depth !== 0) continue;
-
-    // body is between opening { (consumed by regex) and closing } (pos is one past it)
-    const body = content.slice(bodyStart, pos - 1);
-    results.push({ name: serviceName, body });
-  }
-
-  return results;
-}
-```
-
- [ ] **Step 4: Run tests to verify they pass**
-
-Run: `cd gitnexus && npx vitest run test/unit/group/grpc-extractor.test.ts`
-Expected: ALL PASS (including existing regression tests)
-
- [ ] **Step 5: Commit**
-
-```bash
-cd gitnexus && git add src/core/group/extractors/grpc-extractor.ts test/unit/group/grpc-extractor.test.ts
-git commit -m "fix(group): replace gRPC proto regex with brace-depth counter
-
-The serviceRe regex used [^}]* which stopped at the first '}'.
-Proto services with google.api.http annotations contain nested {}
-blocks, causing methods to be missed.
-
-New extractServiceBlocks() uses a brace-depth counter (init depth=1
-after opening {, scan char-by-char). Malformed protos with unclosed
-braces are silently skipped.
-
-Addresses PR #626 review item 2 (HIGH).
-
-Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>"
-```
-
---
-
-### Task 5: Run Full Test Suite
-
- [ ] **Step 1: Run all group-related tests**
-
-Run: `cd gitnexus && npx vitest run test/unit/group/ test/integration/group/`
-Expected: ALL PASS
-
- [ ] **Step 2: Run full test suite to catch regressions**
-
-Run: `cd gitnexus && npx vitest run`
-Expected: ALL PASS, 0 failures
-
- [ ] **Step 3: Run typecheck**
-
-Run: `cd gitnexus && npx tsc --noEmit`
-Expected: No errors
-
---
-
-### Task 6: CLI Integration Smoke Test
-
- [ ] **Step 1: Add CLI smoke test for path traversal**
-
-Add to `gitnexus/test/integration/group/group-cli.test.ts` inside the existing `group CLI` describe:
-
-```typescript
-  it('test_create_with_invalid_name_fails', () => {
-    const result = runGroup(['create', '../../evil']);
-    expect(result.status).not.toBe(0);
-    expect(result.stderr).toContain('Invalid group name');
-  });
-```
-
- [ ] **Step 2: Run test**
-
-Run: `cd gitnexus && npx vitest run test/integration/group/group-cli.test.ts`
-Expected: ALL PASS
-
- [ ] **Step 3: Commit**
-
-```bash
-cd gitnexus && git add test/integration/group/group-cli.test.ts
-git commit -m "test(group): add CLI smoke test for path traversal rejection
-
-Verifies that 'group create ../../evil' fails with Invalid group name.
-
-Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>"
-```
@@ -1,175 +0,0 @@
-# PR #626 HIGH-Priority Fixes Design
-
-**Date:** 2026-04-02
-**PR:** abhigyanpatwari/GitNexus#626 — Intra-repo service communication tracking
-**Scope:** 4 HIGH-priority issues identified by abhigyanpatwari and xkonjin
-**Approach:** Minimal targeted fixes (option A) — no refactoring, no scope creep
-
---
-
-## Fix 1: Path Traversal via Group Name
-
-**File:** `gitnexus/src/core/group/storage.ts`
-**Risk:** A group name like `../../etc` creates directories outside the intended path.
-
-### Solution
-
-Add `validateGroupName(name: string): void` that enforces `/^[a-zA-Z0-9][a-zA-Z0-9_-]*$/`.
-
- Call in `createGroupDir` (primary entry point)
- Call in `getGroupDir` (defense in depth)
- Throw descriptive error on invalid names
-
-**Legacy:** Groups already on disk with names outside this pattern are not auto-renamed; only new `create` / resolved paths are validated.
-
-### Why regex over path.resolve + startsWith
-
- abhigyanpatwari explicitly requested `[a-zA-Z0-9_-]`
- Stricter: disallows spaces, dots, Unicode edge cases
- Simpler to reason about
-
-### Tests
-
- `../../evil` throws
- `foo/bar` throws
- Empty string throws
- `my-group_01` passes
- `A` (single char) passes
- CLI smoke: one integration test that hits `getGroupDir` / `createGroupDir` (e.g. `group create` or `group add`) with an invalid name proves wiring for every subcommand that resolves a group through storage
-
-### CLI/API entry points accepting groupName
-
-All paths flow through `getGroupDir` (which validates), so coverage is implicit. For reference:
-
-| Command | Entry | Calls |
-|---------|-------|-------|
-| `group create` | `cli/group.ts` action | `createGroupDir` -> `getGroupDir` |
-| `group add` | `cli/group.ts` action | `getGroupDir` |
-| `group remove` | `cli/group.ts` action | `getGroupDir` |
-| `group list` | `cli/group.ts` action | reads `groups/` dir directly — no traversal risk (reads, not writes) |
-| `group status` | `cli/group.ts` action | `getGroupDir` |
-| `group sync` | `cli/group.ts` action | `getGroupDir` |
-
-**`listGroups`:** Reads directory names from disk without validation. Not a write path, so no traversal risk. May surface manually-created directories with non-conforming names — accepted as-is, not in scope.
-
---
-
-## Fix 2: gRPC Proto Regex -> Brace-Depth Counter
-
-**File:** `gitnexus/src/core/group/extractors/grpc-extractor.ts`
-**Risk:** `serviceRe = /service\s+(\w+)\s*\{([^}]*)}/gs` stops at first `}`. Proto services with `google.api.http` annotations inside RPCs contain nested `{ }` blocks.
-
-### Solution
-
-Replace `serviceRe` regex with `extractServiceBlocks(content: string): Array<{ name: string; body: string }>`:
-
-1. Use regex only to find `service <Name> {` start positions (regex consumes the opening `{`)
-2. Initialise depth to 1 immediately after the opening `{`
-3. Scan forward char by char: `{` -> depth++, `}` -> depth--; collect into body
-4. Stop when depth reaches 0 (the matching closing `}`)
-5. Return name + body pairs
-
-Inner `rpcRe` regex remains unchanged — it operates on the already-extracted body.
-
-**Malformed input:** If EOF is reached before `depth` returns to 0, skip the incomplete service (do not add to results). Lock this in the test.
-
-**Scope limitation (v1):** Brace-depth only — no lexer for string literals or comments containing `{`/`}`. Sufficient for `google.api.http` annotations. Known false positive: braces inside `//` comments or quoted strings within proto options. Accepted for v1; a proper proto lexer is out of scope.
-
-### Tests
-
- Proto with single service, no nesting (regression)
- Proto with `google.api.http` nested braces inside RPC options
- Proto with multiple services
- Proto with nested `option` blocks inside RPC (e.g. `google.api.http`)
- Malformed proto with unclosed brace (graceful handling)
-
---
-
-## Fix 3: Directory Exclusions in Service Boundary Detector
-
-**File:** `gitnexus/src/core/group/service-boundary-detector.ts`
-**Risk:** Walks entire repo tree, only skipping dotfiles and `node_modules`. Extremely slow on repos with `vendor/`, `target/`, `__pycache__/`, `.venv/`.
-
-### Solution
-
-Create `EXCLUDED_DIRS` as a `Set<string>` (alongside existing `SERVICE_MARKERS`, `SOURCE_EXTENSIONS`), for example:
-
-```text
-node_modules, vendor, target, build, dist,
-__pycache__, .venv, venv, .tox, .mypy_cache,
-.gradle, .mvn, out, bin
-```
-
-(Implement as `new Set([...])` — the list above is the membership, not a string literal.)
-
-Apply in both:
- `walkForBoundaries` (line 77-78) — replace current inline `=== 'node_modules'` check with `EXCLUDED_DIRS.has(entry.name)`
- `hasSourceFilesInSubdirs` (line 130) — replace `entry.name !== 'node_modules'` with `!EXCLUDED_DIRS.has(entry.name)`
-
-Note: remove the old `=== 'node_modules'` literal from both locations — it is covered by `EXCLUDED_DIRS`.
-Dotfile exclusion (`.` prefix) remains as a separate check since it's a pattern, not a name.
-Exclusions apply only to `isDirectory()` entries — file names are never checked against `EXCLUDED_DIRS`.
-
-**Tradeoff:** Rare layouts that keep source under names like `out/` or `bin/` will be skipped; accepted for performance on typical monorepos.
-
-**Case sensitivity:** `Set.has` is case-sensitive (matches current `=== 'node_modules'` behavior). Windows case-insensitive FS not handled — accepted as-is, consistent with existing code.
-
-### Tests
-
- Directory named `vendor/` is skipped
- Directory named `target/` is skipped
- Directory named `__pycache__/` is skipped
- Regular source directories are NOT skipped
- Dotfile directories still skipped (regression)
-
---
-
-## Fix 4: Double-Close of LadybugDB Pools
-
-**Files:**
- `gitnexus/src/core/group/sync.ts` (lines 155-157) — per-id cleanup (KEEP)
- `gitnexus/src/cli/group.ts` (line 188) — blanket `closeLbug()` (REMOVE)
-
-**Risk:** In MCP server context, `closeLbug()` without arguments tears down ALL active pools, including ones from unrelated operations.
-
-### Solution
-
-Remove the `closeLbug()` call (no arguments) from `cli/group.ts` finally block. The per-id cleanup in `sync.ts` is sufficient:
-
-```typescript
-// sync.ts — KEEP: cleans up only pools opened by this sync
-finally {
-  for (const id of [...new Set(openPoolIds)]) {
-    await closeLbug(id).catch(() => {});
-  }
-}
-```
-
-```typescript
-// cli/group.ts — REMOVE: blanket close that kills all pools
-finally {
-  await closeLbug().catch(() => {});  // DELETE THIS
-}
-```
-
-Remove the `closeLbug` import from `cli/group.ts` — after removing the `finally` call it has no remaining usages.
-
-### Tests (unit level — mock pool adapter)
-
- `syncGroup` closes only the pools it opened (mock `closeLbug`, assert called with specific ids)
- Two-pool scenario: sync opens pools A and B, both closed in finally; pool C (opened elsewhere) not touched
- CLI `sync` command does not call blanket `closeLbug()` (verify no zero-arg call in source — static check or grep-based test)
-
---
-
-## Out of Scope
-
- JSON -> LadybugDB migration (tracked in #606)
- MEDIUM/LOW issues (items 5-10 from review summary)
- Test gap coverage beyond what's needed for these 4 fixes
- Any refactoring or architectural changes
-
-## Execution Order
-
-Fixes are independent — can be implemented in parallel or any order.
-Recommended order for review clarity: 1 -> 3 -> 4 -> 2 (simplest to most complex).
@@ -0,0 +1,95 @@
+/**
+ * Custom ESLint rule: require `parseSourceSafe(parser, content, ...)` instead
+ * of direct `<parser>.parse(<content>, ...)` calls.
+ *
+ * Background: tree-sitter's Node.js native binding crashes with SIGSEGV on
+ * Windows when handed a JS string longer than 32 767 chars. The crash happens
+ * inside the binding's V8 string-to-buffer conversion and cannot be intercepted
+ * by JavaScript `try/catch`. `parseSourceSafe` (in
+ * `gitnexus/src/core/tree-sitter/safe-parse.ts`) routes large inputs through
+ * the chunked-callback overload of `parser.parse(input, ...)` which bypasses
+ * the broken conversion path. PR #1433 fixed every direct call site at the
+ * time; this rule prevents new direct calls from creeping in.
+ *
+ * The rule is auto-fixable for the call-site rewrite. It does NOT auto-add the
+ * import (computing the correct relative path per file is brittle); after the
+ * call rewrite runs, the consumer file's `tsc` will complain about an
+ * undefined identifier and the developer adds the import. This is the same
+ * tradeoff `unused-imports/no-unused-imports` makes in the opposite direction.
+ *
+ * False-positive suppression:
+ * - Skips calls whose receiver is a known non-tree-sitter library (`JSON`,
+ *   `URL`, `marked`, `Number`).
+ * - Skips calls whose first argument is a string-literal (grammar-load smoke
+ *   tests like `_testParser.parse('service X { rpc Y (R) returns (R); }')`).
+ * - Skips test files (`.test.ts`/`.test.tsx`/`.spec.ts`).
+ * - Skips the `safe-parse.ts` helper itself.
+ */
+
+const SKIPPED_RECEIVERS = new Set(['JSON', 'URL', 'marked', 'Number', 'Math']);
+
+export default {
+  meta: {
+    type: 'problem',
+    docs: {
+      description:
+        'Require parseSourceSafe instead of direct tree-sitter `<parser>.parse(content, ...)` calls (Windows SIGSEGV protection)',
+      recommended: true,
+    },
+    fixable: 'code',
+    schema: [],
+    messages: {
+      useSafeParse:
+        'Direct `{{receiver}}.parse(...)` can SIGSEGV on Windows for inputs > 32 767 chars (uncatchable from JS). Use `parseSourceSafe({{receiver}}, ...)` from `core/tree-sitter/safe-parse.js`. Auto-fix rewrites the call; add the missing import yourself.',
+    },
+  },
+  create(context) {
+    const filename = context.filename ?? context.getFilename();
+    // Don't lint the helper itself or test files.
+    if (filename.includes('safe-parse')) return {};
+    if (/[.](?:test|spec)\.tsx?$/.test(filename)) return {};
+
+    const sourceCode = context.sourceCode ?? context.getSourceCode();
+
+    return {
+      CallExpression(node) {
+        const callee = node.callee;
+        if (callee.type !== 'MemberExpression') return;
+        if (callee.computed) return;
+        if (callee.property.type !== 'Identifier') return;
+        if (callee.property.name !== 'parse') return;
+
+        // Skip known non-tree-sitter receivers.
+        if (callee.object.type === 'Identifier' && SKIPPED_RECEIVERS.has(callee.object.name)) {
+          return;
+        }
+
+        // Smoke tests pass a string literal directly; those are trivially safe.
+        const firstArg = node.arguments[0];
+        if (!firstArg) return;
+        if (firstArg.type === 'Literal' && typeof firstArg.value === 'string') return;
+        if (firstArg.type === 'TemplateLiteral' && firstArg.expressions.length === 0) return;
+
+        const receiverText = sourceCode.getText(callee.object);
+        // Receiver-text-shape skip: anything matching well-known JS APIs that
+        // happen to have a `.parse(<expr>)` shape but aren't tree-sitter.
+        if (
+          /^(JSON|URL|marked|Number|Math|Date|globalThis\.JSON)\b/.test(receiverText) ||
+          /\bjson\.parse\b/i.test(receiverText)
+        ) {
+          return;
+        }
+
+        context.report({
+          node,
+          messageId: 'useSafeParse',
+          data: { receiver: receiverText },
+          fix(fixer) {
+            const argsText = node.arguments.map((arg) => sourceCode.getText(arg)).join(', ');
+            return fixer.replaceText(node, `parseSourceSafe(${receiverText}, ${argsText})`);
+          },
+        });
+      },
+    };
+  },
+};
@@ -3,6 +3,47 @@ import tsParser from '@typescript-eslint/parser';
 import unusedImports from 'eslint-plugin-unused-imports';
 import reactHooks from 'eslint-plugin-react-hooks';
 import prettierConfig from 'eslint-config-prettier';
+import requireSafeParse from './eslint-rules/require-safe-parse.mjs';
+
+// Local plugin hosting custom rules that enforce GitNexus-specific invariants
+// (currently: the Windows-SIGSEGV-safe parser entrypoint).
+const gitnexusLocalPlugin = {
+  rules: {
+    'require-safe-parse': requireSafeParse,
+  },
+};
+
+// Selectors that protect MCP-reachable code from corrupting the JSON-RPC
+// stdio frame stream. The MCP-reachable block below uses these directly;
+// the lbug-adapter file-specific block must spread them in too because
+// ESLint flat config REPLACES (not merges) `no-restricted-syntax` when
+// multiple matching configs target the same file. Extracting to a const
+// makes the dependency mechanical instead of documentation-enforced.
+const mcpStdoutWriteSelectors = [
+  {
+    selector:
+      "MemberExpression[object.type='MemberExpression'][object.object.name='process'][object.property.name='stdout'][property.name='write']",
+    message:
+      'Direct process.stdout.write is forbidden in MCP-reachable code. Route diagnostics through console.error or process.stderr.write — the MCP stdio transport owns stdout for JSON-RPC frames.',
+  },
+  {
+    selector:
+      "CallExpression[callee.type='MemberExpression'][callee.object.type='MemberExpression'][callee.object.object.name='process'][callee.object.property.name='stdout'][callee.property.name='write']",
+    message:
+      'Direct process.stdout.write is forbidden in MCP-reachable code. Route diagnostics through console.error or process.stderr.write — the MCP stdio transport owns stdout for JSON-RPC frames.',
+  },
+  {
+    // Catches the canonical destructuring shape:
+    //   const { write } = process.stdout;
+    // (and any other ObjectPattern destructure rooted at process.stdout)
+    // which would otherwise capture a reference to the original write
+    // and bypass the sentinel.
+    selector:
+      "VariableDeclarator[init.type='MemberExpression'][init.object.name='process'][init.property.name='stdout'] > ObjectPattern",
+    message:
+      'Destructuring process.stdout is forbidden in MCP-reachable code — bypasses the sentinel. Use process.stderr.write for diagnostics.',
+  },
+];

 export default [
  // Global ignores
@@ -14,6 +55,7 @@ export default [
      'gitnexus/vendor/**',
      'gitnexus-web/src/vendor/**',
      'gitnexus/test/fixtures/**',
+      'gitnexus-web/test/fixtures/**',
      'gitnexus-web/playwright-report/**',
      'gitnexus-web/test-results/**',
      '**/*.d.ts',
@@ -58,11 +100,64 @@ export default [
    },
  },

-  // CLI package — allow console.log (it's a CLI tool)
+  // CLI/server packages — `console.log` IS the contract (CLI tool data output
+  // on stdout, e.g. `gitnexus query | jq`; server pretty-printed banners).
+  // Diagnostic logging (`warn`/`error`/`debug`/`info`) goes through pino like
+  // the rest of the codebase.
  {
    files: ['gitnexus/src/cli/**/*.ts', 'gitnexus/src/server/**/*.ts'],
    rules: {
-      'no-console': 'off',
+      'no-console': ['error', { allow: ['log'] }],
+    },
+  },
+
+  // Forcing function for the pino migration. Severity is `error` — the
+  // codebase-wide migration is complete; new `console.*` in core source
+  // must fail lint. CLI/server are exempt above (legitimate stdout output).
+  // Tests, bin scripts, and the logger module itself remain exempt.
+  {
+    files: ['gitnexus/src/**/*.ts'],
+    ignores: ['gitnexus/src/cli/**', 'gitnexus/src/server/**', 'gitnexus/src/core/logger.ts'],
+    rules: {
+      'no-console': 'error',
+    },
+  },
+
+  // MCP-reachable code: forbid stdout-corrupting writes. The MCP stdio
+  // transport writes JSON-RPC frames to stdout; per the spec, the server
+  // MUST NOT write anything to stdout that is not a valid MCP message.
+  // Diagnostics must go to stderr (console.error). Direct process.stdout.write
+  // bypasses the gate and is also forbidden in these dirs.
+  // cli/mcp.ts is included here even though it lives under cli/ — it is the
+  // MCP entrypoint and inherits stricter discipline than the rest of cli/.
+  {
+    files: [
+      'gitnexus/src/mcp/**/*.ts',
+      'gitnexus/src/core/lbug/**/*.ts',
+      'gitnexus/src/core/embeddings/**/*.ts',
+      'gitnexus/src/core/tree-sitter/**/*.ts',
+      'gitnexus/src/cli/mcp.ts',
+    ],
+    rules: {
+      'no-console': ['error', { allow: ['error'] }],
+      'no-restricted-syntax': ['error', ...mcpStdoutWriteSelectors],
+    },
+  },
+
+  // Windows SIGSEGV protection: every tree-sitter parse in `core/` must route
+  // through parseSourceSafe. Direct `<parser>.parse(content, ...)` crashes on
+  // Windows for inputs > 32 767 chars (V8 string-conversion bug, uncatchable
+  // from JS). The rule auto-fixes the call site; the developer adds the
+  // missing import after the fix runs. Out of scope: tests (skipped by the
+  // rule), the helper itself (`safe-parse.ts`), and the `grpc-patterns/proto.ts`
+  // grammar-load smoke test (filtered by string-literal-arg skip in the rule).
+  {
+    files: ['gitnexus/src/core/**/*.ts'],
+    plugins: {
+      gitnexus: gitnexusLocalPlugin,
+    },
+    rules: {
+      'gitnexus/require-safe-parse': 'error',
    },
  },

@@ -78,6 +173,34 @@ export default [
    },
  },

+  // Prevent direct conn.close() / db.close() in the LadybugDB adapter (#1376).
+  // All close operations must go through safeClose() so the WAL is always
+  // flushed before the connection is released. The sole authorised call site
+  // inside safeClose itself uses an eslint-disable-next-line override.
+  //
+  // ESLint flat config REPLACES (not merges) `no-restricted-syntax` when
+  // multiple matching configs target the same file. lbug-adapter.ts is also
+  // covered by the MCP-reachable block above, so we spread the shared
+  // mcpStdoutWriteSelectors here alongside the safeClose selectors. Without
+  // this, lbug-adapter would silently lose its MCP stdout-write protection.
+  {
+    files: ['gitnexus/src/core/lbug/lbug-adapter.ts'],
+    rules: {
+      'no-restricted-syntax': [
+        'error',
+        ...mcpStdoutWriteSelectors,
+        {
+          selector: "CallExpression[callee.object.name='conn'][callee.property.name='close']",
+          message: 'Use safeClose() instead of calling conn.close() directly (#1376).',
+        },
+        {
+          selector: "CallExpression[callee.object.name='db'][callee.property.name='close']",
+          message: 'Use safeClose() instead of calling db.close() directly (#1376).',
+        },
+      ],
+    },
+  },
+
  // Disable formatting rules (prettier handles those)
  prettierConfig,
 ];
@@ -162,8 +162,8 @@ Each mode has a `system_{mode}.jinja` + `instance_{mode}.jinja` pair. The agent

 ```
 Agent → bash command → /usr/local/bin/gitnexus-query
-  → curl localhost:4848/tool/query     (fast path: eval-server, ~100ms)
-  → npx gitnexus query                 (fallback: cold CLI, ~5-10s)
+  → curl http://127.0.0.1:4848/tool/query   (fast path: eval-server, ~100ms)
+  → npx gitnexus query                       (fallback: cold CLI, ~5-10s)
 ```

 Each tool script in `/usr/local/bin/` is standalone — no sourcing, no env inheritance needed. This is critical because mini-swe-agent runs every command via `subprocess.run` in a fresh subshell.
@@ -176,6 +176,61 @@ The eval-server is a lightweight HTTP daemon that:
 - Includes next-step hints to guide tool chaining (query → context → impact → fix)
 - Auto-shuts down after idle timeout

+**CLI flags:**
+
+| Flag | Default | Purpose |
+|------|---------|---------|
+| `--port <port>` | `4848` | Port to listen on |
+| `--host <host>` | `127.0.0.1` | Bind address — use `0.0.0.0` for cross-container access |
+| `--idle-timeout <seconds>` | `0` (disabled) | Auto-shutdown after N seconds of inactivity |
+
+**READY signal:**
+
+When the server is ready, it writes to stdout:
+
+```
+# IPv4
+GITNEXUS_EVAL_SERVER_READY:127.0.0.1:4848
+
+# IPv6 (bracketed to avoid colon ambiguity)
+GITNEXUS_EVAL_SERVER_READY:[::1]:4848
+```
+
+Parse the port as the last colon-segment (`split(':').pop()`) — not `split(':')[1]`, which breaks for IPv6 and for non-loopback IPv4 hosts added in this release.
+
+### Custom port and host
+
+`run_eval.py` does not expose `--port` or `--host` as CLI flags. Configure them in your mode YAML under the `environment:` key:
+
+```yaml
+# configs/modes/native_augment.yaml (or whichever mode you're running)
+environment:
+  eval_server_port: 4849         # change if 4848 is already in use on the host
+  eval_server_host: "0.0.0.0"   # bind all interfaces — needed for cross-container setups
+```
+
+Defaults are `port: 4848` and `host: 127.0.0.1` (loopback only). Use `0.0.0.0` only when the agent container needs to reach the eval-server from a separate network namespace. The health probe and tool scripts connect via the configured bind host (defaulting to `127.0.0.1`), which is reachable for both loopback and all-interface binds.
+
+`"localhost"` is also a valid `eval_server_host` value. The OS resolves it at bind time — typically `127.0.0.1` on dual-stack or IPv4-only systems, and `::1` on IPv6-only systems. The exact result depends on your `/etc/hosts` and `gai.conf`. The READY signal will reflect the actual bound address (e.g. `GITNEXUS_EVAL_SERVER_READY:127.0.0.1:4848` or `GITNEXUS_EVAL_SERVER_READY:[::1]:4848`), not the literal string `localhost`. Use this when you want the server to bind to whichever loopback address the OS prefers rather than forcing IPv4.
+
+**Running eval-server directly in Docker / Docker Compose:**
+
+```bash
+# Bind to all interfaces so sibling containers can reach it
+gitnexus eval-server --host 0.0.0.0 --port 4848
+
+# Then probe from a sibling container via its service hostname
+curl http://eval-container:4848/health
+```
+
+If you need a non-default port (e.g. to avoid conflicts), pass `--port <port>` alongside `--host`. The READY signal will reflect both:
+
+```
+GITNEXUS_EVAL_SERVER_READY:0.0.0.0:5000
+```
+
+Parse the port as the last colon-segment (`split(':').pop()`) — safe for both IPv4 and bracketed IPv6 forms.
+
 ### Index caching

 SWE-bench repos repeat (Django has 200+ instances at different commits). The harness caches GitNexus indexes per `(repo, commit)` hash in `~/.gitnexus-eval-cache/` to avoid redundant re-indexing.
@@ -39,6 +39,7 @@ logger = logging.getLogger("gitnexus_docker")

 DEFAULT_CACHE_DIR = Path.home() / ".gitnexus-eval-cache"
 EVAL_SERVER_PORT = 4848
+EVAL_SERVER_HOST = "127.0.0.1"


 class GitNexusDockerEnvironment(DockerEnvironment):
@@ -62,6 +63,7 @@ class GitNexusDockerEnvironment(DockerEnvironment):
        skip_embeddings: bool = True,
        gitnexus_timeout: int = 120,
        eval_server_port: int = EVAL_SERVER_PORT,
+        eval_server_host: str = EVAL_SERVER_HOST,
        **kwargs,
    ):
        super().__init__(**kwargs)
@@ -70,6 +72,7 @@ class GitNexusDockerEnvironment(DockerEnvironment):
        self.skip_embeddings = skip_embeddings
        self.gitnexus_timeout = gitnexus_timeout
        self.eval_server_port = eval_server_port
+        self.eval_server_host = eval_server_host
        self.index_time: float = 0.0
        self._gitnexus_ready = False

@@ -165,22 +168,29 @@ class GitNexusDockerEnvironment(DockerEnvironment):

    def _start_eval_server(self):
        """Start the GitNexus eval-server daemon in the background."""
-        logger.info(f"Starting eval-server on port {self.eval_server_port}...")
+        logger.info(
+            f"Starting eval-server on {self.eval_server_host}:{self.eval_server_port}..."
+        )

        self.execute({
            "command": (
                f"nohup npx gitnexus eval-server --port {self.eval_server_port} "
+                f"--host {self.eval_server_host} "
                f"--idle-timeout 600 "
                f"> /tmp/gitnexus-eval-server.log 2>&1 &"
            ),
            "timeout": 5,
        })

+        # Use 127.0.0.1 for the health probe — reachable whether server binds
+        # loopback or all interfaces (0.0.0.0), avoiding DNS resolution issues.
+        health_host = "127.0.0.1"
+
        # Wait for the server to be ready (up to ~15s for KuzuDB init)
        for i in range(EVAL_SERVER_HEALTH_RETRIES):
            time.sleep(EVAL_SERVER_HEALTH_INTERVAL_SECONDS)
            health = self.execute({
-                "command": f"curl -sf http://127.0.0.1:{self.eval_server_port}/health 2>/dev/null || echo 'NOT_READY'",
+                "command": f"curl -sf http://{health_host}:{self.eval_server_port}/health 2>/dev/null || echo 'NOT_READY'",
                "timeout": EVAL_SERVER_HEALTH_TIMEOUT_SECONDS,
            })
            output = health.get("output", "").strip()
@@ -201,7 +211,7 @@ class GitNexusDockerEnvironment(DockerEnvironment):
        )

    @staticmethod
-    def _render_tool_script(spec: ToolScriptSpec, port: str) -> str:
+    def _render_tool_script(spec: ToolScriptSpec, port: str, host: str = EVAL_SERVER_HOST) -> str:
        """
        Render a standalone bash script for a GitNexus tool.

@@ -212,6 +222,7 @@ class GitNexusDockerEnvironment(DockerEnvironment):

        if spec.endpoint:
            lines.append(f'PORT="${{GITNEXUS_EVAL_PORT:-{port}}}"')
+            lines.append(f'HOST="${{GITNEXUS_EVAL_HOST:-{host}}}"')

        if spec.header:
            lines.append(spec.header.strip())
@@ -221,7 +232,7 @@ class GitNexusDockerEnvironment(DockerEnvironment):

        if spec.endpoint:
            lines.append(
-                f'result=$(curl -sf -X POST "http://127.0.0.1:${{PORT}}{spec.endpoint}" '
+                f'result=$(curl -sf -X POST "http://${{HOST}}:${{PORT}}{spec.endpoint}" '
                '-H "Content-Type: application/json" -d "$payload" 2>/dev/null)'
            )
            lines.append('if [ $? -eq 0 ] && [ -n "$result" ]; then echo "$result"; exit 0; fi')
@@ -244,9 +255,10 @@ class GitNexusDockerEnvironment(DockerEnvironment):
        Uses heredocs with quoted delimiter to avoid all quoting/escaping issues.
        """
        port = str(self.eval_server_port)
+        host = self.eval_server_host

        for spec in TOOL_SPECS.values():
-            script_content = self._render_tool_script(spec, port).strip()
+            script_content = self._render_tool_script(spec, port, host).strip()
            # Use heredoc with quoted delimiter — prevents all variable expansion and quoting issues
            self.execute({
                "command": (
@@ -387,5 +399,6 @@ class GitNexusDockerEnvironment(DockerEnvironment):
            "index_time_seconds": round(self.index_time, 2),
            "skip_embeddings": self.skip_embeddings,
            "eval_server_port": self.eval_server_port,
+            "eval_server_host": self.eval_server_host,
        }
        return base
@@ -6,19 +6,19 @@ readme = "README.md"
 requires-python = ">=3.11"
 dependencies = [
    "mini-swe-agent>=2.0.0",
-    "litellm>=1.50.0,!=1.82.7,!=1.82.8",
+    "litellm!=1.82.7,!=1.82.8,>=1.83.7",
    "datasets>=3.0.0",
    "typer>=0.12.0",
    "rich>=13.0.0",
    "pyyaml>=6.0",
    "pandas>=2.0.0",
    "tabulate>=0.9.0",
-    "python-dotenv>=1.0.0",
+    "python-dotenv>=1.2.2",
 ]

 [project.optional-dependencies]
 dev = [
-    "pytest>=8.0.0",
+    "pytest>=9.0.3",
    "ruff>=0.5.0",
    "hypothesis>=6.88.0",
    "coverage>=7.6.0",
@@ -21,7 +21,7 @@ wheels = [

 [[package]]
 name = "aiohttp"
-version = "3.13.3"
+version = "3.13.4"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "aiohappyeyeballs" },
@@ -32,93 +32,93 @@ dependencies = [
    { name = "propcache" },
    { name = "yarl" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/50/42/32cf8e7704ceb4481406eb87161349abb46a57fee3f008ba9cb610968646/aiohttp-3.13.3.tar.gz", hash = "sha256:a949eee43d3782f2daae4f4a2819b2cb9b0c5d3b7f7a927067cc84dafdbb9f88", size = 7844556, upload-time = "2026-01-03T17:33:05.204Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/45/4a/064321452809dae953c1ed6e017504e72551a26b6f5708a5a80e4bf556ff/aiohttp-3.13.4.tar.gz", hash = "sha256:d97a6d09c66087890c2ab5d49069e1e570583f7ac0314ecf98294c1b6aaebd38", size = 7859748, upload-time = "2026-03-28T17:19:40.6Z" }
 wheels = [
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-    { url = "https://files.pythonhosted.org/packages/3b/ab/b3226f0bd7cdcf710fbede2b3548584366da3b19b5021e74f5bde2a8fa3f/pytest-9.0.2-py3-none-any.whl", hash = "sha256:711ffd45bf766d5264d487b917733b453d917afd2b0ad65223959f59089f875b", size = 374801, upload-time = "2025-12-06T21:30:49.154Z" },
+    { url = "https://files.pythonhosted.org/packages/d4/24/a372aaf5c9b7208e7112038812994107bc65a84cd00e0354a88c2c77a617/pytest-9.0.3-py3-none-any.whl", hash = "sha256:2c5efc453d45394fdd706ade797c0a81091eccd1d6e4bccfcd476e2b8e0ab5d9", size = 375249, upload-time = "2026-04-07T17:16:16.13Z" },
 ]

 [[package]]
@@ -1900,7 +1900,7 @@ wheels = [

 [[package]]
 name = "requests"
-version = "2.32.5"
+version = "2.33.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "certifi" },
@@ -1908,9 +1908,9 @@ dependencies = [
    { name = "idna" },
    { name = "urllib3" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/c9/74/b3ff8e6c8446842c3f5c837e9c3dfcfe2018ea6ecef224c710c85ef728f4/requests-2.32.5.tar.gz", hash = "sha256:dbba0bac56e100853db0ea71b82b4dfd5fe2bf6d3754a8893c3af500cec7d7cf", size = 134517, upload-time = "2025-08-18T20:46:02.573Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/34/64/8860370b167a9721e8956ae116825caff829224fbca0ca6e7bf8ddef8430/requests-2.33.0.tar.gz", hash = "sha256:c7ebc5e8b0f21837386ad0e1c8fe8b829fa5f544d8df3b2253bff14ef29d7652", size = 134232, upload-time = "2026-03-25T15:10:41.586Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/1e/db/4254e3eabe8020b458f1a747140d32277ec7a271daf1d235b70dc0b4e6e3/requests-2.32.5-py3-none-any.whl", hash = "sha256:2462f94637a34fd532264295e186976db0f5d453d1cdd31473c85a6a161affb6", size = 64738, upload-time = "2025-08-18T20:46:00.542Z" },
+    { url = "https://files.pythonhosted.org/packages/56/5d/c814546c2333ceea4ba42262d8c4d55763003e767fa169adc693bd524478/requests-2.33.0-py3-none-any.whl", hash = "sha256:3324635456fa185245e24865e810cecec7b4caf933d7eb133dcde67d48cee69b", size = 65017, upload-time = "2026-03-25T15:10:40.382Z" },
 ]

 [[package]]
@@ -2224,7 +2224,7 @@ wheels = [

 [[package]]
 name = "typer"
-version = "0.24.1"
+version = "0.23.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "annotated-doc" },
@@ -2232,9 +2232,9 @@ dependencies = [
    { name = "rich" },
    { name = "shellingham" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/f5/24/cb09efec5cc954f7f9b930bf8279447d24618bb6758d4f6adf2574c41780/typer-0.24.1.tar.gz", hash = "sha256:e39b4732d65fbdcde189ae76cf7cd48aeae72919dea1fdfc16593be016256b45", size = 118613, upload-time = "2026-02-21T16:54:40.609Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/fd/07/b822e1b307d40e263e8253d2384cf98c51aa2368cc7ba9a07e523a1d964b/typer-0.23.1.tar.gz", hash = "sha256:2070374e4d31c83e7b61362fd859aa683576432fd5b026b060ad6b4cd3b86134", size = 120047, upload-time = "2026-02-13T10:04:30.984Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/4a/91/48db081e7a63bb37284f9fbcefda7c44c277b18b0e13fbc36ea2335b71e6/typer-0.24.1-py3-none-any.whl", hash = "sha256:112c1f0ce578bfb4cab9ffdabc68f031416ebcc216536611ba21f04e9aa84c9e", size = 56085, upload-time = "2026-02-21T16:54:41.616Z" },
+    { url = "https://files.pythonhosted.org/packages/d5/91/9b286ab899c008c2cb05e8be99814807e7fbbd33f0c0c960470826e5ac82/typer-0.23.1-py3-none-any.whl", hash = "sha256:3291ad0d3c701cbf522012faccfbb29352ff16ad262db2139e6b01f15781f14e", size = 56813, upload-time = "2026-02-13T10:04:32.008Z" },
 ]

 [[package]]
@@ -2278,11 +2278,11 @@ wheels = [

 [[package]]
 name = "urllib3"
-version = "2.6.3"
+version = "2.7.0"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/c7/24/5f1b3bdffd70275f6661c76461e25f024d5a38a46f04aaca912426a2b1d3/urllib3-2.6.3.tar.gz", hash = "sha256:1b62b6884944a57dbe321509ab94fd4d3b307075e0c2eae991ac71ee15ad38ed", size = 435556, upload-time = "2026-01-07T16:24:43.925Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/53/0c/06f8b233b8fd13b9e5ee11424ef85419ba0d8ba0b3138bf360be2ff56953/urllib3-2.7.0.tar.gz", hash = "sha256:231e0ec3b63ceb14667c67be60f2f2c40a518cb38b03af60abc813da26505f4c", size = 433602, upload-time = "2026-05-07T16:13:18.596Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/39/08/aaaad47bc4e9dc8c725e68f9d04865dbcb2052843ff09c97b08904852d84/urllib3-2.6.3-py3-none-any.whl", hash = "sha256:bf272323e553dfb2e87d9bfd225ca7b0f467b919d7bbd355436d3fd37cb0acd4", size = 131584, upload-time = "2026-01-07T16:24:42.685Z" },
+    { url = "https://files.pythonhosted.org/packages/7f/3e/5db95bcf282c52709639744ca2a8b149baccf648e39c8cc87553df9eae0c/urllib3-2.7.0-py3-none-any.whl", hash = "sha256:9fb4c81ebbb1ce9531cce37674bbc6f1360472bc18ca9a553ede278ef7276897", size = 131087, upload-time = "2026-05-07T16:13:17.151Z" },
 ]

 [[package]]
@@ -14,6 +14,8 @@
 const fs = require('fs');
 const path = require('path');
 const { spawnSync } = require('child_process');
+const { acquireHookSlot } = require('./hook-lock.js');
+const { hasGitNexusDbLockedByGitNexusServer } = require('./hook-db-lock-probe.cjs');

 /**
 * Read JSON input from stdin synchronously.
@@ -75,6 +77,7 @@ function findCanonicalRepoRoot(cwd) {
      timeout: 2000,
      cwd,
      stdio: ['pipe', 'pipe', 'pipe'],
+      windowsHide: true,
    });
    if (result.error || result.status !== 0) return null;
    const commonDir = (result.stdout || '').trim();
@@ -102,6 +105,28 @@ function findGitNexusDir(startDir) {
  return null;
 }

+function hasGitNexusServerOwner(gitNexusDir) {
+  return hasGitNexusDbLockedByGitNexusServer(path.join(gitNexusDir, 'lbug'), process.pid);
+}
+
+function extractAugmentContext(stderr) {
+  const output = (stderr || '').trim();
+  const marker = output.indexOf('[GitNexus]');
+  const debug = process.env.GITNEXUS_DEBUG === '1' || process.env.GITNEXUS_DEBUG === 'true';
+  if (debug && output.length > 0) {
+    // Emit the FULL discarded prefix (everything before the marker, or all of
+    // it when no marker is present) so suppressed diagnostics — LadybugDB lock
+    // warnings, parser errors, etc. — remain recoverable on the hook's own
+    // stderr. The untruncated payload lets operators see exactly what was
+    // filtered out instead of a 180-char JSON-quoted preview.
+    const discarded = marker === -1 ? output : output.slice(0, marker).trim();
+    if (discarded.length > 0) {
+      process.stderr.write(`[GitNexus hook] augment stderr discarded prefix:\n${discarded}\n`);
+    }
+  }
+  return marker === -1 ? '' : output.slice(marker).trim();
+}
+
 /**
 * Extract search pattern from tool input.
 */
@@ -169,6 +194,16 @@ function extractPattern(toolName, toolInput) {
 */
 function runGitNexusCli(args, cwd, timeout) {
  const isWin = process.platform === 'win32';
+  const hookCli = process.env.GITNEXUS_HOOK_CLI_PATH;
+  if (hookCli !== undefined && String(hookCli).trim() && fs.existsSync(String(hookCli))) {
+    return spawnSync(process.execPath, [String(hookCli), ...args], {
+      encoding: 'utf-8',
+      timeout,
+      cwd,
+      stdio: ['pipe', 'pipe', 'pipe'],
+      windowsHide: true,
+    });
+  }

  // Detect whether 'gitnexus' is on PATH (cheap check, no execution)
  let useDirectBinary = false;
@@ -177,6 +212,7 @@ function runGitNexusCli(args, cwd, timeout) {
      encoding: 'utf-8',
      timeout: 3000,
      stdio: ['pipe', 'pipe', 'pipe'],
+      windowsHide: true,
    });
    useDirectBinary = which.status === 0;
  } catch {
@@ -189,6 +225,7 @@ function runGitNexusCli(args, cwd, timeout) {
      timeout,
      cwd,
      stdio: ['pipe', 'pipe', 'pipe'],
+      windowsHide: true,
    });
  }
  // npx fallback needs shell on Windows since npx is a .cmd script
@@ -197,6 +234,7 @@ function runGitNexusCli(args, cwd, timeout) {
    timeout: timeout + 5000,
    cwd,
    stdio: ['pipe', 'pipe', 'pipe'],
+    windowsHide: true,
  });
 }

@@ -217,7 +255,8 @@ function sendHookResponse(hookEventName, message) {
 function handlePreToolUse(input) {
  const cwd = input.cwd || process.cwd();
  if (!path.isAbsolute(cwd)) return;
-  if (!findGitNexusDir(cwd)) return;
+  const gitNexusDir = findGitNexusDir(cwd);
+  if (!gitNexusDir) return;

  const toolName = input.tool_name || '';
  const toolInput = input.tool_input || {};
@@ -226,19 +265,28 @@ function handlePreToolUse(input) {

  const pattern = extractPattern(toolName, toolInput);
  if (!pattern || pattern.length < 3) return;
+  if (hasGitNexusServerOwner(gitNexusDir)) {
+    process.stderr.write('[GitNexus] augment skipped: MCP server owns DB\n');
+    return;
+  }
+
+  const release = acquireHookSlot(gitNexusDir);
+  if (!release) return;

  let result = '';
  try {
    const child = runGitNexusCli(['augment', '--', pattern], cwd, 7000);
    if (!child.error && child.status === 0) {
-      result = child.stderr || '';
+      result = extractAugmentContext(child.stderr || '');
    }
  } catch {
    /* graceful failure */
+  } finally {
+    release();
  }

-  if (result && result.trim()) {
-    sendHookResponse('PreToolUse', result.trim());
+  if (result) {
+    sendHookResponse('PreToolUse', result);
  }
 }

@@ -275,6 +323,7 @@ function handlePostToolUse(input) {
      timeout: 3000,
      cwd,
      stdio: ['pipe', 'pipe', 'pipe'],
+      windowsHide: true,
    });
    currentHead = (headResult.stdout || '').trim();
  } catch {
@@ -0,0 +1,241 @@
+/**
+ * Cross-platform best-effort probe: does another process hold dbPath open
+ * with a command line that looks like a GitNexus MCP/serve server?
+ *
+ * Backends (no user-installed Sysinternals):
+ * - Linux: scan procfs under /proc (per-PID fd entries) via stat(2) (dev+inode); works without lsof;
+ *   optional lsof fallback when proc scan finds nothing.
+ * - macOS / *BSD / etc.: trusted lsof + ps (absolute paths first).
+ * - Windows: Restart Manager (rstrtmgr) via bundled PowerShell script +
+ *   Win32_Process for command lines; trusted powershell.exe under %SystemRoot%.
+ *
+ * Fail-open on most errors; fail-closed only on lsof ETIMEDOUT (Unix) or
+ * PowerShell ETIMEDOUT (Windows), matching the hook contract.
+ */
+
+const fs = require('fs');
+const path = require('path');
+const { spawnSync } = require('child_process');
+
+function isGitNexusServerCommand(command) {
+  const hasServerMode = /(?:^|\s)(mcp|serve)(?:\s|$)/.test(command);
+  const hasGitNexus =
+    /(?:^|[/\\\s])gitnexus(?:\.cmd)?(?:\s|$)/.test(command) ||
+    /node_modules[/\\]gitnexus[/\\]/.test(command);
+  return hasServerMode && hasGitNexus;
+}
+
+function resolveHookBinary(tool) {
+  const envKey = tool === 'lsof' ? 'GITNEXUS_HOOK_LSOF_PATH' : 'GITNEXUS_HOOK_PS_PATH';
+  const fromEnv = process.env[envKey];
+  if (fromEnv && String(fromEnv).trim() && fs.existsSync(String(fromEnv))) {
+    return String(fromEnv);
+  }
+  const candidates =
+    tool === 'lsof'
+      ? ['/usr/bin/lsof', '/usr/sbin/lsof', '/sbin/lsof', tool]
+      : ['/bin/ps', '/usr/bin/ps', tool];
+  for (const candidate of candidates) {
+    if (candidate === tool) return tool;
+    try {
+      if (fs.existsSync(candidate)) return candidate;
+    } catch {
+      /* ignore */
+    }
+  }
+  return tool;
+}
+
+function resolveWindowsPowerShellPath() {
+  const fromEnv = process.env.GITNEXUS_HOOK_POWERSHELL_PATH;
+  if (fromEnv && String(fromEnv).trim() && fs.existsSync(String(fromEnv).trim())) {
+    return String(fromEnv).trim();
+  }
+  const root = process.env.SystemRoot || 'C:\\Windows';
+  const ps = path.join(root, 'System32', 'WindowsPowerShell', 'v1.0', 'powershell.exe');
+  if (fs.existsSync(ps)) return ps;
+  const psWow = path.join(root, 'SysWOW64', 'WindowsPowerShell', 'v1.0', 'powershell.exe');
+  if (fs.existsSync(psWow)) return psWow;
+  return 'powershell.exe';
+}
+
+// Sentinel:
+//   undefined = not loaded yet (try the read)
+//   string    = encoded PowerShell command (successful load)
+//   null      = load attempted and failed (do not retry; warning already emitted)
+let windowsRmListPsEncodedCommandCache;
+let windowsRmListPsLoadFailureWarned = false;
+function getWindowsRmListEncodedCommand() {
+  if (windowsRmListPsEncodedCommandCache !== undefined) {
+    return windowsRmListPsEncodedCommandCache;
+  }
+  try {
+    const ps1Path = path.join(__dirname, 'win-rm-list-json.ps1');
+    const src = fs
+      .readFileSync(ps1Path, 'utf8')
+      .replace(/^\uFEFF/, '')
+      .replace(/\r\n/g, '\n');
+    windowsRmListPsEncodedCommandCache = Buffer.from(src, 'utf16le').toString('base64');
+  } catch (err) {
+    windowsRmListPsEncodedCommandCache = null;
+    if (
+      !windowsRmListPsLoadFailureWarned &&
+      (process.env.GITNEXUS_DEBUG === '1' || process.env.GITNEXUS_DEBUG === 'true')
+    ) {
+      windowsRmListPsLoadFailureWarned = true;
+      const msg = err && err.message ? String(err.message).slice(0, 200) : 'unknown';
+      process.stderr.write(`[GitNexus hook] win-rm-list-json.ps1 load failed: ${msg}\n`);
+    }
+  }
+  return windowsRmListPsEncodedCommandCache;
+}
+
+function hasGitNexusServerOwnerWindows(dbPathAbs, myPid) {
+  const encoded = getWindowsRmListEncodedCommand();
+  if (!encoded) return false;
+  const psExe = resolveWindowsPowerShellPath();
+  const r = spawnSync(
+    psExe,
+    [
+      '-NoProfile',
+      '-NonInteractive',
+      '-ExecutionPolicy',
+      'Bypass',
+      '-STA',
+      '-EncodedCommand',
+      encoded,
+    ],
+    {
+      encoding: 'utf-8',
+      timeout: 6000,
+      stdio: ['ignore', 'pipe', 'ignore'],
+      windowsHide: true,
+      env: { ...process.env, GITNEXUS_HOOK_RM_TARGET: dbPathAbs },
+    },
+  );
+  // ETIMEDOUT means the PowerShell probe didn't return in time; treat as 'unresponsive process holds DB' → fail-closed (skip augment).
+  if (r.error) return r.error.code === 'ETIMEDOUT';
+  if (r.status !== 0) return false;
+  let rows;
+  try {
+    rows = JSON.parse(String(r.stdout || '').trim() || '[]');
+  } catch {
+    return false;
+  }
+  if (!Array.isArray(rows)) return false;
+  for (const row of rows) {
+    const procId = Number(row.pid);
+    const cmd = String(row.cmd || '');
+    if (!Number.isFinite(procId) || procId === myPid) continue;
+    if (isGitNexusServerCommand(cmd)) return true;
+  }
+  return false;
+}
+
+function readLinuxCmdline(pidStr) {
+  try {
+    return fs.readFileSync(`/proc/${pidStr}/cmdline`, 'utf8').replace(/\0+/g, ' ').trim();
+  } catch {
+    return '';
+  }
+}
+
+function linuxProcScanFindGitNexusServer(dbPathAbs, myPid) {
+  const raw = process.env.GITNEXUS_HOOK_LINUX_PROC_BUDGET_MS;
+  const budget = Number(raw && String(raw).trim()) ? Number.parseInt(String(raw), 10) : 1200;
+  const start = Date.now();
+  let targetStat;
+  try {
+    targetStat = fs.statSync(dbPathAbs);
+  } catch {
+    return false;
+  }
+  let procEntries;
+  try {
+    procEntries = fs.readdirSync('/proc', { withFileTypes: true });
+  } catch {
+    return false;
+  }
+  for (const ent of procEntries) {
+    if (Date.now() - start > budget) return false;
+    if (!ent.isDirectory() || !/^\d+$/.test(ent.name)) continue;
+    const pid = Number.parseInt(ent.name, 10);
+    if (!Number.isFinite(pid) || pid === myPid) continue;
+    const fdDir = path.join('/proc', ent.name, 'fd');
+    let fds;
+    try {
+      fds = fs.readdirSync(fdDir);
+    } catch {
+      continue;
+    }
+    let holds = false;
+    for (const fd of fds) {
+      if (Date.now() - start > budget) return false;
+      try {
+        const st = fs.statSync(path.join(fdDir, fd));
+        if (st.dev === targetStat.dev && st.ino === targetStat.ino) {
+          holds = true;
+          break;
+        }
+      } catch {
+        /* ignore */
+      }
+    }
+    if (!holds) continue;
+    if (isGitNexusServerCommand(readLinuxCmdline(ent.name))) return true;
+  }
+  return false;
+}
+
+function unixLsofPsFindGitNexusServer(dbPathAbs, myPid) {
+  const lsofPath = resolveHookBinary('lsof');
+  const lsof = spawnSync(lsofPath, ['-nP', '-t', '--', dbPathAbs], {
+    encoding: 'utf-8',
+    timeout: 1000,
+    stdio: ['ignore', 'pipe', 'ignore'],
+    windowsHide: true,
+  });
+  if (lsof.error) return lsof.error.code === 'ETIMEDOUT';
+
+  const pids = (lsof.stdout || '').split(/\s+/).filter(Boolean);
+  const psPath = resolveHookBinary('ps');
+  for (const pid of pids) {
+    if (Number(pid) === myPid) continue;
+    const ps = spawnSync(psPath, ['-p', pid, '-o', 'command='], {
+      encoding: 'utf-8',
+      timeout: 500,
+      stdio: ['ignore', 'pipe', 'ignore'],
+      windowsHide: true,
+    });
+    if (ps.error) {
+      if (ps.error.code === 'ETIMEDOUT') return true;
+      continue;
+    }
+    if (isGitNexusServerCommand(ps.stdout || '')) return true;
+  }
+  return false;
+}
+
+/**
+ * @param {string} dbPath Absolute or relative path to the DB file (e.g. .../lbug).
+ * @param {number} myPid Current process PID (hook runner), excluded from matches.
+ */
+function hasGitNexusDbLockedByGitNexusServer(dbPath, myPid) {
+  if (!fs.existsSync(dbPath)) return false;
+  const dbPathAbs = path.resolve(dbPath);
+
+  if (process.platform === 'win32') {
+    return hasGitNexusServerOwnerWindows(dbPathAbs, myPid);
+  }
+
+  if (process.platform === 'linux') {
+    if (linuxProcScanFindGitNexusServer(dbPathAbs, myPid)) return true;
+    return unixLsofPsFindGitNexusServer(dbPathAbs, myPid);
+  }
+
+  return unixLsofPsFindGitNexusServer(dbPathAbs, myPid);
+}
+
+module.exports = {
+  hasGitNexusDbLockedByGitNexusServer,
+};
@@ -0,0 +1,119 @@
+const fs = require('fs');
+const path = require('path');
+
+const HOOK_LOCK_SUBDIR = '.hook-locks';
+const HOOK_LOCK_MAX_INFLIGHT = 3;
+const HOOK_LOCK_STALE_MS = 30000;
+
+function acquireHookSlot(gitNexusDir) {
+  const lockDir = path.join(gitNexusDir, HOOK_LOCK_SUBDIR);
+  try {
+    fs.mkdirSync(lockDir, { recursive: true });
+  } catch {
+    // Cannot create lock dir (read-only fs, cross-user perm denial, out of
+    // inodes, etc.) — fail closed by returning null. Caller skips augment.
+    // Fail-open here would let N concurrent hooks all proceed unguarded and
+    // reintroduce the #1486 fan-out the guard exists to prevent.
+    return null;
+  }
+
+  const myPidStr = String(process.pid);
+
+  for (let slot = 0; slot < HOOK_LOCK_MAX_INFLIGHT; slot++) {
+    const slotPath = path.join(lockDir, `slot-${slot}.lock`);
+    for (let attempt = 0; attempt < 2; attempt++) {
+      try {
+        fs.writeFileSync(slotPath, myPidStr, { flag: 'wx' });
+        let released = false;
+        const release = () => {
+          if (released) return;
+          released = true;
+          try {
+            // Only unlink if we still own the slot. If we appeared stale and
+            // another hook took over, the file now belongs to it — leave alone.
+            const content = fs.readFileSync(slotPath, 'utf-8').trim();
+            if (content === myPidStr) fs.unlinkSync(slotPath);
+          } catch {
+            /* already removed or unreadable */
+          }
+        };
+        process.on('exit', release);
+        return release;
+      } catch {
+        // Slot exists. Decide whether to take it over.
+        // Open once and inspect mtime + content via the same fd so there's
+        // no TOCTOU between the metadata check and the content read
+        // (codeql js/file-system-race).
+        let fd;
+        try {
+          fd = fs.openSync(slotPath, 'r');
+        } catch {
+          continue; // Vanished between EEXIST and open — retry this slot.
+        }
+        let isLive = false;
+        let mtimeMs = Date.now();
+        try {
+          mtimeMs = fs.fstatSync(fd).mtimeMs;
+          const buf = Buffer.alloc(32);
+          const n = fs.readSync(fd, buf, 0, 32, 0);
+          const ownerStr = buf.slice(0, n).toString('utf-8').trim();
+          if (ownerStr === '') {
+            // Owner created the file but hasn't written its PID yet. The
+            // wx open+write window is microseconds; give it the benefit
+            // of the doubt and treat as live.
+            isLive = true;
+          } else {
+            const owner = Number.parseInt(ownerStr, 10);
+            if (Number.isFinite(owner) && owner > 0) {
+              try {
+                process.kill(owner, 0);
+                isLive = true;
+              } catch (e) {
+                // ESRCH = process gone → treat as dead. EPERM = process exists
+                // but owned by another user (cross-user lock dir) → still alive,
+                // keep the slot. Anything else: be conservative, assume alive.
+                if (e && e.code === 'ESRCH') {
+                  isLive = false;
+                } else {
+                  isLive = true;
+                }
+              }
+            }
+          }
+        } catch {
+          /* unreadable — treat as dead */
+        } finally {
+          try {
+            fs.closeSync(fd);
+          } catch {
+            /* already closed */
+          }
+        }
+        // For slots younger than HOOK_LOCK_STALE_MS, PID-liveness wins —
+        // a slow-but-alive hook is never wrongly evicted. For older slots,
+        // age is the final arbiter as a defense against PID reuse on long-
+        // abandoned slots. 30s >> the 7s augment timeout, so a healthy run
+        // never crosses this threshold.
+        if (isLive && Date.now() - mtimeMs > HOOK_LOCK_STALE_MS) {
+          isLive = false;
+        }
+        if (isLive) break; // Try the next slot.
+        try {
+          fs.unlinkSync(slotPath);
+        } catch {
+          /* another hook beat us to it — retry will hit EEXIST */
+        }
+        // Loop and retry this slot.
+      }
+    }
+  }
+
+  return null;
+}
+
+module.exports = {
+  HOOK_LOCK_SUBDIR,
+  HOOK_LOCK_MAX_INFLIGHT,
+  HOOK_LOCK_STALE_MS,
+  acquireHookSlot,
+};
@@ -0,0 +1,76 @@
+$ErrorActionPreference = 'Stop'
+$target = $env:GITNEXUS_HOOK_RM_TARGET
+if ([string]::IsNullOrWhiteSpace($target)) { Write-Output '[]'; exit 0 }
+$target = (Resolve-Path -LiteralPath $target).ProviderPath
+
+if (-not ([Management.Automation.PSTypeName]'GitNexusHookRm.Native').Type) {
+Add-Type @'
+using System;
+using System.Runtime.InteropServices;
+namespace GitNexusHookRm {
+  public static class Native {
+    public const int ErrorMoreData = 234;
+    [StructLayout(LayoutKind.Sequential, Pack = 4)]
+    public struct RM_UNIQUE_PROCESS {
+      public int dwProcessId;
+      public long ProcessStartTime;
+    }
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
+    public struct RM_PROCESS_INFO {
+      public RM_UNIQUE_PROCESS Process;
+      [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
+      public string strAppName;
+      [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)]
+      public string strServiceShortName;
+      public uint ApplicationType;
+      public uint AppStatus;
+      public uint TSSessionId;
+      public uint bRestartable;
+    }
+    [DllImport("rstrtmgr.dll", CharSet = CharSet.Unicode)]
+    public static extern int RmStartSession(out uint pSessionHandle, uint dwSessionFlags, string strSessionKey);
+    [DllImport("rstrtmgr.dll", CharSet = CharSet.Unicode)]
+    public static extern int RmRegisterResources(uint pSessionHandle, uint nFiles, string[] rgsFileNames, uint nApplications, IntPtr rgApplications, uint nServices, string[] rgsServiceNames);
+    [DllImport("rstrtmgr.dll")]
+    public static extern int RmGetList(uint dwSessionHandle, out uint pnProcInfoNeeded, ref uint pnProcInfo, [In, Out] RM_PROCESS_INFO[] rgAffectedApps, ref uint lpdwRebootReasons);
+    [DllImport("rstrtmgr.dll")]
+    public static extern int RmEndSession(uint pSessionHandle);
+  }
+}
+'@
+}
+
+$h = [uint32]0
+$key = [guid]::NewGuid().ToString('N')
+$rmErr = [GitNexusHookRm.Native]::RmStartSession([ref]$h, 0, $key)
+if ($rmErr -ne 0) { Write-Output '[]'; exit 0 }
+$files = @($target)
+$err = [GitNexusHookRm.Native]::RmRegisterResources($h, 1, $files, 0, [IntPtr]::Zero, 0, $null)
+if ($err -ne 0) {
+  [void][GitNexusHookRm.Native]::RmEndSession($h)
+  Write-Output '[]'
+  exit 0
+}
+$need = [uint32]0
+$n = [uint32]0
+$reboot = [uint32]0
+$err = [GitNexusHookRm.Native]::RmGetList($h, [ref]$need, [ref]$n, $null, [ref]$reboot)
+if ($err -ne [GitNexusHookRm.Native]::ErrorMoreData) {
+  [void][GitNexusHookRm.Native]::RmEndSession($h)
+  Write-Output '[]'
+  exit 0
+}
+$n = $need
+$buf = New-Object GitNexusHookRm.Native+RM_PROCESS_INFO[] ([int]$n)
+$err = [GitNexusHookRm.Native]::RmGetList($h, [ref]$need, [ref]$n, $buf, [ref]$reboot)
+[void][GitNexusHookRm.Native]::RmEndSession($h)
+if ($err -ne 0) { Write-Output '[]'; exit 0 }
+
+$out = @()
+for ($i = 0; $i -lt [int]$n; $i++) {
+  $procId = $buf[$i].Process.dwProcessId
+  $p = Get-CimInstance -ClassName Win32_Process -Filter "ProcessId=$procId" -ErrorAction SilentlyContinue
+  $cmd = if ($p) { $p.CommandLine } else { '' }
+  $out += [PSCustomObject]@{ pid = [int]$procId; cmd = $cmd }
+}
+ConvertTo-Json -InputObject @($out) -Compress
@@ -56,13 +56,15 @@ Generates repository documentation from the knowledge graph using an LLM. Requir

 | Flag | Effect |
 |------|--------|
-| `--force` | Force full regeneration |
+| `--force` | Force full regeneration, also required to re-gerenate an existing wiki in a different language |
 | `--model <model>` | LLM model (default: minimax/minimax-m2.5) |
 | `--base-url <url>` | LLM API base URL |
 | `--api-key <key>` | LLM API key |
 | `--concurrency <n>` | Parallel LLM calls (default: 3) |
 | `--gist` | Publish wiki as a public GitHub Gist |
-
+| `--timeout <seconds>` | LLM request timeout in seconds (default: disabled) |
+| `--retries <n>` | Max LLM retry attempts per request (default: 3) |
+| `--lang <lang>`  | Output language for generated documentation (e.g. english, chinese, spanish, japanese)|
 ### list — Show all indexed repos

 ```bash
@@ -0,0 +1,91 @@
+# GitNexus — Cursor integration
+
+Static config that adds GitNexus knowledge-graph augmentation and skill files to Cursor.
+
+> **Hooks require Cursor 2.4+.** Earlier versions don't expose `postToolUse` and the hook will silently no-op.
+
+## What you get
+
+| Layer                     | What it does                                                                                                                              | How it's installed                                                              |
+| ------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------- |
+| **MCP**                   | `gitnexus` MCP server with 16 tools (`query`, `context`, `impact`, `detect_changes`, `rename`, …)                                         | `npx gitnexus setup` writes `~/.cursor/mcp.json` automatically.                 |
+| **Skills**                | `/gitnexus-exploring`, `/gitnexus-debugging`, `/gitnexus-impact-analysis`, `/gitnexus-refactoring`, `/gitnexus-pr-review` markdown skills | `npx gitnexus setup` copies them to `~/.cursor/skills/gitnexus/`.               |
+| **Hooks** _(this README)_ | `postToolUse` hook that enriches `Shell` / `Read` / `Grep` tool calls with graph context — same augmentation Claude Code gets             | **Manual** — copy the files described below into your project's `.cursor/`. |
+
+## Hook install
+
+Cursor 2.4+ reads `.cursor/hooks.json` from the project root and runs hook commands with the project root as the working directory ([docs](https://cursor.com/docs/agent/hooks)).
+
+From this repo's `gitnexus-cursor-integration/hooks/`, copy the files below into your **project root**:
+
+```text
+<your-project>/
+├── .cursor/
+│   └── hooks.json              ← from gitnexus-cursor-integration/hooks/hooks.json
+└── hooks/
+    ├── gitnexus-hook.cjs       ← from gitnexus-cursor-integration/hooks/gitnexus-hook.cjs
+    └── hook-lock.cjs           ← from gitnexus-cursor-integration/hooks/hook-lock.cjs
+```
+
+Equivalent shell commands (run from your project root, with `$GITNEXUS_REPO` pointing at a clone of this repo):
+
+```bash
+mkdir -p .cursor hooks
+cp "$GITNEXUS_REPO/gitnexus-cursor-integration/hooks/hooks.json"        .cursor/hooks.json
+cp "$GITNEXUS_REPO/gitnexus-cursor-integration/hooks/gitnexus-hook.cjs" hooks/gitnexus-hook.cjs
+cp "$GITNEXUS_REPO/gitnexus-cursor-integration/hooks/hook-lock.cjs"     hooks/hook-lock.cjs
+```
+
+If you already have a `.cursor/hooks.json`, merge the `hooks.postToolUse` array rather than overwriting.
+
+### Verify
+
+1. Index the project: `npx gitnexus analyze`
+2. Reload the Cursor window so it picks up the new hook config.
+3. Ask the agent something that triggers `Read` / `Grep` / `Shell rg`. You should see a `[GitNexus]` block appended to the tool result.
+4. Diagnose silent no-ops by setting `GITNEXUS_DEBUG=1` in your shell environment — the hook will write Cursor's raw event payload to stderr so you can verify field names.
+
+### What's installed manually vs. automated
+
+| Step                                                                 | Automated by `gitnexus setup`? |
+| -------------------------------------------------------------------- | ------------------------------ |
+| `~/.cursor/mcp.json`                                                 | ✅                             |
+| `~/.cursor/skills/gitnexus/*`                                        | ✅                             |
+| `<project>/.cursor/hooks.json` + `<project>/hooks/gitnexus-hook.cjs` + `<project>/hooks/hook-lock.cjs` | ❌ — copy manually (see above) |
+
+Hook install is per-project (Cursor scopes hooks to a project root); skills and MCP config are global.
+
+## Hook contract
+
+The hook receives a JSON event on stdin matching Cursor 2.4's `postToolUse` shape:
+
+```json
+{
+  "tool_name": "Grep" | "Read" | "Shell",
+  "tool_input": { /* tool-specific */ },
+  "tool_output": { /* optional */ },
+  "cwd": "/absolute/path/to/project"
+}
+```
+
+It writes augmentation context to stdout as:
+
+```json
+{ "additional_context": "[GitNexus] …" }
+```
+
+Empty stdout means "no augmentation, continue normally" — the hook never blocks the tool.
+
+### Pattern extraction per tool
+
+| Tool    | Pattern source                                                                                                         | Notes                                                                                                |
+| ------- | ---------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------- |
+| `Grep`  | `tool_input.query` (also `pattern`, `regex`, `q`, `search`, `searchQuery`)                                             | Last-resort fallback: longest string value in `tool_input` (≥ 3 chars).                              |
+| `Read`  | basename of `tool_input.target_file` (also `file_path`, `filePath`, `path`, `file`), stripped to identifier characters | `auth/handler.ts` → `handler`.                                                                       |
+| `Shell` | First positional argument after `rg` / `grep` in `tool_input.command`                                                  | Best-effort tokenizer; quoted multi-word patterns (`rg "User Service"`) extract the first word only. |
+
+## Troubleshooting
+
+- **Nothing happens** — Confirm Cursor is on 2.4+ and the project root has `.cursor/hooks.json` plus both hook files at `hooks/gitnexus-hook.cjs` and `hooks/hook-lock.cjs`. Then `npx gitnexus list` to confirm the project is indexed.
+- **`gitnexus` not found** — The hook prefers a locally-resolvable `gitnexus/dist/cli/index.js` and falls back to `npx -y gitnexus`. Install globally with `npm i -g gitnexus` to skip the npx cold-start latency.
+- **Wrong pattern extracted** — Set `GITNEXUS_DEBUG=1` and run a tool call. The raw stdin payload is logged to stderr; use it to confirm Cursor's actual `tool_input` field names against the table above. If they differ, file an issue with the captured payload.
@@ -1,50 +0,0 @@
-#!/bin/bash
-# GitNexus beforeShellExecution hook for Cursor
-# Receives JSON on stdin with { command, cwd, timeout }
-# Returns JSON on stdout with { permission, agent_message }
-#
-# Extracts search pattern from grep/rg commands, runs gitnexus augment,
-# and injects the enriched context via agent_message.
-
-INPUT=$(cat)
-
-COMMAND=$(echo "$INPUT" | jq -r '.command // empty' 2>/dev/null)
-
-if [ -z "$COMMAND" ]; then
-  echo '{"permission":"allow"}'
-  exit 0
-fi
-
-# Skip non-search commands
-case "$COMMAND" in
-  cd\ *|npm\ *|yarn\ *|pnpm\ *|git\ commit*|git\ push*|git\ pull*|mkdir\ *|rm\ *|cp\ *|mv\ *|echo\ *|cat\ *)
-    echo '{"permission":"allow"}'
-    exit 0
-    ;;
-esac
-
-# Extract search pattern from rg/grep commands
-PATTERN=""
-if echo "$COMMAND" | grep -qE '\brg\b'; then
-  PATTERN=$(echo "$COMMAND" | sed -n "s/.*\brg\s\+\(--[^ ]*\s\+\)*['\"]\\?\([^'\";\| >]*\\).*/\2/p")
-elif echo "$COMMAND" | grep -qE '\bgrep\b'; then
-  PATTERN=$(echo "$COMMAND" | sed -n "s/.*\bgrep\s\+\(-[^ ]*\s\+\)*['\"]\\?\([^'\";\| >]*\\).*/\2/p")
-fi
-
-if [ -z "$PATTERN" ] || [ ${#PATTERN} -lt 3 ]; then
-  echo '{"permission":"allow"}'
-  exit 0
-fi
-
-# Run gitnexus augment
-RESULT=$(npx -y gitnexus augment "$PATTERN" 2>/dev/null)
-
-if [ -n "$RESULT" ]; then
-  # Escape for JSON
-  ESCAPED=$(echo "$RESULT" | jq -Rs .)
-  echo "{\"permission\":\"allow\",\"agent_message\":$ESCAPED}"
-else
-  echo '{"permission":"allow"}'
-fi
-
-exit 0
@@ -0,0 +1,269 @@
+#!/usr/bin/env node
+/**
+ * GitNexus Cursor postToolUse Hook
+ *
+ * Receives a JSON event on stdin describing a finished tool call, derives a
+ * search pattern (Grep query, Read file basename, or rg/grep arg from a Shell
+ * command), runs `gitnexus augment <pattern>`, and emits the enriched context
+ * back as `{ additional_context: "..." }` so the agent sees it alongside the
+ * tool result.
+ *
+ * Replaces the legacy beforeShellExecution / augment-shell.sh pipeline:
+ *   - Cross-platform (no bash, no jq — runs on Windows out of the box)
+ *   - Covers Read and Grep, not just Shell rg/grep
+ *
+ * Cursor 2.4+ generic hooks: https://cursor.com/docs/agent/hooks
+ */
+
+const fs = require('fs');
+const path = require('path');
+const { spawnSync } = require('child_process');
+const { acquireHookSlot } = require('./hook-lock.cjs');
+
+function readInput() {
+  try {
+    const data = fs.readFileSync(0, 'utf-8');
+    return JSON.parse(data);
+  } catch {
+    return {};
+  }
+}
+
+function isGlobalRegistryDir(candidate) {
+  if (fs.existsSync(path.join(candidate, 'meta.json'))) return false;
+  return (
+    fs.existsSync(path.join(candidate, 'registry.json')) ||
+    fs.existsSync(path.join(candidate, 'repos'))
+  );
+}
+
+function walkForGitNexusDir(startDir) {
+  let dir = startDir;
+  for (let i = 0; i < 5; i++) {
+    const candidate = path.join(dir, '.gitnexus');
+    if (fs.existsSync(candidate)) {
+      if (!isGlobalRegistryDir(candidate)) return candidate;
+    }
+    const parent = path.dirname(dir);
+    if (parent === dir) break;
+    dir = parent;
+  }
+  return null;
+}
+
+function findCanonicalRepoRoot(cwd) {
+  try {
+    const result = spawnSync('git', ['rev-parse', '--path-format=absolute', '--git-common-dir'], {
+      encoding: 'utf-8',
+      timeout: 2000,
+      cwd,
+      stdio: ['pipe', 'pipe', 'pipe'],
+      windowsHide: true,
+    });
+    if (result.error || result.status !== 0) return null;
+    const commonDir = (result.stdout || '').trim();
+    if (!commonDir || !path.isAbsolute(commonDir)) return null;
+    return path.dirname(commonDir);
+  } catch {
+    return null;
+  }
+}
+
+function findGitNexusDir(startDir) {
+  const cwd = startDir || process.cwd();
+  const fromCwd = walkForGitNexusDir(cwd);
+  if (fromCwd) return fromCwd;
+  const canonicalRoot = findCanonicalRepoRoot(cwd);
+  if (canonicalRoot && canonicalRoot !== cwd) {
+    return walkForGitNexusDir(canonicalRoot);
+  }
+  return null;
+}
+
+function parseRgGrepPattern(cmd) {
+  const tokens = cmd.split(/\s+/);
+  let foundCmd = false;
+  let skipNext = false;
+  const flagsWithValues = new Set([
+    '-e',
+    '-f',
+    '-m',
+    '-A',
+    '-B',
+    '-C',
+    '-g',
+    '--glob',
+    '-t',
+    '--type',
+    '--include',
+    '--exclude',
+  ]);
+
+  for (const token of tokens) {
+    if (skipNext) {
+      skipNext = false;
+      continue;
+    }
+    if (!foundCmd) {
+      if (/\brg$|\bgrep$/.test(token)) foundCmd = true;
+      continue;
+    }
+    if (token.startsWith('-')) {
+      if (flagsWithValues.has(token)) skipNext = true;
+      continue;
+    }
+    const cleaned = token.replace(/['"]/g, '');
+    return cleaned.length >= 3 ? cleaned : null;
+  }
+  return null;
+}
+
+/**
+ * Extract a search pattern from the tool input. Cursor 2.4 docs at
+ * https://cursor.com/docs/agent/hooks list the tool *matchers* but do not
+ * formally specify the per-tool tool_input field names, so we probe a
+ * generous set of MCP-style aliases. As a last-resort fallback for Grep
+ * (the highest-frequency search path) we also accept the longest plausible
+ * string value in tool_input. Set GITNEXUS_DEBUG=1 to log the raw payload
+ * to stderr if Cursor changes the contract and aliases stop matching.
+ */
+function pickLongestStringValue(obj) {
+  let best = null;
+  if (!obj || typeof obj !== 'object') return null;
+  for (const v of Object.values(obj)) {
+    if (typeof v === 'string' && v.length >= 3 && (!best || v.length > best.length)) {
+      best = v;
+    }
+  }
+  return best;
+}
+
+function extractPattern(toolName, toolInput) {
+  const t = (toolName || '').toLowerCase();
+
+  if (t === 'grep') {
+    const aliases = [
+      toolInput.query,
+      toolInput.pattern,
+      toolInput.regex,
+      toolInput.q,
+      toolInput.search,
+      toolInput.searchQuery,
+    ];
+    for (const a of aliases) {
+      if (typeof a === 'string' && a.length >= 3) return a;
+    }
+    // Last resort: scan tool_input for any reasonable-looking string value.
+    return pickLongestStringValue(toolInput);
+  }
+
+  if (t === 'read') {
+    const filePath =
+      toolInput.target_file ||
+      toolInput.file_path ||
+      toolInput.filePath ||
+      toolInput.path ||
+      toolInput.file ||
+      '';
+    if (!filePath) return null;
+    const base = path.basename(String(filePath), path.extname(String(filePath)));
+    const cleaned = base.replace(/[^a-zA-Z0-9_]/g, '');
+    return cleaned.length >= 3 ? cleaned : null;
+  }
+
+  if (t === 'shell') {
+    const cmd = toolInput.command || '';
+    if (!/\brg\b|\bgrep\b/.test(cmd)) return null;
+    // NOTE: parseRgGrepPattern uses split(/\s+/) and cannot handle shell
+    // quoting. `rg "User Service" src/` returns "User" (the first token
+    // after the rg/grep arg, with surrounding quotes stripped) — the
+    // multi-word pattern is intentionally not reconstructed since BM25 is
+    // already token-tolerant. Quoted single tokens (`rg "validateUser"`)
+    // work fine.
+    return parseRgGrepPattern(cmd);
+  }
+
+  return null;
+}
+
+function resolveCliPath() {
+  try {
+    return require.resolve('gitnexus/dist/cli/index.js');
+  } catch {
+    return '';
+  }
+}
+
+function runGitNexusCli(cliPath, args, cwd, timeout) {
+  const isWin = process.platform === 'win32';
+  if (cliPath) {
+    return spawnSync(process.execPath, [cliPath, ...args], {
+      encoding: 'utf-8',
+      timeout,
+      cwd,
+      stdio: ['pipe', 'pipe', 'pipe'],
+      windowsHide: true,
+    });
+  }
+  return spawnSync(isWin ? 'npx.cmd' : 'npx', ['-y', 'gitnexus', ...args], {
+    encoding: 'utf-8',
+    timeout: timeout + 5000,
+    cwd,
+    stdio: ['pipe', 'pipe', 'pipe'],
+    windowsHide: true,
+  });
+}
+
+function main() {
+  try {
+    const input = readInput();
+    if (process.env.GITNEXUS_DEBUG) {
+      // Echo the payload so users can capture Cursor's actual contract when
+      // diagnosing why augmentation isn't firing. Stderr only — stdout is
+      // reserved for the JSON response Cursor consumes.
+      try {
+        process.stderr.write(
+          `GitNexus Cursor hook stdin: ${JSON.stringify(input).slice(0, 500)}\n`,
+        );
+      } catch {
+        /* never let debug logging break the hook */
+      }
+    }
+    const cwd = input.cwd || process.cwd();
+    if (!path.isAbsolute(cwd)) return;
+    const gitNexusDir = findGitNexusDir(cwd);
+    if (!gitNexusDir) return;
+
+    const toolName = input.tool_name || '';
+    const toolInput = input.tool_input || {};
+
+    const pattern = extractPattern(toolName, toolInput);
+    if (!pattern || pattern.length < 3) return;
+
+    const release = acquireHookSlot(gitNexusDir);
+    if (!release) return;
+
+    const cliPath = resolveCliPath();
+    let result = '';
+    try {
+      const child = runGitNexusCli(cliPath, ['augment', '--', pattern], cwd, 7000);
+      if (!child.error && child.status === 0) {
+        result = child.stderr || '';
+      }
+    } catch {
+      /* graceful failure */
+    } finally {
+      release();
+    }
+
+    if (result && result.trim()) {
+      console.log(JSON.stringify({ additional_context: result.trim() }));
+    }
+  } catch (err) {
+    if (process.env.GITNEXUS_DEBUG) {
+      console.error('GitNexus Cursor hook error:', (err.message || '').slice(0, 200));
+    }
+  }
+}
+
+main();
@@ -0,0 +1,119 @@
+const fs = require('fs');
+const path = require('path');
+
+const HOOK_LOCK_SUBDIR = '.hook-locks';
+const HOOK_LOCK_MAX_INFLIGHT = 3;
+const HOOK_LOCK_STALE_MS = 30000;
+
+function acquireHookSlot(gitNexusDir) {
+  const lockDir = path.join(gitNexusDir, HOOK_LOCK_SUBDIR);
+  try {
+    fs.mkdirSync(lockDir, { recursive: true });
+  } catch {
+    // Cannot create lock dir (read-only fs, cross-user perm denial, out of
+    // inodes, etc.) — fail closed by returning null. Caller skips augment.
+    // Fail-open here would let N concurrent hooks all proceed unguarded and
+    // reintroduce the #1486 fan-out the guard exists to prevent.
+    return null;
+  }
+
+  const myPidStr = String(process.pid);
+
+  for (let slot = 0; slot < HOOK_LOCK_MAX_INFLIGHT; slot++) {
+    const slotPath = path.join(lockDir, `slot-${slot}.lock`);
+    for (let attempt = 0; attempt < 2; attempt++) {
+      try {
+        fs.writeFileSync(slotPath, myPidStr, { flag: 'wx' });
+        let released = false;
+        const release = () => {
+          if (released) return;
+          released = true;
+          try {
+            // Only unlink if we still own the slot. If we appeared stale and
+            // another hook took over, the file now belongs to it — leave alone.
+            const content = fs.readFileSync(slotPath, 'utf-8').trim();
+            if (content === myPidStr) fs.unlinkSync(slotPath);
+          } catch {
+            /* already removed or unreadable */
+          }
+        };
+        process.on('exit', release);
+        return release;
+      } catch {
+        // Slot exists. Decide whether to take it over.
+        // Open once and inspect mtime + content via the same fd so there's
+        // no TOCTOU between the metadata check and the content read
+        // (codeql js/file-system-race).
+        let fd;
+        try {
+          fd = fs.openSync(slotPath, 'r');
+        } catch {
+          continue; // Vanished between EEXIST and open — retry this slot.
+        }
+        let isLive = false;
+        let mtimeMs = Date.now();
+        try {
+          mtimeMs = fs.fstatSync(fd).mtimeMs;
+          const buf = Buffer.alloc(32);
+          const n = fs.readSync(fd, buf, 0, 32, 0);
+          const ownerStr = buf.slice(0, n).toString('utf-8').trim();
+          if (ownerStr === '') {
+            // Owner created the file but hasn't written its PID yet. The
+            // wx open+write window is microseconds; give it the benefit
+            // of the doubt and treat as live.
+            isLive = true;
+          } else {
+            const owner = Number.parseInt(ownerStr, 10);
+            if (Number.isFinite(owner) && owner > 0) {
+              try {
+                process.kill(owner, 0);
+                isLive = true;
+              } catch (e) {
+                // ESRCH = process gone → treat as dead. EPERM = process exists
+                // but owned by another user (cross-user lock dir) → still alive,
+                // keep the slot. Anything else: be conservative, assume alive.
+                if (e && e.code === 'ESRCH') {
+                  isLive = false;
+                } else {
+                  isLive = true;
+                }
+              }
+            }
+          }
+        } catch {
+          /* unreadable — treat as dead */
+        } finally {
+          try {
+            fs.closeSync(fd);
+          } catch {
+            /* already closed */
+          }
+        }
+        // For slots younger than HOOK_LOCK_STALE_MS, PID-liveness wins —
+        // a slow-but-alive hook is never wrongly evicted. For older slots,
+        // age is the final arbiter as a defense against PID reuse on long-
+        // abandoned slots. 30s >> the 7s augment timeout, so a healthy run
+        // never crosses this threshold.
+        if (isLive && Date.now() - mtimeMs > HOOK_LOCK_STALE_MS) {
+          isLive = false;
+        }
+        if (isLive) break; // Try the next slot.
+        try {
+          fs.unlinkSync(slotPath);
+        } catch {
+          /* another hook beat us to it — retry will hit EEXIST */
+        }
+        // Loop and retry this slot.
+      }
+    }
+  }
+
+  return null;
+}
+
+module.exports = {
+  HOOK_LOCK_SUBDIR,
+  HOOK_LOCK_MAX_INFLIGHT,
+  HOOK_LOCK_STALE_MS,
+  acquireHookSlot,
+};
@@ -1,11 +1,11 @@
 {
  "version": 1,
  "hooks": {
-    "beforeShellExecution": [
+    "postToolUse": [
      {
-        "command": "./hooks/augment-shell.sh",
-        "timeout": 5,
-        "matcher": "\\brg\\b|\\bgrep\\b"
+        "matcher": "Shell|Read|Grep",
+        "command": "node ./hooks/gitnexus-hook.cjs",
+        "timeout": 10
      }
    ]
  }
@@ -10,6 +10,10 @@
    ".": {
      "types": "./dist/index.d.ts",
      "default": "./dist/index.js"
+    },
+    "./test-helpers": {
+      "types": "./dist/test-helpers.d.ts",
+      "default": "./dist/test-helpers.js"
    }
  },
  "scripts": {
@@ -18,7 +18,11 @@ export type { NodeTableName, RelType } from './lbug/schema-constants.js';

 // Language support
 export { SupportedLanguages } from './languages.js';
-export { getLanguageFromFilename, getSyntaxLanguageFromFilename } from './language-detection.js';
+export {
+  getLanguageFromFilename,
+  getSyntaxLanguageFromFilename,
+  isBladeTemplateFilename,
+} from './language-detection.js';
 export type { MroStrategy } from './mro-strategy.js';

 // Pipeline progress
@@ -26,7 +30,7 @@ export type { PipelinePhase, PipelineProgress } from './pipeline.js';

 // ─── Scope-based resolution — RFC #909 (Ring 1 #910) ────────────────────────
 // Data model (RFC §2)
-export type { SymbolDefinition } from './scope-resolution/symbol-definition.js';
+export type { ParameterTypeClass, SymbolDefinition } from './scope-resolution/symbol-definition.js';
 export type {
  ScopeId,
  DefId,
@@ -127,8 +131,10 @@ export { CLASS_KINDS, METHOD_KINDS, FIELD_KINDS } from './scope-resolution/regis
 export type {
  RegistryContext,
  RegistryProviders,
+  OwnedMembersByOwnerLookup,
  OwnerScopedContributor,
  ArityVerdict,
+  ConstraintContext,
 } from './scope-resolution/registries/context.js';

 // Scope tree spine + position lookup (RFC §2.2 + §3.1; Ring 2 SHARED #912)
@@ -143,6 +149,34 @@ export type { ScopeTree } from './scope-resolution/scope-tree.js';
 export { buildPositionIndex } from './scope-resolution/position-index.js';
 export type { PositionIndex } from './scope-resolution/position-index.js';

+// Resilient fetch primitives — bounded retries + per-process circuit breaker.
+// Test-only helpers (`__resetBreakerRegistry__`, `classifyOutcome`) are
+// reachable via the separate `gitnexus-shared/test-helpers` subpath; do
+// NOT add them here. Production consumers must not call them.
+export { withRetry, computeBackoffMs } from './integrations/retry.js';
+export type { RetryOptions, RetryDecision } from './integrations/retry.js';
+export { CircuitBreaker, CircuitOpenError, getBreaker } from './integrations/circuit-breaker.js';
+export type { CircuitBreakerOptions } from './integrations/circuit-breaker.js';
+export {
+  resilientFetch,
+  ResilientFetchExhaustedError,
+  RETRY_AFTER_CAP_MS,
+  parseRetryAfter,
+} from './integrations/resilient-fetch.js';
+export type { ResilientFetchOptions } from './integrations/resilient-fetch.js';
+
+// Understand-Quickly registry integration (opt-in)
+export {
+  UNDERSTAND_QUICKLY_DISPATCH_URL,
+  UNDERSTAND_QUICKLY_EVENT_TYPE,
+  UNDERSTAND_QUICKLY_TOKEN_ENV,
+  buildUqDispatchPayload,
+  isValidOwnerRepo,
+  parseOwnerRepoFromRemote,
+  stripGitSuffix,
+} from './integrations/understand-quickly.js';
+export type { UqDispatchPayload } from './integrations/understand-quickly.js';
+
 // Shadow-mode diff + aggregation (RFC §6.3; Ring 2 SHARED #918)
 export { diffResolutions } from './scope-resolution/shadow/diff.js';
 export type {
@@ -0,0 +1,273 @@
+/**
+ * Per-process circuit breaker.
+ *
+ * Closed -> Open transition fires after `failureThreshold` consecutive
+ * failures. While Open, `check` throws `CircuitOpenError` until
+ * `cooldownMs` has elapsed since the breaker tripped. The first call
+ * after the cooldown enters Half-Open and consumes the *probe permit*:
+ * a recorded success returns to Closed; a recorded failure flips back
+ * to Open with a fresh timestamp.
+ *
+ * Half-open admits exactly one in-flight probe at a time. Concurrent
+ * callers attempting `check()` while a probe is outstanding receive
+ * `CircuitOpenError` with `retryAfterMs = halfOpenRetryAfterMs` (default
+ * 1000ms; configurable). This prevents the recovery-time thundering
+ * herd that defeats the breaker's "fail fast" promise.
+ *
+ * Outcome reporting splits permit-release from state-resolution:
+ *   - `recordSuccess` — releases the probe permit, resets the failure
+ *     counter, transitions to Closed. Reserved for true 2xx/3xx outcomes.
+ *   - `recordFailure` — releases the probe permit, increments the
+ *     consecutive-failure counter, transitions to Open with a fresh
+ *     `openedAt` (when called from Half-Open or when the threshold
+ *     trips from Closed).
+ *   - `recordNeutral` — releases the probe permit, BUT leaves state and
+ *     counter untouched. Used for outcomes that are neither evidence of
+ *     backend health nor evidence of backend failure (caller-driven
+ *     cancellation, local timeout, terminal 4xx client errors). Critical
+ *     design point: if `recordNeutral` did not release the permit, a
+ *     single `TimeoutError` from per-attempt `AbortSignal.timeout` would
+ *     route through `recordNeutral` and permanently park the breaker in
+ *     half-open until process restart. Releasing the permit while leaving
+ *     state half-open keeps the "neutral doesn't claim health" semantic
+ *     without creating that wedge.
+ *
+ * Pairing invariant: every successful `check()` MUST be paired with
+ * exactly one `record*()` on every code path including throws. Direct
+ * consumers should wrap the protected operation in `try/finally`:
+ *
+ *   breaker.check();
+ *   try {
+ *     const result = await operation();
+ *     breaker.recordSuccess();
+ *     return result;
+ *   } catch (err) {
+ *     // classify err and call recordFailure / recordNeutral / etc.
+ *     throw err;
+ *   }
+ *
+ * `resilientFetch`'s catch-all on `fetchImpl` already satisfies this
+ * for that consumer.
+ *
+ * Atomicity model: the half-open gate relies on JavaScript event-loop
+ * single-threadedness within a synchronous `check()` body. There is no
+ * `await` inside `check()`; concurrent callers serialize on microtask
+ * order, and exactly one observes `probeInFlight === false`. Do not
+ * introduce `await` inside `check()` without revisiting the gate. If
+ * this code is ever ported to a runtime with shared-memory threads
+ * (Node `worker_threads` with `SharedArrayBuffer`, Web Workers with
+ * shared registries), the boolean must become an atomic CAS — Resilience4j
+ * and Hystrix use atomic permits *because* they run in JVM thread pools.
+ *
+ * Runtime-agnostic: depends only on a `now()` clock and standard JS —
+ * no Node-only imports. Tests inject `now` to advance the clock
+ * deterministically without `vi.useFakeTimers()`.
+ */
+
+export class CircuitOpenError extends Error {
+  override readonly name = 'CircuitOpenError';
+  /** Approximate wait time before the breaker may transition to Half-Open
+   *  (or before the in-flight probe is expected to resolve). */
+  readonly retryAfterMs: number;
+
+  constructor(retryAfterMs: number, key?: string) {
+    super(
+      key
+        ? `Circuit '${key}' is open; retry in ${Math.ceil(retryAfterMs / 1000)}s`
+        : `Circuit is open; retry in ${Math.ceil(retryAfterMs / 1000)}s`,
+    );
+    this.retryAfterMs = retryAfterMs;
+  }
+}
+
+export interface CircuitBreakerOptions {
+  /** Consecutive failures required to trip Closed -> Open. */
+  failureThreshold?: number;
+  /** Milliseconds Open before the next call may probe (Half-Open). */
+  cooldownMs?: number;
+  /**
+   * Milliseconds to suggest in `CircuitOpenError.retryAfterMs` when the
+   * breaker is Half-Open with the probe permit consumed. Default 1000ms.
+   * Consumers with long-running protected ops (LLM streaming, large
+   * uploads) should raise this — the cooldown clock is no longer the
+   * right answer because cooldown has elapsed. Returning 0 invites
+   * retry storms; returning the full cooldown misleads about wait.
+   */
+  halfOpenRetryAfterMs?: number;
+  /** Optional key for error messages and registry lookups. */
+  key?: string;
+  /** Clock override — defaults to `Date.now`. Tests inject deterministic time. */
+  now?: () => number;
+}
+
+type State = 'closed' | 'open' | 'half-open';
+
+export class CircuitBreaker {
+  private readonly failureThreshold: number;
+  private readonly cooldownMs: number;
+  private readonly halfOpenRetryAfterMs: number;
+  private readonly key: string | undefined;
+  private readonly now: () => number;
+
+  private state: State = 'closed';
+  private consecutiveFailures = 0;
+  private openedAt: number | null = null;
+  /**
+   * True between a successful `check()` and the next `record*()` call
+   * during Half-Open. Gates concurrent callers from stampeding a still-
+   * recovering dependency. Boolean rather than counter — single-permit
+   * is the conservative end of the Hystrix/Resilience4j spectrum.
+   */
+  private probeInFlight = false;
+
+  constructor(opts: CircuitBreakerOptions = {}) {
+    this.failureThreshold = opts.failureThreshold ?? 3;
+    this.cooldownMs = opts.cooldownMs ?? 30_000;
+    this.halfOpenRetryAfterMs = opts.halfOpenRetryAfterMs ?? 1_000;
+    this.key = opts.key;
+    this.now = opts.now ?? (() => Date.now());
+  }
+
+  /**
+   * Throw `CircuitOpenError` if the breaker won't admit this call.
+   * Otherwise consume the half-open probe permit (if applicable) and
+   * return so the caller can attempt the protected work.
+   *
+   * Three rejection paths:
+   *   1. Open and still in cooldown → throws with `retryAfterMs` =
+   *      remaining cooldown.
+   *   2. Open with cooldown elapsed AND a probe is already in flight
+   *      (race: another caller transitioned to half-open and grabbed
+   *      the permit on a microtask before us) → throws with
+   *      `halfOpenRetryAfterMs`.
+   *   3. Half-Open with probe in flight → throws with `halfOpenRetryAfterMs`.
+   *
+   * **Pairing invariant**: every successful return from `check()` MUST
+   * be paired with exactly one `recordSuccess` / `recordFailure` /
+   * `recordNeutral` on every code path including thrown exceptions.
+   * Failing to pair leaves the probe permit consumed forever and
+   * wedges the breaker. See file-header JSDoc for the canonical
+   * try/finally pattern.
+   */
+  check(): void {
+    if (this.state === 'open' && this.openedAt !== null) {
+      const elapsed = this.now() - this.openedAt;
+      if (elapsed < this.cooldownMs) {
+        throw new CircuitOpenError(this.cooldownMs - elapsed, this.key);
+      }
+      // Cooldown elapsed — transition to Half-Open. The very next
+      // `probeInFlight` check below decides whether THIS caller gets
+      // the permit or hits the gate.
+      this.state = 'half-open';
+    }
+
+    if (this.state === 'half-open') {
+      if (this.probeInFlight) {
+        throw new CircuitOpenError(this.halfOpenRetryAfterMs, this.key);
+      }
+      this.probeInFlight = true;
+    }
+    // Closed state falls through silently.
+  }
+
+  recordSuccess(): void {
+    this.probeInFlight = false;
+    this.consecutiveFailures = 0;
+    this.state = 'closed';
+    this.openedAt = null;
+  }
+
+  recordFailure(): void {
+    this.probeInFlight = false;
+    this.consecutiveFailures += 1;
+    if (this.state === 'half-open' || this.consecutiveFailures >= this.failureThreshold) {
+      this.state = 'open';
+      this.openedAt = this.now();
+    }
+  }
+
+  /**
+   * Releases the probe permit BUT leaves state and counter untouched.
+   * Use when an attempt produced a response or error that should not
+   * influence breaker health in either direction — caller-driven aborts,
+   * local AbortSignal timeouts, terminal 4xx client errors.
+   *
+   * Why permit-release-without-state-resolution: if `recordNeutral` did
+   * not clear `probeInFlight`, a single `TimeoutError` from per-attempt
+   * `AbortSignal.timeout` (which routes through neutral classification)
+   * would permanently park the breaker in half-open. Since timeouts are
+   * an *expected* outcome under flaky-dependency conditions, the cited
+   * "per-attempt timeout bounds the stuck state" mitigation would itself
+   * be the trigger for a permanent wedge. Releasing the permit closes
+   * that loop while keeping the "neutral doesn't claim dependency
+   * health" semantic.
+   *
+   * Calling `recordSuccess` for these would erase legitimate prior
+   * failure signal; calling `recordFailure` would trip the breaker for
+   * outcomes the backend isn't responsible for.
+   */
+  recordNeutral(): void {
+    this.probeInFlight = false;
+    // State and consecutiveFailures are preserved by design.
+  }
+
+  /**
+   * Pure read — no state mutation, no permit accounting. Returns the
+   * *would-be* state at the current instant: 'half-open' if the breaker
+   * is open with cooldown elapsed (regardless of whether a probe is in
+   * flight), 'open' if open and still in cooldown, 'closed' otherwise.
+   *
+   * Inspection-only; safe to call from tests without consuming a probe
+   * permit. The implicit Open -> Half-Open transition that mutates
+   * `state` lives in `check()` only.
+   */
+  getState(): State {
+    if (this.state === 'open' && this.openedAt !== null) {
+      const elapsed = this.now() - this.openedAt;
+      if (elapsed >= this.cooldownMs) return 'half-open';
+    }
+    return this.state;
+  }
+  getConsecutiveFailures(): number {
+    return this.consecutiveFailures;
+  }
+  /** Inspection-only test accessor for the half-open probe permit. */
+  isProbeInFlight(): boolean {
+    return this.probeInFlight;
+  }
+  /** Timestamp (ms since epoch) when the breaker last transitioned to Open,
+   *  or `null` if it's currently Closed. Useful for computing remaining
+   *  cooldown without consuming a probe permit via `check()`. */
+  getOpenedAt(): number | null {
+    return this.openedAt;
+  }
+  /** Configured cooldown duration in milliseconds. */
+  getCooldownMs(): number {
+    return this.cooldownMs;
+  }
+}
+
+// ─── Per-process registry ────────────────────────────────────────────
+//
+// Single shared map keyed on caller-chosen strings. Used by
+// `resilient-fetch.ts` so multiple call sites targeting the same logical
+// endpoint share breaker state. Per-process only — not persisted.
+
+const registry = new Map<string, CircuitBreaker>();
+
+export function getBreaker(key: string, opts?: CircuitBreakerOptions): CircuitBreaker {
+  let breaker = registry.get(key);
+  if (!breaker) {
+    breaker = new CircuitBreaker({ ...opts, key });
+    registry.set(key, breaker);
+  }
+  return breaker;
+}
+
+/**
+ * Test-only: clear all registered breakers. Tests must call this in
+ * `beforeEach` to prevent breaker state from leaking across test cases.
+ */
+export function __resetBreakerRegistry__(): void {
+  registry.clear();
+}
@@ -0,0 +1,279 @@
+/**
+ * `resilientFetch` — fetch wrapped in retry + circuit breaker, with
+ * GitHub-flavoured retry classification baked in (Retry-After parsing,
+ * 401/403/404/422 treated as terminal client errors).
+ *
+ * Designed for the `gitnexus publish` GitHub `repository_dispatch`
+ * call, but the classification rules apply to any GitHub REST endpoint.
+ * Runtime-agnostic — no Node-only imports.
+ */
+
+import {
+  CircuitBreaker,
+  CircuitOpenError,
+  getBreaker,
+  type CircuitBreakerOptions,
+} from './circuit-breaker.js';
+import { computeBackoffMs, type RetryOptions } from './retry.js';
+
+export { CircuitOpenError };
+
+export interface ResilientFetchOptions {
+  /** Optional fetch implementation override. Defaults to `globalThis.fetch`. */
+  fetchImpl?: typeof fetch;
+  /**
+   * Logical key for the breaker. Defaults to `<host><pathname>` of the
+   * request URL — call sites targeting the same endpoint share breaker
+   * state regardless of query-string differences.
+   */
+  breakerKey?: string;
+  /** Per-call breaker override. Used for tests and one-off configuration. */
+  breaker?: CircuitBreaker;
+  /** Tuning knobs for the breaker registered under `breakerKey`. */
+  breakerOptions?: CircuitBreakerOptions;
+  /** Tuning knobs for the retry helper. */
+  retry?: Partial<Pick<RetryOptions, 'maxAttempts' | 'baseDelayMs' | 'capDelayMs'>> & {
+    sleep?: RetryOptions['sleep'];
+    random?: RetryOptions['random'];
+  };
+  /** Clock override propagated into Retry-After HTTP-date math and breaker. */
+  now?: () => number;
+}
+
+/** Cap on any single Retry-After wait — protects CLI from a buggy registry. */
+export const RETRY_AFTER_CAP_MS = 30_000;
+
+const DEFAULT_RETRY = {
+  maxAttempts: 3,
+  baseDelayMs: 500,
+  capDelayMs: 5_000,
+};
+
+/**
+ * Parse a `Retry-After` header value into milliseconds.
+ * Accepts either a delta-seconds integer (`"30"`) or an HTTP-date.
+ * Returns null on parse failure or negative deltas.
+ */
+export function parseRetryAfter(value: string | null, now: () => number = Date.now): number | null {
+  if (!value) return null;
+  const trimmed = value.trim();
+  if (trimmed === '') return null;
+
+  if (/^[0-9]+$/.test(trimmed)) {
+    const seconds = parseInt(trimmed, 10);
+    if (Number.isNaN(seconds) || seconds < 0) return null;
+    return seconds * 1000;
+  }
+
+  const target = Date.parse(trimmed);
+  if (Number.isNaN(target)) return null;
+  const delta = target - now();
+  return delta >= 0 ? delta : 0;
+}
+
+/** Internal: outcome classification used by the resilientFetch loop. */
+type Outcome =
+  | { kind: 'success'; resp: Response }
+  | { kind: 'terminal-client'; resp: Response } // 4xx other than 429: no retry, breaker neutral
+  | { kind: 'retryable-status'; resp: Response; afterMs: number | undefined } // 5xx, 429
+  | { kind: 'terminal-network'; err: unknown } // TimeoutError or AbortError: no retry, breaker neutral
+  | { kind: 'retryable-network'; err: unknown }; // DNS, ECONNRESET, etc.
+
+/** Exported for unit tests. */
+export function classifyOutcome(
+  result: { kind: 'error'; err: unknown } | { kind: 'response'; resp: Response },
+  now: () => number,
+): Outcome {
+  if (result.kind === 'error') {
+    // Both timer-fired aborts (`AbortSignal.timeout()` → `TimeoutError`)
+    // and caller-driven aborts (`AbortController.abort()` → `AbortError`)
+    // are terminal: retrying against an already-aborted signal would
+    // fail again immediately, and neither outcome reflects backend
+    // health. They route through the breaker's neutral path.
+    if (
+      result.err instanceof DOMException &&
+      (result.err.name === 'TimeoutError' || result.err.name === 'AbortError')
+    ) {
+      return { kind: 'terminal-network', err: result.err };
+    }
+    return { kind: 'retryable-network', err: result.err };
+  }
+  const resp = result.resp;
+  if (resp.status >= 200 && resp.status < 400) return { kind: 'success', resp };
+  if (resp.status === 429) {
+    // `resp.headers` is always present on a real `Response`, but tests
+    // sometimes stub `fetch` with a plain `{ ok, status }` object. Be
+    // defensive — a missing `Retry-After` falls through to exponential
+    // backoff, which is the correct behaviour anyway.
+    const retryAfterHeader =
+      typeof resp.headers?.get === 'function' ? resp.headers.get('Retry-After') : null;
+    const parsed = parseRetryAfter(retryAfterHeader, now);
+    return {
+      kind: 'retryable-status',
+      resp,
+      afterMs: parsed !== null ? Math.min(parsed, RETRY_AFTER_CAP_MS) : undefined,
+    };
+  }
+  if (resp.status >= 500) return { kind: 'retryable-status', resp, afterMs: undefined };
+  return { kind: 'terminal-client', resp };
+}
+
+const defaultSleep = (ms: number): Promise<void> =>
+  new Promise((resolve) => setTimeout(resolve, ms));
+
+function defaultBreakerKey(input: string | URL): string {
+  try {
+    const url = typeof input === 'string' ? new URL(input) : input;
+    return `${url.host}${url.pathname}`;
+  } catch {
+    return String(input);
+  }
+}
+
+/** Final error thrown when retries are exhausted on a 5xx / 429. */
+export class ResilientFetchExhaustedError extends Error {
+  override readonly name = 'ResilientFetchExhaustedError';
+  constructor(public readonly response: Response) {
+    super(`Request failed after retries (HTTP ${response.status})`);
+  }
+}
+
+/**
+ * Wrap `fetch` with bounded retries and a per-process circuit breaker.
+ *
+ * Semantics:
+ * - 5xx and 429 responses are retried; 429 honors `Retry-After` (capped).
+ * - Network throws are retried unless they are `TimeoutError` DOMExceptions.
+ * - Timeouts and 4xx (other than 429) are returned/thrown without retry
+ *   AND without incrementing the breaker — they reflect caller config
+ *   or local network state, not registry health.
+ * - Each `fetch` call carries the caller-supplied `signal` (e.g. an
+ *   `AbortSignal.timeout()`) — that timeout bounds each individual
+ *   attempt, not the whole retry sequence.
+ * - When the breaker is open, throws `CircuitOpenError` synchronously
+ *   without invoking `fetch`.
+ * - When retries are exhausted on a 5xx / 429, throws
+ *   `ResilientFetchExhaustedError` carrying the last response.
+ *
+ * Cumulative wall-clock budget:
+ *   maxAttempts × (per-attempt-timeout + capDelayMs)
+ *   With defaults (3, 500ms base, 5000ms cap) and a typical 15s per-attempt
+ *   timeout from the caller's signal, worst case is ~3 × (15s + 5s) = 60s.
+ *   Callers that want a tighter total bound should reduce `maxAttempts` or
+ *   wrap `resilientFetch` in their own outer `AbortSignal.timeout()`.
+ */
+export async function resilientFetch(
+  input: string | URL,
+  init: RequestInit | undefined,
+  opts: ResilientFetchOptions = {},
+): Promise<Response> {
+  const fetchImpl = opts.fetchImpl ?? globalThis.fetch;
+  const now = opts.now ?? (() => Date.now());
+  const breaker =
+    opts.breaker ?? getBreaker(opts.breakerKey ?? defaultBreakerKey(input), opts.breakerOptions);
+
+  const retryConfig = {
+    maxAttempts: opts.retry?.maxAttempts ?? DEFAULT_RETRY.maxAttempts,
+    baseDelayMs: opts.retry?.baseDelayMs ?? DEFAULT_RETRY.baseDelayMs,
+    capDelayMs: opts.retry?.capDelayMs ?? DEFAULT_RETRY.capDelayMs,
+  };
+  const sleep = opts.retry?.sleep ?? defaultSleep;
+  const random = opts.retry?.random ?? Math.random;
+
+  // Fail fast on an open breaker, before invoking fetch.
+  breaker.check();
+
+  for (let attempt = 0; attempt < retryConfig.maxAttempts; attempt++) {
+    let result: { kind: 'error'; err: unknown } | { kind: 'response'; resp: Response };
+    try {
+      // CodeQL js/server-side-request-forgery — flagged because `input`
+      // is caller-supplied. Suppressed: every concrete caller passes
+      // either a hardcoded URL constant (UNDERSTAND_QUICKLY_DISPATCH_URL,
+      // OpenRouter base URL) or a value derived from configuration
+      // (env vars, saved settings, the local backend URL). User-input
+      // request fields (e.g. PR title, repo name) never flow into
+      // `input`. Validating URL shape here would push false-positive
+      // rejection onto every caller — wrong layer for the check.
+      // lgtm[js/server-side-request-forgery]
+      // codeql[js/server-side-request-forgery]
+      const resp = await fetchImpl(input, init);
+      result = { kind: 'response', resp };
+    } catch (err) {
+      result = { kind: 'error', err };
+    }
+
+    const outcome = classifyOutcome(result, now);
+
+    switch (outcome.kind) {
+      case 'success':
+        breaker.recordSuccess();
+        return outcome.resp;
+
+      case 'terminal-client':
+        // 4xx: do not count as breaker failure (the server is healthy
+        // and rejecting our request — auth, scope, or routing). But
+        // also do NOT call recordSuccess: a 401 sandwiched between
+        // 5xx responses would otherwise erase the running outage
+        // signal. The breaker's neutral path leaves state untouched.
+        breaker.recordNeutral();
+        return outcome.resp;
+
+      case 'terminal-network':
+        // Either `AbortSignal.timeout()` fired locally OR an external
+        // caller cancelled the request via AbortController. The server
+        // never had a chance to answer; this reflects the user's
+        // network or an explicit cancel, not registry health. Don't
+        // punish the breaker AND don't reset its outage signal.
+        breaker.recordNeutral();
+        throw outcome.err;
+
+      case 'retryable-status':
+        if (attempt + 1 >= retryConfig.maxAttempts) {
+          breaker.recordFailure();
+          throw new ResilientFetchExhaustedError(outcome.resp);
+        }
+        await sleep(
+          computeBackoffMs(
+            attempt,
+            retryConfig.baseDelayMs,
+            retryConfig.capDelayMs,
+            outcome.afterMs,
+            random,
+          ),
+        );
+        break;
+
+      case 'retryable-network':
+        if (attempt + 1 >= retryConfig.maxAttempts) {
+          breaker.recordFailure();
+          throw outcome.err;
+        }
+        await sleep(
+          computeBackoffMs(
+            attempt,
+            retryConfig.baseDelayMs,
+            retryConfig.capDelayMs,
+            undefined,
+            random,
+          ),
+        );
+        break;
+
+      default: {
+        // Exhaustiveness guard. If a sixth `Outcome` kind is added in
+        // future, TypeScript will refuse to assign it to `never` and
+        // this line forces the maintainer to add an explicit arm
+        // rather than silently fall through to retry/no-retry behaviour.
+        const _exhaustive: never = outcome;
+        throw new Error(`resilientFetch: unhandled outcome ${JSON.stringify(_exhaustive)}`);
+      }
+    }
+  }
+
+  // Unreachable: every iteration of the loop either returns (success
+  // / terminal-client) or throws (terminal-network / retry exhaustion).
+  // The throw is here purely so TypeScript's control-flow analysis sees
+  // the function never falls off the end without producing `Promise<Response>`.
+  /* c8 ignore next 2 */
+  throw new Error('resilientFetch: retry loop terminated unexpectedly');
+}
@@ -0,0 +1,105 @@
+/**
+ * Bounded retry helper with full-jitter exponential backoff.
+ *
+ * Runtime-agnostic: depends only on `setTimeout`, `Math.random`, and the
+ * Promise machinery — no Node-only imports. Safe to consume from CLI,
+ * server, or browser callers.
+ *
+ * Pattern reference: gitnexus/src/core/embeddings/http-client.ts. This
+ * helper is the upgraded form: classification is caller-supplied (so
+ * 4xx-vs-5xx-vs-timeout decisions live with the protocol that knows
+ * them), backoff is exponential with full jitter, and an optional
+ * `afterMs` lets callers honor `Retry-After` headers.
+ */
+
+export interface RetryOptions {
+  /** Initial delay before the first retry attempt, in milliseconds. */
+  baseDelayMs: number;
+  /** Upper bound on any single delay, in milliseconds. */
+  capDelayMs: number;
+  /** Total attempts including the first call. Must be >= 1. */
+  maxAttempts: number;
+  /**
+   * Decide whether to retry after a thrown error.
+   * Return `{retry:false}` to terminate immediately and rethrow.
+   * Return `{retry:true}` to retry with exponential-backoff jitter.
+   * Return `{retry:true, afterMs}` to wait at least `afterMs` (still
+   * subject to `capDelayMs`) — used by callers parsing `Retry-After`.
+   */
+  isRetryable: (err: unknown, attempt: number) => RetryDecision;
+  /** Sleep override — defaults to `setTimeout`. Tests inject fake timers. */
+  sleep?: (ms: number) => Promise<void>;
+  /** Random override — defaults to `Math.random`. Tests inject seeded values. */
+  random?: () => number;
+}
+
+export type RetryDecision = { retry: false } | { retry: true; afterMs?: number };
+
+const defaultSleep = (ms: number): Promise<void> =>
+  new Promise((resolve) => setTimeout(resolve, ms));
+
+/**
+ * Compute the delay before the next retry attempt.
+ *
+ * - When the caller specifies `afterMs` (e.g., from `Retry-After`), use
+ *   `min(afterMs, capDelayMs)` so a misbehaving server can't pin the
+ *   client for an arbitrarily long wait.
+ * - Otherwise compute full-jitter exponential backoff:
+ *   `random() * min(cap, base * 2^attempt)`. Full jitter (rather than
+ *   "equal jitter") avoids retry-storm thundering herd, per AWS
+ *   guidance on backoff strategies.
+ */
+export function computeBackoffMs(
+  attempt: number,
+  baseDelayMs: number,
+  capDelayMs: number,
+  afterMs: number | undefined,
+  random: () => number,
+): number {
+  if (afterMs !== undefined) {
+    return Math.min(Math.max(0, afterMs), capDelayMs);
+  }
+  const exponential = baseDelayMs * Math.pow(2, attempt);
+  const upper = Math.min(capDelayMs, exponential);
+  return Math.floor(random() * upper);
+}
+
+/**
+ * Execute `fn` with bounded retries.
+ *
+ * The classification of "retryable" is the caller's responsibility — see
+ * `resilient-fetch.ts` for the GitHub-dispatch-specific rules. This
+ * helper is the mechanical retry loop only.
+ */
+export async function withRetry<T>(
+  fn: (attempt: number) => Promise<T>,
+  opts: RetryOptions,
+): Promise<T> {
+  if (opts.maxAttempts < 1) {
+    throw new Error(`withRetry: maxAttempts must be >= 1, got ${opts.maxAttempts}`);
+  }
+  const sleep = opts.sleep ?? defaultSleep;
+  const random = opts.random ?? Math.random;
+
+  let lastError: unknown;
+  for (let attempt = 0; attempt < opts.maxAttempts; attempt++) {
+    try {
+      return await fn(attempt);
+    } catch (err) {
+      lastError = err;
+      const decision = opts.isRetryable(err, attempt);
+      if (!decision.retry) throw err;
+      // Don't sleep after the final attempt.
+      if (attempt + 1 >= opts.maxAttempts) break;
+      const delayMs = computeBackoffMs(
+        attempt,
+        opts.baseDelayMs,
+        opts.capDelayMs,
+        decision.afterMs,
+        random,
+      );
+      if (delayMs > 0) await sleep(delayMs);
+    }
+  }
+  throw lastError;
+}
@@ -0,0 +1,151 @@
+/**
+ * Understand-Quickly registry integration helpers.
+ *
+ * Pure, runtime-agnostic logic for opting in to publishing a GitNexus
+ * index to the [`looptech-ai/understand-quickly`](https://github.com/looptech-ai/understand-quickly)
+ * registry. Lives in `gitnexus-shared` so both the Node CLI and any
+ * future browser-side surface can construct identical dispatch payloads.
+ *
+ * Network I/O lives in the CLI command (`gitnexus/src/cli/publish.ts`)
+ * to keep this module free of Node-only imports — see the comment at
+ * the top of `gitnexus-shared/src/graph/types.ts`.
+ *
+ * The protocol contract (single dispatch event, no graph upload) is
+ * documented at:
+ *   https://github.com/looptech-ai/understand-quickly/blob/main/docs/integrations/protocol.md
+ */
+
+/**
+ * URL of the registry repo's repository_dispatch endpoint. Hardcoded
+ * because the registry is the canonical home for this integration —
+ * users who want a private registry can fork and patch.
+ */
+export const UNDERSTAND_QUICKLY_DISPATCH_URL =
+  'https://api.github.com/repos/looptech-ai/understand-quickly/dispatches';
+
+/**
+ * Event type the registry's sync workflow listens for.
+ * See `looptech-ai/understand-quickly/.github/workflows/sync.yml`.
+ */
+export const UNDERSTAND_QUICKLY_EVENT_TYPE = 'sync-entry';
+
+/** Environment variable that gates the dispatch. */
+export const UNDERSTAND_QUICKLY_TOKEN_ENV = 'UNDERSTAND_QUICKLY_TOKEN';
+
+export interface UqDispatchPayload {
+  event_type: typeof UNDERSTAND_QUICKLY_EVENT_TYPE;
+  client_payload: {
+    /** `<owner>/<repo>` shape — must match the registered entry. */
+    id: string;
+  };
+}
+
+/**
+ * Build the JSON body for the `repository_dispatch` ping. Pure — no
+ * env reads, no network. Validates that `id` looks like `owner/repo`
+ * (one slash, no whitespace, both halves non-empty) so a misconfigured
+ * caller fails loudly before the round-trip.
+ */
+export function buildUqDispatchPayload(id: string): UqDispatchPayload {
+  if (!isValidOwnerRepo(id)) {
+    throw new Error(
+      `[understand-quickly] expected id of the form "owner/repo", got "${id}". ` +
+        `The registry uses this string to look up your entry in registry.json — ` +
+        `it must match the GitHub owner/repo of the source code, not a local path.`,
+    );
+  }
+  return {
+    event_type: UNDERSTAND_QUICKLY_EVENT_TYPE,
+    client_payload: { id },
+  };
+}
+
+/**
+ * `owner/repo` validation. Conservative on purpose: GitHub's actual
+ * naming rules are looser, but we want to catch local paths
+ * (`/Users/...`), bare slugs (`my-repo`), and accidental whitespace.
+ *
+ * Matches GitHub's published slug rules:
+ *   owner: starts with alnum, then alnum/hyphen only, must end with
+ *          alnum (no trailing hyphen — GitHub rejects this at account
+ *          creation, so a `my-org-/repo` input would otherwise pass us
+ *          and 422 from GitHub). No underscore, no dot. Length cap 39.
+ *   repo:  any of alnum/dot/hyphen/underscore. Length cap 100.
+ */
+export function isValidOwnerRepo(id: string): boolean {
+  return /^[A-Za-z0-9](?:[A-Za-z0-9-]{0,37}[A-Za-z0-9])?\/[A-Za-z0-9._-]{1,100}$/.test(id);
+}
+
+/**
+ * Strip a single trailing `.git` (case-insensitive) and any trailing
+ * slashes from a URL-ish string. Bounded linear: each character is
+ * visited at most twice, no backtracking.
+ *
+ * Replaces `s.replace(/\.git\/*$/i, '').replace(/\/+$/, '')` which
+ * CodeQL's polynomial-regex check (codeql/js/polynomial-redos) flags as
+ * a worst-case O(n²) on adversarial input like "////.../x".
+ */
+export function stripGitSuffix(input: string): string {
+  let end = input.length;
+  // Trim trailing '/'.
+  while (end > 0 && input.charCodeAt(end - 1) === 0x2f) end--;
+  // Drop one trailing '.git' (case-insensitive).
+  if (end >= 4) {
+    const tail = input.slice(end - 4, end).toLowerCase();
+    if (tail === '.git') end -= 4;
+  }
+  // Trim trailing '/' that may have sat between '.git' and the rest.
+  while (end > 0 && input.charCodeAt(end - 1) === 0x2f) end--;
+  return input.slice(0, end);
+}
+
+/**
+ * Parse `owner/repo` out of a git remote URL. Mirrors the heuristic in
+ * `gitnexus/src/storage/git.ts:parseRepoNameFromUrl` but keeps both
+ * halves so we can build a registry id. Returns `null` on shapes we
+ * don't recognise.
+ *
+ * Examples:
+ *   git@github.com:looptech-ai/understand-quickly.git
+ *   https://github.com/looptech-ai/understand-quickly
+ *   ssh://git@github.com/looptech-ai/understand-quickly.git
+ */
+export function parseOwnerRepoFromRemote(url: string | null | undefined): string | null {
+  if (!url) return null;
+  const trimmed = url.trim();
+  if (!trimmed) return null;
+  // Strip a trailing `.git` (case-insensitive) and any trailing slashes
+  // so https://h/o/r and https://h/o/r.git collapse to the same id.
+  // Bounded-linear helper avoids the polynomial-regex CodeQL alert.
+  const stripped = stripGitSuffix(trimmed);
+
+  // SCP-form SSH (`git@host:owner/repo`). Capture host so we can reject
+  // non-GitHub remotes — a GitLab origin like
+  // `https://gitlab.example.com/group/sub/project.git` would otherwise
+  // silently dispatch the wrong id (LOW 9).
+  const ssh = stripped.match(/^[^@]+@([^:]+):([^/]+)\/([^/]+)$/);
+  if (ssh) {
+    const host = ssh[1].toLowerCase();
+    if (host !== 'github.com' && host !== 'www.github.com') return null;
+    return `${ssh[2]}/${ssh[3]}`;
+  }
+
+  // URL forms (https://, ssh://, git://, file://) — last two path segments.
+  const url2 = stripped.match(/^[a-zA-Z][a-zA-Z0-9+.-]*:\/\/([^/]+)\/(.+)$/);
+  if (url2) {
+    // Strip optional `userinfo@` (e.g. `ssh://git@github.com/...`).
+    const authority = url2[1];
+    const atIdx = authority.lastIndexOf('@');
+    const hostAndPort = atIdx >= 0 ? authority.slice(atIdx + 1) : authority;
+    // Strip `:port` suffix if present.
+    const colonIdx = hostAndPort.indexOf(':');
+    const host = (colonIdx >= 0 ? hostAndPort.slice(0, colonIdx) : hostAndPort).toLowerCase();
+    if (host !== 'github.com' && host !== 'www.github.com') return null;
+    const segments = url2[2].split('/').filter(Boolean);
+    if (segments.length >= 2) {
+      const [owner, repo] = segments.slice(-2);
+      return `${owner}/${repo}`;
+    }
+  }
+  return null;
+}
@@ -56,11 +56,21 @@ for (const [lang, exts] of Object.entries(EXTENSION_MAP) as [
  }
 }

+/**
+ * Laravel Blade templates are source templates whose filename convention ends
+ * in `.blade.php`.  They may contain PHP snippets, but the full file is not a
+ * pure PHP translation unit and must not enter the generic PHP provider path.
+ */
+export const isBladeTemplateFilename = (filePath: string): boolean =>
+  filePath.replace(/\\/g, '/').toLowerCase().endsWith('.blade.php');
+
 /**
 * Map file extension to SupportedLanguage enum.
 * Returns null if the file extension is not recognized.
 */
 export const getLanguageFromFilename = (filename: string): SupportedLanguages | null => {
+  if (isBladeTemplateFilename(filename)) return null;
+
  // Fast path: check the extension map
  const lastDot = filename.lastIndexOf('.');
  if (lastDot >= 0) {
@@ -138,6 +148,8 @@ const AUXILIARY_BASENAME_MAP: Record<string, string> = {
 * Returns 'text' for unrecognised files.
 */
 export const getSyntaxLanguageFromFilename = (filePath: string): string => {
+  if (isBladeTemplateFilename(filePath)) return 'markup';
+
  const lang = getLanguageFromFilename(filePath);
  if (lang) return SYNTAX_MAP[lang];
  const ext = filePath.split('.').pop()?.toLowerCase();
@@ -93,7 +93,7 @@ export interface FinalizeHooks {
    targetRaw: string,
    fromFile: string,
    workspaceIndex: WorkspaceIndex,
-  ): string | null;
+  ): string | readonly string[] | null;

  /**
   * For a wildcard `import * from M`, return the names visible in the
@@ -127,20 +127,22 @@ export interface FinalizedScc {
 /**
 * Counters reported by `finalize`.
 *
- * **Counting granularity** — all edge counters are **per-`ParsedImport`**,
- * not per-materialized-`ImportEdge`. A single `wildcard` ParsedImport that
- * expands to N exports counts as one linked edge in these stats; the
- * materialized output (`FinalizeOutput.imports`) will have N edges for
- * that input. `dynamic-unresolved` ParsedImports count as linked (they
- * pass through with no `linkStatus`), so `linkedEdges` ≠ "has a
+ * **Counting granularity** — `totalEdges` is **per-generated-`ImportEdgeDraft`**,
+ * which may exceed the number of `ParsedImport` records when
+ * `resolveImportTarget` returns a multi-file array (e.g. Go package-scoped
+ * imports fan out to every `.go` file in the target directory). A single
+ * `wildcard` ParsedImport that expands to N exports also counts as one
+ * linked edge here; the materialized output (`FinalizeOutput.imports`) will
+ * have N edges for that input. `dynamic-unresolved` ParsedImports count as
+ * linked (they pass through with no `linkStatus`), so `linkedEdges` ≠ "has a
 * BindingRef" — use the `bindings` map for that.
 *
- * In other words: `totalEdges === input.parsedImports.length` summed
+ * In other words: `totalEdges >= input.parsedImports.length` summed
 * across files, and `linkedEdges + unresolvedEdges === totalEdges`.
 */
 export interface FinalizeStats {
  readonly totalFiles: number;
-  /** Total `ParsedImport` records seen across all files. */
+  /** Total `ImportEdgeDraft` records generated (≥ ParsedImport count). */
  readonly totalEdges: number;
  /**
   * `ParsedImport`s whose finalized edge does NOT carry
@@ -179,9 +181,9 @@ export function finalize(input: FinalizeInput, hooks: FinalizeHooks): FinalizeOu
  for (const file of input.files) {
    const drafts: ImportEdgeDraft[] = [];
    for (const parsed of file.parsedImports) {
-      const draft = makeEdgeDraft(parsed, file, hooks, input.workspaceIndex);
-      drafts.push(draft);
-      totalEdges++;
+      const draftArray = makeEdgeDrafts(parsed, file, hooks, input.workspaceIndex);
+      drafts.push(...draftArray);
+      totalEdges += draftArray.length;
    }
    edgeIndex.set(file.filePath, drafts);
  }
@@ -320,12 +322,12 @@ interface ImportEdgeDraft {
  finalized: ImportEdge | null;
 }

-function makeEdgeDraft(
+function makeEdgeDrafts(
  parsed: ParsedImport,
  file: FinalizeFile,
  hooks: FinalizeHooks,
  workspace: WorkspaceIndex,
-): ImportEdgeDraft {
+): ImportEdgeDraft[] {
  // Dynamic-unresolved passes through — no `BindingRef`, no target file.
  if (parsed.kind === 'dynamic-unresolved') {
    const base: ImportEdge = {
@@ -334,14 +336,16 @@ function makeEdgeDraft(
      targetExportedName: '',
      kind: 'dynamic-unresolved',
    };
-    return {
-      source: parsed,
-      fromFile: file.filePath,
-      fromScope: file.moduleScope,
-      targetFile: null,
-      base,
-      finalized: base, // already fully finalized
-    };
+    return [
+      {
+        source: parsed,
+        fromFile: file.filePath,
+        fromScope: file.moduleScope,
+        targetFile: null,
+        base,
+        finalized: base, // already fully finalized
+      },
+    ];
  }

  const targetFile = hooks.resolveImportTarget(parsed.targetRaw ?? '', file.filePath, workspace);
@@ -355,14 +359,16 @@ function makeEdgeDraft(
      kind: edgeKindFor(parsed),
      linkStatus: 'unresolved',
    };
-    return {
-      source: parsed,
-      fromFile: file.filePath,
-      fromScope: file.moduleScope,
-      targetFile: null,
-      base,
-      finalized: base,
-    };
+    return [
+      {
+        source: parsed,
+        fromFile: file.filePath,
+        fromScope: file.moduleScope,
+        targetFile: null,
+        base,
+        finalized: base,
+      },
+    ];
  }

  // Resolvable at the file level; intra-SCC fixpoint may still fail to fill
@@ -370,21 +376,24 @@ function makeEdgeDraft(
  // and resolved-dynamic imports are terminal at the file level — no
  // `targetDefId` needed since they materialize no `BindingRef`. Pre-
  // finalize them here so the fixpoint loop skips them entirely.
-  const base: ImportEdge = {
-    localName: extractLocalName(parsed),
-    targetFile,
-    targetExportedName: extractExportedName(parsed),
-    kind: edgeKindFor(parsed),
-  };
+  const targetFiles = Array.isArray(targetFile) ? targetFile : [targetFile];
  const isFileLevelTerminal = parsed.kind === 'side-effect' || parsed.kind === 'dynamic-resolved';
-  return {
-    source: parsed,
-    fromFile: file.filePath,
-    fromScope: file.moduleScope,
-    targetFile,
-    base,
-    finalized: isFileLevelTerminal ? base : null,
-  };
+  return targetFiles.map((tf) => {
+    const base: ImportEdge = {
+      localName: extractLocalName(parsed),
+      targetFile: tf,
+      targetExportedName: extractExportedName(parsed),
+      kind: edgeKindFor(parsed),
+    };
+    return {
+      source: parsed,
+      fromFile: file.filePath,
+      fromScope: file.moduleScope,
+      targetFile: tf,
+      base,
+      finalized: isFileLevelTerminal ? base : null,
+    };
+  });
 }

 function edgeKindFor(parsed: ParsedImport): ImportEdge['kind'] {
@@ -824,7 +833,16 @@ function expandWildcard(
  if (target === undefined) return [edge];

  const names = hooks.expandsWildcardTo(edge.targetModuleScope, workspace);
-  if (names.length === 0) return [];
+  if (names.length === 0) {
+    // Resolved wildcard with zero propagating names is still a real file-
+    // level dependency (e.g. a C++ header that only declares classes —
+    // `#include` is a valid IMPORTS edge, but unqualified-binding names
+    // are correctly empty since class methods require `Class::method`).
+    // Preserve the original wildcard edge so the file→file IMPORTS edge
+    // survives; downstream binding materialization sees no propagated
+    // names because the edge has no `targetExportedName`/`localName`.
+    return [edge];
+  }

  const expanded: ImportEdge[] = [];
  for (const name of names) {
@@ -40,11 +40,27 @@ export interface MethodDispatchIndex {
  readonly mroByOwnerDefId: ReadonlyMap<DefId, readonly DefId[]>;
  /** Interfaces / traits → classes that implement them. */
  readonly implsByInterfaceDefId: ReadonlyMap<DefId, readonly DefId[]>;
+  /**
+   * Optional parallel MRO view that EXCLUDES mixin-like augmentation
+   * (e.g., PHP traits). Populated only when the input supplies
+   * `computeExtendsOnlyMro`. Used by the super-branch dispatch in
+   * `receiver-bound-calls` so that `parent::method()` walks the
+   * inheritance chain only, not the trait-augmented one. Undefined for
+   * languages without mixin-like semantics — callers should fall back
+   * to `mroFor` when this is missing.
+   */
+  readonly extendsOnlyMroByOwnerDefId?: ReadonlyMap<DefId, readonly DefId[]>;

  /** `mroByOwnerDefId.get`, with an empty frozen array on miss. */
  mroFor(ownerDefId: DefId): readonly DefId[];
  /** `implsByInterfaceDefId.get`, with an empty frozen array on miss. */
  implementorsOf(interfaceDefId: DefId): readonly DefId[];
+  /**
+   * `extendsOnlyMroByOwnerDefId.get`, with an empty frozen array on miss.
+   * Undefined when `extendsOnlyMroByOwnerDefId` was not populated; callers
+   * should treat this as equivalent to `mroFor` for non-mixin languages.
+   */
+  readonly extendsOnlyMroFor?: (ownerDefId: DefId) => readonly DefId[];
 }

 export interface MethodDispatchInput {
@@ -81,12 +97,25 @@ export interface MethodDispatchInput {
   * write-wins policy and fires at most once per unique owner.
   */
  readonly implementsOf: (ownerDefId: DefId) => readonly DefId[];
+  /**
+   * Optional: return the EXTENDS-only ancestor chain for `ownerDefId`,
+   * excluding the owner itself AND any mixin-like augmentation (e.g.,
+   * PHP traits). Languages without mixin semantics leave this undefined
+   * and the index's `extendsOnlyMroByOwnerDefId` stays unpopulated.
+   *
+   * Same contract as `computeMro`: pure, deterministic, `[]` on no parents.
+   * Called at most once per unique owner (first-write-wins).
+   */
+  readonly computeExtendsOnlyMro?: (ownerDefId: DefId) => readonly DefId[];
 }

 // ─── Builder ────────────────────────────────────────────────────────────────

 export function buildMethodDispatchIndex(input: MethodDispatchInput): MethodDispatchIndex {
  const mroByOwnerDefId = new Map<DefId, readonly DefId[]>();
+  const extendsOnlyByOwnerDefId = input.computeExtendsOnlyMro
+    ? new Map<DefId, readonly DefId[]>()
+    : undefined;
  const implsBuilding = new Map<DefId, DefId[]>();
  const implsSeen = new Map<DefId, Set<DefId>>();

@@ -97,6 +126,14 @@ export function buildMethodDispatchIndex(input: MethodDispatchInput): MethodDisp
      const chain = input.computeMro(ownerId);
      mroByOwnerDefId.set(ownerId, Object.freeze(chain.slice()));
    }
+    if (
+      input.computeExtendsOnlyMro !== undefined &&
+      extendsOnlyByOwnerDefId !== undefined &&
+      !extendsOnlyByOwnerDefId.has(ownerId)
+    ) {
+      const extOnly = input.computeExtendsOnlyMro(ownerId);
+      extendsOnlyByOwnerDefId.set(ownerId, Object.freeze(extOnly.slice()));
+    }

    for (const ifaceId of input.implementsOf(ownerId)) {
      let seen = implsSeen.get(ifaceId);
@@ -121,7 +158,7 @@ export function buildMethodDispatchIndex(input: MethodDispatchInput): MethodDisp
    implsByInterfaceDefId.set(ifaceId, Object.freeze(owners.slice()));
  }

-  return wrapIndex(mroByOwnerDefId, implsByInterfaceDefId);
+  return wrapIndex(mroByOwnerDefId, implsByInterfaceDefId, extendsOnlyByOwnerDefId);
 }

 // ─── Internal ───────────────────────────────────────────────────────────────
@@ -131,8 +168,9 @@ const EMPTY: readonly DefId[] = Object.freeze([]);
 function wrapIndex(
  mroByOwnerDefId: Map<DefId, readonly DefId[]>,
  implsByInterfaceDefId: Map<DefId, readonly DefId[]>,
+  extendsOnlyMroByOwnerDefId: Map<DefId, readonly DefId[]> | undefined,
 ): MethodDispatchIndex {
-  return {
+  const base: MethodDispatchIndex = {
    mroByOwnerDefId,
    implsByInterfaceDefId,
    mroFor(ownerDefId: DefId): readonly DefId[] {
@@ -142,4 +180,14 @@ function wrapIndex(
      return implsByInterfaceDefId.get(interfaceDefId) ?? EMPTY;
    },
  };
+  if (extendsOnlyMroByOwnerDefId !== undefined) {
+    return {
+      ...base,
+      extendsOnlyMroByOwnerDefId,
+      extendsOnlyMroFor(ownerDefId: DefId): readonly DefId[] {
+        return extendsOnlyMroByOwnerDefId.get(ownerDefId) ?? EMPTY;
+      },
+    };
+  }
+  return base;
 }
@@ -21,6 +21,7 @@
 * (defined in `./types.ts`).
 */

+import type { ParameterTypeClass } from './symbol-definition.js';
 import type { Range, ScopeId } from './types.js';

 /**
@@ -79,4 +80,11 @@ export interface ReferenceSite {
   * (C#: `42` → `'int'`, `"alice"` → `'string'`).
   */
  readonly argumentTypes?: readonly string[];
+  /**
+   * Optional per-argument type-shape sidecar for languages that need
+   * cv/ref/pointer distinctions during constraint filtering. This is
+   * intentionally separate from `argumentTypes`, which stays normalized
+   * for existing overload narrowing and conversion-rank logic.
+   */
+  readonly argumentTypeClasses?: readonly ParameterTypeClass[];
 }
@@ -13,7 +13,7 @@
 */

 import type { NodeLabel } from '../../graph/types.js';
-import type { SymbolDefinition } from '../symbol-definition.js';
+import type { ParameterTypeClass, SymbolDefinition } from '../symbol-definition.js';
 import type { Callsite, DefId } from '../types.js';
 import type { DefIndex } from '../def-index.js';
 import type { QualifiedNameIndex } from '../qualified-name-index.js';
@@ -30,10 +30,50 @@ export interface RegistryProviders {
   * when absent, every candidate receives `'unknown'` (neutral signal).
   */
  arityCompatibility?(callsite: Callsite, def: SymbolDefinition): ArityVerdict;
+
+  /**
+   * Language-specific constraint compatibility between a callsite and a
+   * candidate `def`. Mirrors `arityCompatibility` and shares its three-valued
+   * verdict shape; the third value `'unknown'` MUST keep the candidate
+   * (monotonicity: adding a predicate can only narrow correctly, never
+   * produce a wrong edge). Consulted by `narrowOverloadCandidates` after
+   * arity + type filters when a candidate carries `templateConstraints`.
+   *
+   * Optional; when absent the constraint filter is a pass-through. Languages
+   * with no constrained-overload semantics leave this undefined.
+   */
+  constraintCompatibility?(
+    callsite: Callsite,
+    def: SymbolDefinition,
+    ctx: ConstraintContext,
+  ): ArityVerdict;
 }

 export type ArityVerdict = 'compatible' | 'unknown' | 'incompatible';

+/**
+ * Context threaded into `constraintCompatibility`. Kept minimal in the
+ * Tier-A scope (only `argumentTypes`, riding here until a separate
+ * `Callsite`-widening refactor moves them onto the call site directly).
+ * Future Tier-B graph-aware predicates (`is_base_of_v`, etc.) will widen
+ * this interface with `lookupTypeByName` and similar helpers.
+ */
+export interface ConstraintContext {
+  /**
+   * Per-slot argument types at the call site, normalized per the language
+   * adapter. Empty string means unknown. Same convention as
+   * `narrowOverloadCandidates`' `argTypes` parameter.
+   */
+  readonly argumentTypes?: readonly string[];
+  /**
+   * Optional shape-preserving sidecar aligned with `argumentTypes`.
+   * Unknown or unsupported slots should be omitted by producers or
+   * marked with `indirection: 'unknown'`; consumers must preserve the
+   * monotonic fallback and return 'unknown' instead of guessing.
+   */
+  readonly argumentTypeClasses?: readonly ParameterTypeClass[];
+}
+
 // ─── Owner-scoped contributor (concrete shape for `RegistryContributor`) ────

 /**
@@ -60,6 +100,19 @@ export interface OwnerScopedContributor {
  byName(name: string): readonly SymbolDefinition[];
 }

+/**
+ * Required owner-keyed lookup hook for Step 2 receiver/MRO member walks.
+ * Production callers wire this to the SemanticModel's authoritative
+ * method/field/nested-type registries so each `(ownerDefId, memberName)`
+ * probe is O(1). Implementations MUST return `[]` on an indexed miss —
+ * Step 2 treats `[]` as authoritative and does not consult `defs` for a
+ * fallback scan.
+ */
+export type OwnedMembersByOwnerLookup = (
+  ownerDefId: DefId,
+  memberName: string,
+) => readonly SymbolDefinition[];
+
 // ─── Top-level context threaded through every lookup ───────────────────────

 export interface RegistryContext {
@@ -67,6 +120,7 @@ export interface RegistryContext {
  readonly defs: DefIndex;
  readonly qualifiedNames: QualifiedNameIndex;
  readonly moduleScopes: ModuleScopeIndex;
+  readonly ownedMembersByOwner: OwnedMembersByOwnerLookup;
  /**
   * Method-dispatch index; required for method/field registries that
   * honor `useReceiverTypeBinding`. Omit for class-only lookups.
@@ -27,8 +27,10 @@
 *   is true, resolve the receiver's type at `startScope` (from
 *   `scope.typeBindings`), then walk the MRO via
 *   `MethodDispatchIndex.mroFor(ownerDefId)`. Membership per owner comes
- *   through `RegistryContext.methodDispatch` + owner lookups into
- *   `scope.ownedDefs`; each hit records a raw signal with the owner's
+ *   through an optional `RegistryContext.ownedMembersByOwner` hook when
+ *   supplied (`undefined` → fall back to `defs.byId`; `[]` → indexed
+ *   miss), otherwise via the compatibility fallback scan over
+ *   `defs.byId`; each hit records a raw signal with the owner's
 *   MRO depth.
 *
 * **Step 3 — Owner-scoped contributor.** When
@@ -263,13 +265,14 @@ function walkReceiverTypeBinding(
  // Walk the owner itself at depth 0, then its MRO chain.
  const walk: DefId[] = [ownerDefId, ...ctx.methodDispatch.mroFor(ownerDefId)];

-  for (let mroDepth = 0; mroDepth < walk.length; mroDepth++) {
-    const currentOwnerId = walk[mroDepth]!;
+  let mroDepth = 0;
+  for (const currentOwnerId of walk) {
    const members = collectOwnedMembers(currentOwnerId, name, ctx);
    for (const def of members) {
      if (!acceptedKinds.has(def.type)) continue;
      recordTypeBindingHit(perCandidate, def, mroDepth, ownerDefId);
    }
+    mroDepth++;
  }
 }

@@ -333,23 +336,7 @@ function collectOwnedMembers(
  memberName: string,
  ctx: RegistryContext,
 ): readonly SymbolDefinition[] {
-  // An owner's members are defs whose `ownerId === ownerDefId` and whose
-  // simple name matches `memberName`. We iterate `defs.byId` — O(D) per
-  // call today. A future by-owner index would make this O(K); tracked as
-  // a follow-up optimization before Ring 3 flips go production.
-  const out: SymbolDefinition[] = [];
-  for (const def of ctx.defs.byId.values()) {
-    if (def.ownerId !== ownerDefId) continue;
-    if (simpleNameOf(def) !== memberName) continue;
-    out.push(def);
-  }
-  return out;
-}
-
-function simpleNameOf(def: SymbolDefinition): string | undefined {
-  if (def.qualifiedName === undefined || def.qualifiedName.length === 0) return undefined;
-  const dot = def.qualifiedName.lastIndexOf('.');
-  return dot === -1 ? def.qualifiedName : def.qualifiedName.slice(dot + 1);
+  return ctx.ownedMembersByOwner(ownerDefId, memberName);
 }

 function recordTypeBindingHit(
@@ -423,13 +410,30 @@ function applyArityFilter(
  }

  let anyCompatible = false;
+  let anyUnknown = false;
  for (const state of perCandidate.values()) {
    const verdict = arityFn(callsite, state.def);
    state.signals.arityVerdict = verdict;
    if (verdict === 'compatible') anyCompatible = true;
+    else if (verdict === 'unknown') anyUnknown = true;
  }

-  if (!anyCompatible) return;
+  // When ALL candidates are 'incompatible' (none compatible, none unknown),
+  // the call is genuinely arity-broken — drop every candidate so the
+  // registry returns no resolution. This matches the PHP variadic case
+  // f(int $req, ...$rest) called with zero args: every candidate definitively
+  // rejects, and emitting an edge to a definitively-rejected callable is
+  // a false positive. When some candidates are 'unknown' (missing metadata),
+  // keep the set so downstream evidence can break the tie — that's the
+  // original safety-fallback behavior.
+  if (!anyCompatible) {
+    if (!anyUnknown) {
+      for (const defId of perCandidate.keys()) {
+        perCandidate.delete(defId);
+      }
+    }
+    return;
+  }

  // Filter: when at least one compatible candidate exists, drop incompatibles.
  for (const [defId, state] of perCandidate) {
@@ -11,6 +11,17 @@

 import type { NodeLabel } from '../graph/types.js';

+export interface ParameterTypeClass {
+  /** Normalized base type, matching the coarse `parameterTypes` vocabulary when known. */
+  base: string;
+  /** Top-level cv signal preserved from the original C++ parameter spelling. */
+  cv: 'none' | 'const' | 'volatile' | 'const volatile' | 'unknown';
+  /** Coarse value/reference/pointer shape. */
+  indirection: 'value' | 'lvalue-ref' | 'rvalue-ref' | 'pointer' | 'unknown';
+  /** Number of pointer markers when indirection is `pointer`; otherwise 0. */
+  pointerDepth: number;
+}
+
 export interface SymbolDefinition {
  nodeId: string;
  filePath: string;
@@ -26,10 +37,22 @@ export interface SymbolDefinition {
  /** Per-parameter type names for overload disambiguation (e.g. ['int', 'String']).
   *  Populated when parameter types are resolvable from AST (any typed language). */
  parameterTypes?: string[];
+  /** Additive per-parameter type shape sidecar for languages that need cv/ref/pointer distinctions.
+   *  Does not participate in graph node identity unless a resolver explicitly opts in. */
+  parameterTypeClasses?: ParameterTypeClass[];
  /** Raw return type text extracted from AST (e.g. 'User', 'Promise<User>') */
  returnType?: string;
  /** Declared type for non-callable symbols — fields/properties (e.g. 'Address', 'List<User>') */
  declaredType?: string;
+  /** Generic/template specialization arguments for class-like symbols (e.g. ['User'], ['T*']). */
+  templateArguments?: string[];
+  /** Per-language constraint payload for template / generic overloads
+   *  (e.g. C++ `enable_if_t<P, T>` predicate trees, C++20 `requires` clauses).
+   *  Opaque to shared code — the producing language adapter owns the shape
+   *  and is the only consumer. Read via the optional
+   *  `ScopeResolver.constraintCompatibility` hook during overload narrowing.
+   *  Absent for symbols that have no constraints (the common case). */
+  templateConstraints?: unknown;
  /** Links Method/Constructor/Property to owning Class/Struct/Trait nodeId */
  ownerId?: string;
 }
@@ -0,0 +1,13 @@
+/**
+ * Test-only helpers.
+ *
+ * Symbols here are reachable from `gitnexus-shared/test-helpers` so test
+ * suites can reset shared registries or exercise internal classifiers,
+ * but they are deliberately NOT re-exported from the main `gitnexus-shared`
+ * barrel. Production consumers should never import this module — calling
+ * `__resetBreakerRegistry__()` from a tool implementation would silently
+ * nuke every circuit breaker process-wide.
+ */
+
+export { __resetBreakerRegistry__ } from './integrations/circuit-breaker.js';
+export { classifyOutcome } from './integrations/resilient-fetch.js';
@@ -0,0 +1,71 @@
+import { test, expect, type Page } from '@playwright/test';
+
+const BACKEND_URL = 'http://localhost:4747';
+const REPO_NAME = 'mock-repo';
+
+async function mockBackend(page: Page) {
+  const repo = {
+    name: REPO_NAME,
+    path: '/tmp/mock-repo',
+    repoPath: '/tmp/mock-repo',
+    indexedAt: new Date().toISOString(),
+    stats: { files: 1, nodes: 0, edges: 0, processes: 0 },
+  };
+
+  await page.route(
+    (url) => url.origin === BACKEND_URL && url.pathname === '/api/repos',
+    (route) => route.fulfill({ json: [repo] }),
+  );
+  await page.route(
+    (url) => url.origin === BACKEND_URL && url.pathname === '/api/repo',
+    (route) => route.fulfill({ json: repo }),
+  );
+  await page.route(
+    (url) => url.origin === BACKEND_URL && url.pathname === '/api/graph',
+    (route) => route.fulfill({ json: { nodes: [], relationships: [] } }),
+  );
+  await page.route(
+    (url) => url.origin === BACKEND_URL && url.pathname === '/api/heartbeat',
+    (route) =>
+      route.fulfill({
+        status: 200,
+        headers: { 'Content-Type': 'text/event-stream', 'Cache-Control': 'no-cache' },
+        body: ':ok\n\n',
+      }),
+  );
+}
+
+async function enterExploringView(page: Page) {
+  await page.goto('/');
+  await page.locator('[data-testid="landing-repo-card"]').first().click();
+  await expect(page.getByTestId('language-switcher')).toBeVisible({ timeout: 20_000 });
+}
+
+test.describe('language switching', () => {
+  test('switches Header language, updates document metadata, and persists after reload', async ({
+    page,
+  }) => {
+    await mockBackend(page);
+    await page.goto('/');
+    await page.evaluate(() => window.localStorage.clear());
+
+    await enterExploringView(page);
+
+    await page.getByTestId('language-switcher').selectOption('zh-CN');
+
+    await expect(page.locator('html')).toHaveAttribute('lang', 'zh-CN');
+    await expect(page.getByText('觉得不错就点星')).toBeVisible();
+    await expect
+      .poll(() => page.evaluate(() => window.localStorage.getItem('gitnexus.lng')))
+      .toBe('zh-CN');
+
+    await page.reload();
+
+    await expect(page.getByTestId('language-switcher')).toHaveValue('zh-CN', { timeout: 20_000 });
+    await expect(page.locator('html')).toHaveAttribute('lang', 'zh-CN');
+    await expect(page.getByText('觉得不错就点星')).toBeVisible();
+
+    await page.getByTestId('language-switcher').selectOption('en');
+    await expect(page.locator('html')).toHaveAttribute('lang', 'en');
+  });
+});
@@ -18,40 +18,43 @@
    "test:e2e:report": "playwright show-report"
  },
  "dependencies": {
-    "gitnexus-shared": "file:../gitnexus-shared",
-    "@langchain/anthropic": "^1.3.27",
-    "@langchain/core": "^1.1.41",
-    "@langchain/google-genai": "^2.1.28",
+    "@langchain/anthropic": "^1.3.29",
+    "@langchain/core": "^1.1.44",
+    "@langchain/google-genai": "^2.1.30",
    "@langchain/langgraph": "^1.2.9",
    "@langchain/ollama": "^1.2.6",
    "@langchain/openai": "^1.4.5",
    "@sigma/edge-curve": "^3.1.0",
-    "@tailwindcss/vite": "^4.2.4",
-    "axios": "^1.13.2",
+    "@tailwindcss/vite": "^4.3.0",
+    "axios": "^1.16.0",
    "d3": "^7.9.0",
-    "dompurify": "^3.3.3",
+    "dompurify": "^3.4.3",
+    "gitnexus-shared": "file:../gitnexus-shared",
    "graphology": "^0.26.0",
    "graphology-indices": "^0.17.0",
    "graphology-layout-force": "^0.2.4",
    "graphology-layout-forceatlas2": "^0.10.1",
    "graphology-layout-noverlap": "^0.4.2",
    "graphology-utils": "^2.3.0",
-    "langchain": "^1.3.4",
+    "i18next": "^26.2.0",
+    "i18next-browser-languagedetector": "^8.2.1",
+    "langchain": "^1.3.5",
    "lru-cache": "^11.2.4",
-    "lucide-react": "^1.11.0",
-    "mermaid": "^11.14.0",
+    "lucide-react": "^1.14.0",
+    "mermaid": "^11.15.0",
    "mnemonist": "^0.39.0",
    "pandemonium": "^2.4.0",
    "react": "^19.2.5",
-    "react-dom": "^19.2.5",
+    "react-dom": "^19.2.6",
+    "react-i18next": "^17.0.8",
    "react-markdown": "^10.1.0",
-    "react-syntax-highlighter": "^16.1.0",
+    "react-syntax-highlighter": "^16.1.1",
    "react-zoom-pan-pinch": "^4.0.3",
    "remark-gfm": "^4.0.1",
    "sigma": "^3.0.2",
    "tailwindcss": "^4.2.4",
    "uuid": "^14.0.0",
-    "zod": "^3.25.76"
+    "zod": "^4.4.3"
  },
  "devDependencies": {
    "@babel/types": "^7.29.0",
@@ -59,19 +62,32 @@
    "@testing-library/jest-dom": "^6.9.1",
    "@testing-library/react": "^16.3.2",
    "@testing-library/user-event": "^14.6.1",
-    "@types/dompurify": "^3.0.5",
+    "@types/dompurify": "^3.2.0",
    "@types/node": "^25.6.0",
    "@types/react": "^19.2.14",
    "@types/react-dom": "^19.2.3",
    "@types/react-syntax-highlighter": "^15.5.13",
-    "@vercel/node": "^5.5.16",
+    "@vercel/node": "^5.8.2",
    "@vitejs/plugin-react": "^5.1.4",
    "@vitest/coverage-v8": "^4.1.5",
-    "jsdom": "^29.0.2",
+    "jsdom": "^29.1.1",
    "tree-sitter-wasms": "^0.1.13",
    "typescript": "^5.4.5",
-    "vite": "^8.0.10",
+    "vite": "^8.0.11",
    "vitest": "^4.1.5",
    "wait-on": "^9.0.5"
+  },
+  "overrides": {
+    "@vercel/static-config": {
+      "ajv": "8.18.0"
+    },
+    "@vercel/node": {
+      "path-to-regexp": "6.3.0",
+      "undici": "6.24.0"
+    },
+    "@vercel/python-analysis": {
+      "minimatch": "10.2.3",
+      "smol-toml": "1.6.1"
+    }
  }
 }
@@ -21,8 +21,11 @@ import {
  type BackendRepo,
 } from './services/backend-client';
 import { ERROR_RESET_DELAY_MS } from './config/ui-constants';
+import { formatBackendError } from './i18n/error-messages';
+import { useTranslation } from 'react-i18next';

 const AppContent = () => {
+  const { t } = useTranslation(['common', 'errors']);
  const {
    viewMode,
    setViewMode,
@@ -54,7 +57,6 @@ const AppContent = () => {
    async (result: ConnectResult): Promise<void> => {
      // Use the canonical repo name from the server response so all subsequent
      // backend calls (queries, search, grep, readFile) scope to this repo.
-      const repoName = result.repoInfo.name;
      const repoPath = result.repoInfo.repoPath ?? result.repoInfo.path;
      // Normalize both Windows (\) and Unix (/) path separators before splitting
      const projectName =
@@ -104,6 +106,11 @@ const AppContent = () => {

  // Auto-connect when ?server or ?project query param is present (bookmarkable shortcut)
  const autoConnectRan = useRef(false);
+  const tRef = useRef(t);
+  useEffect(() => {
+    tRef.current = t;
+  }, [t]);
+
  useEffect(() => {
    if (autoConnectRan.current) return;
    const params = new URLSearchParams(window.location.search);
@@ -116,8 +123,8 @@ const AppContent = () => {
    setProgress({
      phase: 'extracting',
      percent: 0,
-      message: 'Connecting to server...',
-      detail: 'Validating server',
+      message: tRef.current('common:progress.connecting'),
+      detail: tRef.current('common:progress.validatingServer'),
    });
    setViewMode('loading');

@@ -132,8 +139,8 @@ const AppContent = () => {
            setProgress({
              phase: 'extracting',
              percent: 5,
-              message: 'Connecting to server...',
-              detail: 'Validating server',
+              message: tRef.current('common:progress.connecting'),
+              detail: tRef.current('common:progress.validatingServer'),
            });
          } else if (phase === 'downloading') {
            const pct = total ? Math.round((downloaded / total) * 90) + 5 : 50;
@@ -141,15 +148,15 @@ const AppContent = () => {
            setProgress({
              phase: 'extracting',
              percent: pct,
-              message: 'Downloading graph...',
-              detail: `${mb} MB downloaded`,
+              message: tRef.current('common:progress.downloadingGraph'),
+              detail: tRef.current('common:progress.downloadedMb', { mb }),
            });
          } else if (phase === 'extracting') {
            setProgress({
              phase: 'extracting',
              percent: 97,
-              message: 'Processing...',
-              detail: 'Extracting file contents',
+              message: tRef.current('common:progress.processing'),
+              detail: tRef.current('common:progress.extractingFileContents'),
            });
          }
        },
@@ -173,8 +180,8 @@ const AppContent = () => {
        setProgress({
          phase: 'error',
          percent: 0,
-          message: 'Failed to connect to server',
-          detail: err instanceof Error ? err.message : 'Unknown error',
+          message: tRef.current('errors:connectFailed'),
+          detail: formatBackendError(err, tRef.current),
        });
        setTimeout(() => {
          setViewMode('onboarding');
@@ -299,7 +306,7 @@ const AppContent = () => {

      {serverDisconnected && (
        <div className="fixed bottom-12 left-1/2 z-50 -translate-x-1/2 rounded-lg border border-yellow-500/30 bg-yellow-900/80 px-4 py-2 text-sm text-yellow-200 shadow-lg backdrop-blur">
-          Server connection lost — reconnecting&hellip;
+          {t('errors:backend.reconnecting')}
        </div>
      )}

@@ -17,6 +17,7 @@

 import { Sparkles, Github } from '@/lib/lucide-icons';
 import { RepoAnalyzer } from './RepoAnalyzer';
+import { useTranslation } from 'react-i18next';

 interface AnalyzeOnboardingProps {
  /** Called when analysis finishes and the repo is ready to load. */
@@ -24,6 +25,8 @@ interface AnalyzeOnboardingProps {
 }

 export const AnalyzeOnboarding = ({ onComplete }: AnalyzeOnboardingProps) => {
+  const { t } = useTranslation('onboarding');
+
  return (
    <div className="relative animate-fade-in overflow-hidden rounded-3xl border border-border-default bg-surface p-7">
      {/* Ambient glows — mirrors OnboardingGuide aesthetic */}
@@ -47,11 +50,10 @@ export const AnalyzeOnboarding = ({ onComplete }: AnalyzeOnboardingProps) => {
          </div>

          <h2 className="text-lg leading-snug font-semibold text-text-primary">
-            Analyze your first repository
+            {t('analyzeFirst.title')}
          </h2>
          <p className="mx-auto mt-1.5 max-w-xs text-sm leading-relaxed text-text-secondary">
-            Paste a GitHub URL and GitNexus will clone it, parse the code, and build a live
-            knowledge graph — right in your browser.
+            {t('analyzeFirst.description')}
          </p>
        </div>
      </div>
@@ -63,7 +65,7 @@ export const AnalyzeOnboarding = ({ onComplete }: AnalyzeOnboardingProps) => {

      {/* Footer hint */}
      <p className="mt-5 text-center text-[11px] leading-relaxed text-text-muted">
-        Public repos only &middot; Cloned locally by the server &middot; No data leaves your machine
+        {t('analyzeFirst.footer')}
      </p>
    </div>
  );
@@ -1,33 +1,16 @@
 import { useState, useEffect } from 'react';
 import { X } from '@/lib/lucide-icons';
 import type { JobProgress as AnalyzeJobProgress } from '../services/backend-client';
+import { useTranslation } from 'react-i18next';
+import { translateAnalyzePhase } from '../i18n/progress';

 interface AnalyzeProgressProps {
  progress: AnalyzeJobProgress;
  onCancel: () => void;
 }

-const PHASE_LABELS: Record<string, string> = {
-  queued: 'Queued',
-  cloning: 'Cloning repository',
-  pulling: 'Pulling latest',
-  extracting: 'Scanning files',
-  structure: 'Building structure',
-  parsing: 'Parsing code',
-  imports: 'Resolving imports',
-  calls: 'Tracing calls',
-  heritage: 'Extracting inheritance',
-  communities: 'Detecting communities',
-  processes: 'Detecting processes',
-  complete: 'Pipeline complete',
-  lbug: 'Loading into database',
-  fts: 'Creating search indexes',
-  embeddings: 'Generating embeddings',
-  done: 'Done',
-  retrying: 'Retrying after crash',
-};
-
 export const AnalyzeProgress = ({ progress, onCancel }: AnalyzeProgressProps) => {
+  const { t } = useTranslation('common');
  const [startTime] = useState(() => Date.now());
  const [elapsed, setElapsed] = useState(0);

@@ -38,11 +21,11 @@ export const AnalyzeProgress = ({ progress, onCancel }: AnalyzeProgressProps) =>

  const formatElapsed = (ms: number) => {
    const s = Math.floor(ms / 1000);
-    if (s < 60) return `${s}s`;
-    return `${Math.floor(s / 60)}m ${s % 60}s`;
+    if (s < 60) return t('units.elapsedSeconds', { seconds: s });
+    return t('units.elapsedMinutesSeconds', { minutes: Math.floor(s / 60), seconds: s % 60 });
  };

-  const label = PHASE_LABELS[progress.phase] || progress.message || progress.phase;
+  const label = translateAnalyzePhase(progress.phase, progress.message, t);
  const pct = Math.max(0, Math.min(100, progress.percent));

  return (
@@ -69,7 +52,7 @@ export const AnalyzeProgress = ({ progress, onCancel }: AnalyzeProgressProps) =>
          className="flex items-center gap-1.5 rounded-lg bg-red-500/10 px-3 py-1.5 text-xs text-red-400 transition-all duration-200 hover:bg-red-500/20"
        >
          <X className="h-3.5 w-3.5" />
-          Cancel
+          {t('actions.cancel')}
        </button>
      </div>
    </div>
@@ -17,6 +17,7 @@ import { useAppState } from '../hooks/useAppState';
 import { type GraphNode, getSyntaxLanguageFromFilename } from 'gitnexus-shared';
 import { NODE_COLORS } from '../lib/constants';
 import { readFile, type ReadFileResult } from '../services/backend-client';
+import { useTranslation } from 'react-i18next';

 const getSyntaxLanguage = (filePath: string | undefined): string => {
  if (!filePath) return 'text';
@@ -46,6 +47,7 @@ export interface CodeReferencesPanelProps {
 }

 export const CodeReferencesPanel = ({ onFocusNode }: CodeReferencesPanelProps) => {
+  const { t } = useTranslation(['common', 'graph']);
  const {
    graph,
    selectedNode,
@@ -294,14 +296,14 @@ export const CodeReferencesPanel = ({ onFocusNode }: CodeReferencesPanelProps) =
        <button
          onClick={() => setIsCollapsed(false)}
          className="rounded p-2 text-text-secondary transition-colors hover:bg-cyan-500/10 hover:text-cyan-400"
-          title="Expand Code Panel"
+          title={t('graph:codePanel.expand')}
        >
          <PanelLeft className="h-5 w-5" />
        </button>
        <div className="my-1 h-px w-6 bg-border-subtle" />
        {showSelectedViewer && (
          <div className="rotate-90 text-[9px] font-medium tracking-wide whitespace-nowrap text-amber-400">
-            SELECTED
+            {t('graph:codePanel.selected')}
          </div>
        )}
        {showCitations && (
@@ -325,20 +327,22 @@ export const CodeReferencesPanel = ({ onFocusNode }: CodeReferencesPanelProps) =
      <div
        onMouseDown={startResize}
        className="absolute top-0 right-0 h-full w-2 cursor-col-resize bg-transparent transition-colors hover:bg-cyan-500/25"
-        title="Drag to resize"
+        title={t('graph:codePanel.dragResize')}
      />
      {/* Header */}
      <div className="flex items-center justify-between border-b border-border-subtle bg-gradient-to-r from-elevated/60 to-surface/60 px-3 py-2.5">
        <div className="flex items-center gap-2">
          <Code className="h-4 w-4 text-cyan-400" />
-          <span className="text-sm font-semibold text-text-primary">Code Inspector</span>
+          <span className="text-sm font-semibold text-text-primary">
+            {t('graph:codePanel.title')}
+          </span>
        </div>
        <div className="flex items-center gap-1.5">
          {showCitations && (
            <button
              onClick={() => clearCodeReferences()}
              className="rounded p-1.5 text-text-muted transition-colors hover:bg-red-500/10 hover:text-red-400"
-              title="Clear AI citations"
+              title={t('graph:codePanel.clearCitations')}
            >
              <Trash2 className="h-4 w-4" />
            </button>
@@ -346,7 +350,7 @@ export const CodeReferencesPanel = ({ onFocusNode }: CodeReferencesPanelProps) =
          <button
            onClick={() => setIsCollapsed(true)}
            className="rounded p-1.5 text-text-muted transition-colors hover:bg-hover hover:text-text-primary"
-            title="Collapse Panel"
+            title={t('common:actions.collapse')}
          >
            <PanelLeftClose className="h-4 w-4" />
          </button>
@@ -361,7 +365,7 @@ export const CodeReferencesPanel = ({ onFocusNode }: CodeReferencesPanelProps) =
              <div className="flex items-center gap-1.5 rounded-md border border-amber-500/25 bg-amber-500/15 px-2 py-0.5">
                <MousePointerClick className="h-3 w-3 text-amber-400" />
                <span className="text-[10px] font-semibold tracking-wide text-amber-300 uppercase">
-                  Selected
+                  {t('graph:codePanel.selected')}
                </span>
              </div>
              <FileCode className="ml-1 h-3.5 w-3.5 text-amber-400/70" />
@@ -372,16 +376,16 @@ export const CodeReferencesPanel = ({ onFocusNode }: CodeReferencesPanelProps) =
              <button
                onClick={() => setSelectedNode(null)}
                className="rounded p-1 text-text-muted transition-colors hover:bg-amber-500/10 hover:text-amber-400"
-                title="Clear selection"
+                title={t('graph:codePanel.clearSelection')}
              >
                <X className="h-4 w-4" />
              </button>
            </div>
-            <div ref={selectedViewerRef} className="scrollbar-thin min-h-0 flex-1 overflow-auto">
+            <div ref={selectedViewerRef} className="min-h-0 flex-1 scrollbar-thin overflow-auto">
              {isLoadingFile ? (
                <div className="flex items-center justify-center gap-2 py-8 text-text-muted">
                  <Loader2 className="h-4 w-4 animate-spin" />
-                  <span className="text-sm">Loading source...</span>
+                  <span className="text-sm">{t('graph:codePanel.loadingSource')}</span>
                </div>
              ) : selectedFileContent ? (
                <SyntaxHighlighter
@@ -420,12 +424,9 @@ export const CodeReferencesPanel = ({ onFocusNode }: CodeReferencesPanelProps) =
              ) : (
                <div className="px-3 py-3 text-sm text-text-muted">
                  {selectedIsFile ? (
-                    <>
-                      Code not available in memory for{' '}
-                      <span className="font-mono">{selectedFilePath}</span>
-                    </>
+                    <>{t('graph:codePanel.codeNotAvailable', { path: selectedFilePath })}</>
                  ) : (
-                    <>Select a file node to preview its contents.</>
+                    <>{t('graph:codePanel.selectFile')}</>
                  )}
                </div>
              )}
@@ -446,14 +447,14 @@ export const CodeReferencesPanel = ({ onFocusNode }: CodeReferencesPanelProps) =
              <div className="flex items-center gap-1.5 rounded-md border border-cyan-500/25 bg-cyan-500/15 px-2 py-0.5">
                <Sparkles className="h-3 w-3 text-cyan-400" />
                <span className="text-[10px] font-semibold tracking-wide text-cyan-300 uppercase">
-                  AI Citations
+                  {t('graph:codePanel.aiCitations')}
                </span>
              </div>
              <span className="ml-1 text-xs text-text-muted">
-                {aiReferences.length} reference{aiReferences.length !== 1 ? 's' : ''}
+                {t('graph:codePanel.references', { count: aiReferences.length })}
              </span>
            </div>
-            <div className="scrollbar-thin min-h-0 flex-1 space-y-3 overflow-y-auto p-3">
+            <div className="min-h-0 flex-1 scrollbar-thin space-y-3 overflow-y-auto p-3">
              {refsWithSnippets.map(
                ({ ref, content, start, highlightStart, highlightEnd, totalLines }) => {
                  const nodeColor = ref.label
@@ -483,9 +484,9 @@ export const CodeReferencesPanel = ({ onFocusNode }: CodeReferencesPanelProps) =
                        <span
                          className="mt-0.5 flex-shrink-0 rounded px-2 py-0.5 text-[10px] font-semibold tracking-wide uppercase"
                          style={{ backgroundColor: nodeColor, color: '#06060a' }}
-                          title={ref.label ?? 'Code'}
+                          title={ref.label ?? t('graph:codePanel.code')}
                        >
-                          {ref.label ?? 'Code'}
+                          {ref.label ?? t('graph:codePanel.code')}
                        </span>
                        <div className="min-w-0 flex-1">
                          <div className="truncate text-xs font-medium text-text-primary">
@@ -501,7 +502,10 @@ export const CodeReferencesPanel = ({ onFocusNode }: CodeReferencesPanelProps) =
                              </span>
                            )}
                            {totalLines > 0 && (
-                              <span className="text-text-muted"> • {totalLines} lines</span>
+                              <span className="text-text-muted">
+                                {' '}
+                                • {t('graph:codePanel.lines', { count: totalLines })}
+                              </span>
                            )}
                          </div>
                        </div>
@@ -518,7 +522,7 @@ export const CodeReferencesPanel = ({ onFocusNode }: CodeReferencesPanelProps) =
                                onFocusNode(nodeId);
                              }}
                              className="rounded p-1.5 text-text-muted transition-colors hover:bg-hover hover:text-text-primary"
-                              title="Focus in graph"
+                              title={t('common:actions.focusInGraph')}
                            >
                              <Target className="h-4 w-4" />
                            </button>
@@ -526,7 +530,7 @@ export const CodeReferencesPanel = ({ onFocusNode }: CodeReferencesPanelProps) =
                          <button
                            onClick={() => removeCodeReference(ref.id)}
                            className="rounded p-1.5 text-text-muted transition-colors hover:bg-hover hover:text-text-primary"
-                            title="Remove"
+                            title={t('common:actions.remove')}
                          >
                            <X className="h-4 w-4" />
                          </button>
@@ -572,8 +576,7 @@ export const CodeReferencesPanel = ({ onFocusNode }: CodeReferencesPanelProps) =
                          </SyntaxHighlighter>
                        ) : (
                          <div className="px-3 py-3 text-sm text-text-muted">
-                            Code not available in memory for{' '}
-                            <span className="font-mono">{ref.filePath}</span>
+                            {t('graph:codePanel.codeNotAvailable', { path: ref.filePath })}
                          </div>
                        )}
                      </div>
@@ -10,6 +10,8 @@ import { useBackend } from '../hooks/useBackend';
 import { OnboardingGuide } from './OnboardingGuide';
 import { AnalyzeOnboarding } from './AnalyzeOnboarding';
 import { RepoLanding } from './RepoLanding';
+import { useTranslation } from 'react-i18next';
+import { formatBackendError } from '../i18n/error-messages';

 interface DropZoneProps {
  onServerConnect?: (result: ConnectResult, serverUrl?: string) => void | Promise<void>;
@@ -60,6 +62,8 @@ function Crossfade({ activeKey, children }: { activeKey: string; children: React
 // ── Phase cards ─────────────────────────────────────────────────────────────

 function SuccessCard() {
+  const { t } = useTranslation('onboarding');
+
  return (
    <div
      className="relative overflow-hidden rounded-3xl border border-emerald-500/20 bg-surface p-7"
@@ -76,10 +80,10 @@ function SuccessCard() {
        </div>

        <h2 className="mb-2 text-center text-lg font-semibold text-emerald-400">
-          Server Connected
+          {t('success.title')}
        </h2>
        <p className="text-center text-sm leading-relaxed text-text-secondary">
-          Preparing your code knowledge graph...
+          {t('success.description')}
        </p>

        {/* Subtle progress hint */}
@@ -100,6 +104,8 @@ function SuccessCard() {
 }

 function LoadingCard({ message }: { message: string }) {
+  const { t } = useTranslation(['common', 'onboarding']);
+
  return (
    <div
      className="relative overflow-hidden rounded-3xl border border-accent/20 bg-surface p-7"
@@ -116,10 +122,10 @@ function LoadingCard({ message }: { message: string }) {
        </div>

        <h2 className="mb-2 text-center text-lg font-semibold text-text-primary">
-          {message || 'Connecting...'}
+          {message || t('common:progress.connectingShort')}
        </h2>
        <p className="text-center text-sm leading-relaxed text-text-secondary">
-          This may take a moment for large repositories
+          {t('onboarding:loading.largeRepoHint')}
        </p>

        {/* Decorative sparkle */}
@@ -134,6 +140,7 @@ function LoadingCard({ message }: { message: string }) {
 // ── DropZone ─────────────────────────────────────────────────────────────────

 export const DropZone = ({ onServerConnect }: DropZoneProps) => {
+  const { t } = useTranslation(['common', 'errors']);
  const [error, setError] = useState<string | null>(null);

  // Backend polling for server detection
@@ -163,7 +170,7 @@ export const DropZone = ({ onServerConnect }: DropZoneProps) => {
  // appropriate screen (landing with repo cards, or analyze for zero repos).
  const handleAutoConnect = async () => {
    setPhase('loading');
-    setLoadingMessage('Connecting...');
+    setLoadingMessage(t('common:progress.connectingShort'));
    setError(null);

    try {
@@ -179,8 +186,7 @@ export const DropZone = ({ onServerConnect }: DropZoneProps) => {
      setPhase('landing');
    } catch (err) {
      if ((err as Error).name === 'AbortError') return;
-      const message = err instanceof Error ? err.message : 'Failed to connect';
-      setError(message);
+      setError(formatBackendError(err, t));
      setPhase('onboarding');
    }
  };
@@ -193,7 +199,7 @@ export const DropZone = ({ onServerConnect }: DropZoneProps) => {
  const connectToRepo = (repoName: string) => {
    autoConnectRan.current = true;
    setPhase('loading');
-    setLoadingMessage('Loading graph...');
+    setLoadingMessage(t('common:progress.loadingGraph'));
    setError(null);

    (async () => {
@@ -204,13 +210,17 @@ export const DropZone = ({ onServerConnect }: DropZoneProps) => {
          detectedBackendUrl,
          (p, downloaded, total) => {
            if (p === 'validating') {
-              setLoadingMessage('Validating server...');
+              setLoadingMessage(t('common:progress.validatingServerEllipsis'));
            } else if (p === 'downloading') {
              const pct = total ? Math.round((downloaded / total) * 100) : null;
              const mb = (downloaded / (1024 * 1024)).toFixed(1);
-              setLoadingMessage(pct ? `Downloading graph... ${pct}%` : `Downloading... ${mb} MB`);
+              setLoadingMessage(
+                pct
+                  ? t('common:progress.downloadingWithPercent', { percent: pct })
+                  : t('common:progress.downloadingMb', { mb }),
+              );
            } else if (p === 'extracting') {
-              setLoadingMessage('Processing graph...');
+              setLoadingMessage(t('common:progress.processingGraph'));
            }
          },
          abortController.signal,
@@ -221,7 +231,7 @@ export const DropZone = ({ onServerConnect }: DropZoneProps) => {
        }
      } catch (err) {
        if ((err as Error).name === 'AbortError') return;
-        setError(err instanceof Error ? err.message : 'Failed to load graph');
+        setError(formatBackendError(err, t));
        setPhase(detectedRepos.length > 0 ? 'landing' : 'analyze');
      } finally {
        abortControllerRef.current = null;
@@ -2,12 +2,14 @@ import { Brain, Loader2, Check, AlertCircle, Zap } from '@/lib/lucide-icons';
 import { useAppState } from '../hooks/useAppState';
 import { useState } from 'react';
 import { WebGPUFallbackDialog } from './WebGPUFallbackDialog';
+import { useTranslation } from 'react-i18next';

 /**
 * Embedding status indicator and trigger button
 * Shows in header when graph is loaded
 */
 export const EmbeddingStatus = () => {
+  const { t } = useTranslation('graph');
  const { embeddingStatus, embeddingProgress, startEmbeddings, graph, viewMode, serverBaseUrl } =
    useAppState();

@@ -63,10 +65,10 @@ export const EmbeddingStatus = () => {
          <button
            onClick={() => handleStartEmbeddings()}
            className="group flex items-center gap-2 rounded-lg border border-border-subtle bg-surface px-3 py-1.5 text-sm text-text-secondary transition-all hover:border-accent/50 hover:bg-hover hover:text-text-primary"
-            title="Generate embeddings for semantic search"
+            title={t('embedding.generateTitle')}
          >
            <Brain className="h-4 w-4 text-node-interface transition-colors group-hover:text-accent" />
-            <span className="hidden sm:inline">Enable Semantic Search</span>
+            <span className="hidden sm:inline">{t('embedding.enable')}</span>
            <Zap className="h-3 w-3 text-text-muted" />
          </button>
        </div>
@@ -83,7 +85,7 @@ export const EmbeddingStatus = () => {
        <div className="flex items-center gap-2.5 rounded-lg border border-accent/30 bg-surface px-3 py-1.5 text-sm">
          <Loader2 className="h-4 w-4 animate-spin text-accent" />
          <div className="flex flex-col gap-0.5">
-            <span className="text-xs text-text-secondary">Loading AI model...</span>
+            <span className="text-xs text-text-secondary">{t('embedding.loadingModel')}</span>
            <div className="h-1 w-24 overflow-hidden rounded-full bg-elevated">
              <div
                className="h-full rounded-full bg-gradient-to-r from-accent to-node-interface transition-all duration-300"
@@ -108,7 +110,7 @@ export const EmbeddingStatus = () => {
        <Loader2 className="h-4 w-4 animate-spin text-node-function" />
        <div className="flex flex-col gap-0.5">
          <span className="text-xs text-text-secondary">
-            Embedding {processed}/{total} nodes
+            {t('embedding.embeddingNodes', { processed, total })}
          </span>
          <div className="h-1 w-24 overflow-hidden rounded-full bg-elevated">
            <div
@@ -126,7 +128,7 @@ export const EmbeddingStatus = () => {
    return (
      <div className="flex items-center gap-2 rounded-lg border border-node-interface/30 bg-surface px-3 py-1.5 text-sm text-text-secondary">
        <Loader2 className="h-4 w-4 animate-spin text-node-interface" />
-        <span className="text-xs">Creating vector index...</span>
+        <span className="text-xs">{t('embedding.creatingIndex')}</span>
      </div>
    );
  }
@@ -136,10 +138,10 @@ export const EmbeddingStatus = () => {
    return (
      <div
        className="flex items-center gap-2 rounded-lg border border-node-function/30 bg-node-function/10 px-3 py-1.5 text-sm text-node-function"
-        title="Semantic search is ready! Use natural language in the AI chat."
+        title={t('embedding.readyTitle')}
      >
        <Check className="h-4 w-4" />
-        <span className="text-xs font-medium">Semantic Ready</span>
+        <span className="text-xs font-medium">{t('embedding.ready')}</span>
      </div>
    );
  }
@@ -151,10 +153,10 @@ export const EmbeddingStatus = () => {
        <button
          onClick={() => handleStartEmbeddings()}
          className="flex items-center gap-2 rounded-lg border border-red-500/30 bg-red-500/10 px-3 py-1.5 text-sm text-red-400 transition-colors hover:bg-red-500/20"
-          title="Embedding failed. Click to retry."
+          title={t('embedding.errorTitle')}
        >
          <AlertCircle className="h-4 w-4" />
-          <span className="text-xs">Failed - Retry</span>
+          <span className="text-xs">{t('embedding.failedRetry')}</span>
        </button>
        {fallbackDialog}
      </>
@@ -19,6 +19,7 @@ import {
  Type,
 } from '@/lib/lucide-icons';
 import { useAppState } from '../hooks/useAppState';
+import { useTranslation } from 'react-i18next';
 import { FILTERABLE_LABELS, NODE_COLORS, ALL_EDGE_TYPES, EDGE_INFO } from '../lib/constants';
 import type { GraphNode, NodeLabel } from 'gitnexus-shared';

@@ -211,6 +212,7 @@ interface FileTreePanelProps {
 }

 export const FileTreePanel = ({ onFocusNode }: FileTreePanelProps) => {
+  const { t } = useTranslation(['common', 'graph']);
  const {
    graph,
    visibleLabels,
@@ -303,7 +305,7 @@ export const FileTreePanel = ({ onFocusNode }: FileTreePanelProps) => {
        <button
          onClick={() => setIsCollapsed(false)}
          className="rounded p-2 text-text-secondary transition-colors hover:bg-hover hover:text-text-primary"
-          title="Expand Panel"
+          title={t('graph:fileTree.expandPanel')}
        >
          <PanelLeft className="h-5 w-5" />
        </button>
@@ -314,7 +316,7 @@ export const FileTreePanel = ({ onFocusNode }: FileTreePanelProps) => {
            setActiveTab('files');
          }}
          className={`rounded p-2 transition-colors ${activeTab === 'files' ? 'bg-accent/10 text-accent' : 'text-text-secondary hover:bg-hover hover:text-text-primary'}`}
-          title="File Explorer"
+          title={t('graph:fileTree.fileExplorer')}
        >
          <Folder className="h-5 w-5" />
        </button>
@@ -324,7 +326,7 @@ export const FileTreePanel = ({ onFocusNode }: FileTreePanelProps) => {
            setActiveTab('filters');
          }}
          className={`rounded p-2 transition-colors ${activeTab === 'filters' ? 'bg-accent/10 text-accent' : 'text-text-secondary hover:bg-hover hover:text-text-primary'}`}
-          title="Filters"
+          title={t('graph:fileTree.filters')}
        >
          <Filter className="h-5 w-5" />
        </button>
@@ -345,7 +347,7 @@ export const FileTreePanel = ({ onFocusNode }: FileTreePanelProps) => {
                : 'text-text-secondary hover:bg-hover hover:text-text-primary'
            }`}
          >
-            Explorer
+            {t('graph:fileTree.explorer')}
          </button>
          <button
            onClick={() => setActiveTab('filters')}
@@ -355,13 +357,13 @@ export const FileTreePanel = ({ onFocusNode }: FileTreePanelProps) => {
                : 'text-text-secondary hover:bg-hover hover:text-text-primary'
            }`}
          >
-            Filters
+            {t('graph:fileTree.filters')}
          </button>
        </div>
        <button
          onClick={() => setIsCollapsed(true)}
          className="rounded p-1 text-text-muted transition-colors hover:bg-hover hover:text-text-primary"
-          title="Collapse Panel"
+          title={t('graph:fileTree.collapsePanel')}
        >
          <PanelLeftClose className="h-4 w-4" />
        </button>
@@ -375,7 +377,7 @@ export const FileTreePanel = ({ onFocusNode }: FileTreePanelProps) => {
              <Search className="absolute top-1/2 left-2.5 h-3.5 w-3.5 -translate-y-1/2 text-text-muted" />
              <input
                type="text"
-                placeholder="Search files..."
+                placeholder={t('graph:fileTree.searchFiles')}
                value={searchQuery}
                onChange={(e) => setSearchQuery(e.target.value)}
                className="w-full rounded border border-border-subtle bg-elevated py-1.5 pr-3 pl-8 text-xs text-text-primary placeholder:text-text-muted focus:border-accent focus:outline-none"
@@ -384,9 +386,11 @@ export const FileTreePanel = ({ onFocusNode }: FileTreePanelProps) => {
          </div>

          {/* File tree */}
-          <div className="scrollbar-thin flex-1 overflow-y-auto py-2">
+          <div className="flex-1 scrollbar-thin overflow-y-auto py-2">
            {fileTree.length === 0 ? (
-              <div className="px-3 py-4 text-center text-xs text-text-muted">No files loaded</div>
+              <div className="px-3 py-4 text-center text-xs text-text-muted">
+                {t('graph:fileTree.noFilesLoaded')}
+              </div>
            ) : (
              fileTree.map((node) => (
                <TreeItem
@@ -406,14 +410,12 @@ export const FileTreePanel = ({ onFocusNode }: FileTreePanelProps) => {
      )}

      {activeTab === 'filters' && (
-        <div className="scrollbar-thin flex-1 overflow-y-auto p-3">
+        <div className="flex-1 scrollbar-thin overflow-y-auto p-3">
          <div className="mb-3">
            <h3 className="mb-2 text-xs font-medium tracking-wide text-text-secondary uppercase">
-              Node Types
+              {t('graph:fileTree.nodeTypes')}
            </h3>
-            <p className="mb-3 text-[11px] text-text-muted">
-              Toggle visibility of node types in the graph
-            </p>
+            <p className="mb-3 text-[11px] text-text-muted">{t('graph:fileTree.nodeTypesDesc')}</p>
          </div>

          <div className="flex flex-col gap-1">
@@ -449,11 +451,9 @@ export const FileTreePanel = ({ onFocusNode }: FileTreePanelProps) => {
          {/* Edge Type Toggles */}
          <div className="mt-6 border-t border-border-subtle pt-4">
            <h3 className="mb-2 text-xs font-medium tracking-wide text-text-secondary uppercase">
-              Edge Types
+              {t('graph:fileTree.edgeTypes')}
            </h3>
-            <p className="mb-3 text-[11px] text-text-muted">
-              Toggle visibility of relationship types
-            </p>
+            <p className="mb-3 text-[11px] text-text-muted">{t('graph:fileTree.edgeTypesDesc')}</p>

            <div className="flex flex-col gap-1">
              {ALL_EDGE_TYPES.map((edgeType) => {
@@ -488,19 +488,17 @@ export const FileTreePanel = ({ onFocusNode }: FileTreePanelProps) => {
          <div className="mt-6 border-t border-border-subtle pt-4">
            <h3 className="mb-2 text-xs font-medium tracking-wide text-text-secondary uppercase">
              <Target className="mr-1.5 inline h-3 w-3" />
-              Focus Depth
+              {t('graph:fileTree.focusDepth')}
            </h3>
-            <p className="mb-3 text-[11px] text-text-muted">
-              Show nodes within N hops of selection
-            </p>
+            <p className="mb-3 text-[11px] text-text-muted">{t('graph:fileTree.focusDepthDesc')}</p>

            <div className="flex flex-wrap gap-1.5">
              {[
-                { value: null, label: 'All' },
-                { value: 1, label: '1 hop' },
-                { value: 2, label: '2 hops' },
-                { value: 3, label: '3 hops' },
-                { value: 5, label: '5 hops' },
+                { value: null, label: t('graph:fileTree.all') },
+                { value: 1, label: t('graph:fileTree.hops', { count: 1 }) },
+                { value: 2, label: t('graph:fileTree.hops', { count: 2 }) },
+                { value: 3, label: t('graph:fileTree.hops', { count: 3 }) },
+                { value: 5, label: t('graph:fileTree.hops', { count: 5 }) },
              ].map(({ value, label }) => (
                <button
                  key={label}
@@ -517,14 +515,16 @@ export const FileTreePanel = ({ onFocusNode }: FileTreePanelProps) => {
            </div>

            {depthFilter !== null && !selectedNode && (
-              <p className="mt-2 text-[10px] text-amber-400">Select a node to apply depth filter</p>
+              <p className="mt-2 text-[10px] text-amber-400">
+                {t('graph:fileTree.selectNodeDepth')}
+              </p>
            )}
          </div>

          {/* Legend */}
          <div className="mt-6 border-t border-border-subtle pt-4">
            <h3 className="mb-3 text-xs font-medium tracking-wide text-text-secondary uppercase">
-              Color Legend
+              {t('graph:fileTree.colorLegend')}
            </h3>
            <div className="grid grid-cols-2 gap-2">
              {(
@@ -558,8 +558,8 @@ export const FileTreePanel = ({ onFocusNode }: FileTreePanelProps) => {
      {graph && (
        <div className="border-t border-border-subtle bg-elevated/50 px-3 py-2">
          <div className="flex items-center justify-between text-[10px] text-text-muted">
-            <span>{graph.nodes.length} nodes</span>
-            <span>{graph.relationships.length} edges</span>
+            <span>{t('common:counts.nodes', { count: graph.nodes.length })}</span>
+            <span>{t('common:counts.edges', { count: graph.relationships.length })}</span>
          </div>
        </div>
      )}
@@ -21,12 +21,14 @@ import {
 import type { GraphNode } from 'gitnexus-shared';
 import { QueryFAB } from './QueryFAB';
 import Graph from 'graphology';
+import { useTranslation } from 'react-i18next';

 export interface GraphCanvasHandle {
  focusNode: (nodeId: string) => void;
 }

 export const GraphCanvas = forwardRef<GraphCanvasHandle>((_, ref) => {
+  const { t } = useTranslation('graph');
  const {
    graph,
    setSelectedNode,
@@ -268,7 +270,7 @@ export const GraphCanvas = forwardRef<GraphCanvasHandle>((_, ref) => {
            onClick={handleClearSelection}
            className="ml-2 rounded px-2 py-0.5 text-xs text-text-secondary transition-colors hover:bg-white/10 hover:text-text-primary"
          >
-            Clear
+            {t('canvas.clear')}
          </button>
        </div>
      )}
@@ -278,21 +280,21 @@ export const GraphCanvas = forwardRef<GraphCanvasHandle>((_, ref) => {
        <button
          onClick={zoomIn}
          className="flex h-9 w-9 items-center justify-center rounded-md border border-border-subtle bg-elevated text-text-secondary transition-colors hover:bg-hover hover:text-text-primary"
-          title="Zoom In"
+          title={t('canvas.zoomIn')}
        >
          <ZoomIn className="h-4 w-4" />
        </button>
        <button
          onClick={zoomOut}
          className="flex h-9 w-9 items-center justify-center rounded-md border border-border-subtle bg-elevated text-text-secondary transition-colors hover:bg-hover hover:text-text-primary"
-          title="Zoom Out"
+          title={t('canvas.zoomOut')}
        >
          <ZoomOut className="h-4 w-4" />
        </button>
        <button
          onClick={resetZoom}
          className="flex h-9 w-9 items-center justify-center rounded-md border border-border-subtle bg-elevated text-text-secondary transition-colors hover:bg-hover hover:text-text-primary"
-          title="Fit to Screen"
+          title={t('canvas.fit')}
        >
          <Maximize2 className="h-4 w-4" />
        </button>
@@ -305,7 +307,7 @@ export const GraphCanvas = forwardRef<GraphCanvasHandle>((_, ref) => {
          <button
            onClick={handleFocusSelected}
            className="flex h-9 w-9 items-center justify-center rounded-md border border-accent/30 bg-accent/20 text-accent transition-colors hover:bg-accent/30"
-            title="Focus on Selected Node"
+            title={t('canvas.focusSelected')}
          >
            <Focus className="h-4 w-4" />
          </button>
@@ -316,7 +318,7 @@ export const GraphCanvas = forwardRef<GraphCanvasHandle>((_, ref) => {
          <button
            onClick={handleClearSelection}
            className="flex h-9 w-9 items-center justify-center rounded-md border border-border-subtle bg-elevated text-text-secondary transition-colors hover:bg-hover hover:text-text-primary"
-            title="Clear Selection"
+            title={t('canvas.clearSelection')}
          >
            <RotateCcw className="h-4 w-4" />
          </button>
@@ -333,7 +335,7 @@ export const GraphCanvas = forwardRef<GraphCanvasHandle>((_, ref) => {
              ? 'animate-pulse border-accent bg-accent text-white shadow-glow'
              : 'border-border-subtle bg-elevated text-text-secondary hover:bg-hover hover:text-text-primary'
          } `}
-          title={isLayoutRunning ? 'Stop Layout' : 'Run Layout Again'}
+          title={isLayoutRunning ? t('canvas.stopLayout') : t('canvas.runLayout')}
        >
          {isLayoutRunning ? <Pause className="h-4 w-4" /> : <Play className="h-4 w-4" />}
        </button>
@@ -343,7 +345,9 @@ export const GraphCanvas = forwardRef<GraphCanvasHandle>((_, ref) => {
      {isLayoutRunning && (
        <div className="absolute bottom-4 left-1/2 z-10 flex -translate-x-1/2 animate-fade-in items-center gap-2 rounded-full border border-emerald-500/30 bg-emerald-500/20 px-3 py-1.5 backdrop-blur-sm">
          <div className="h-2 w-2 animate-ping rounded-full bg-emerald-400" />
-          <span className="text-xs font-medium text-emerald-400">Layout optimizing...</span>
+          <span className="text-xs font-medium text-emerald-400">
+            {t('canvas.layoutOptimizing')}
+          </span>
        </div>
      )}

@@ -359,7 +363,9 @@ export const GraphCanvas = forwardRef<GraphCanvasHandle>((_, ref) => {
              ? 'flex h-10 w-10 items-center justify-center rounded-lg border border-cyan-400/40 bg-cyan-500/15 text-cyan-200 transition-colors hover:border-cyan-300/60 hover:bg-cyan-500/20'
              : 'flex h-10 w-10 items-center justify-center rounded-lg border border-border-subtle bg-elevated text-text-muted transition-colors hover:bg-hover hover:text-text-primary'
          }
-          title={isAIHighlightsEnabled ? 'Turn off all highlights' : 'Turn on AI highlights'}
+          title={
+            isAIHighlightsEnabled ? t('canvas.turnOffHighlights') : t('canvas.turnOnHighlights')
+          }
          data-testid="ai-highlights-toggle"
        >
          {isAIHighlightsEnabled ? (
@@ -21,9 +21,12 @@ import {
  type JobProgress,
 } from '../services/backend-client';
 import { useState, useMemo, useRef, useEffect } from 'react';
+import { useTranslation } from 'react-i18next';
 import { GraphNode } from 'gitnexus-shared';
 import { EmbeddingStatus } from './EmbeddingStatus';
 import { RepoAnalyzer } from './RepoAnalyzer';
+import { LanguageSwitcher } from './LanguageSwitcher';
+import { translateProgressMessage } from '../i18n/progress';

 // Color mapping for node types in search results
 const NODE_TYPE_COLORS: Record<string, string> = {
@@ -55,6 +58,7 @@ export const Header = ({
  onAnalyzeComplete,
  onReposChanged,
 }: HeaderProps) => {
+  const { t } = useTranslation(['common', 'header']);
  const {
    projectName,
    graph,
@@ -208,7 +212,7 @@ export const Header = ({
                    {availableRepos.length > 0 && (
                      <div>
                        <div className="px-3 pt-2.5 pb-1.5 text-[10px] font-medium tracking-wider text-text-muted uppercase">
-                          Repositories
+                          {t('header:repositories')}
                        </div>
                        {availableRepos.map((repo) => (
                          <div
@@ -232,7 +236,7 @@ export const Header = ({
                              </span>
                              {repo.name === projectName && (
                                <span className="shrink-0 font-mono text-[10px] text-accent">
-                                  active
+                                  {t('header:active')}
                                </span>
                              )}
                            </button>
@@ -245,7 +249,7 @@ export const Header = ({
                                setReanalyzeProgress({
                                  phase: 'queued',
                                  percent: 0,
-                                  message: 'Starting...',
+                                  message: t('common:progress.starting'),
                                });
                                try {
                                  const { jobId } = await startAnalyze({
@@ -282,8 +286,8 @@ export const Header = ({
                              }`}
                              title={
                                reanalyzing === repo.name
-                                  ? 'Re-analyzing...'
-                                  : `Re-analyze ${repo.name}`
+                                  ? t('header:reanalyzing')
+                                  : t('header:reanalyzeRepo', { repoName: repo.name })
                              }
                            >
                              <RefreshCw
@@ -317,7 +321,7 @@ export const Header = ({
                                }
                              }}
                              className="cursor-pointer rounded p-1 text-text-muted/0 transition-all group-hover:text-text-muted hover:!text-red-400"
-                              title={`Delete ${repo.name}`}
+                              title={t('header:deleteRepo', { repoName: repo.name })}
                            >
                              <Trash2 className="h-3.5 w-3.5" />
                            </button>
@@ -332,7 +336,10 @@ export const Header = ({
                        <div className="mb-1.5 flex items-center gap-2">
                          <Loader2 className="h-3 w-3 shrink-0 animate-spin text-accent" />
                          <span className="truncate text-xs text-text-secondary">
-                            Re-analyzing {reanalyzing}: {reanalyzeProgress.message}
+                            {t('header:reanalyzingRepo', {
+                              repoName: reanalyzing,
+                              message: translateProgressMessage(reanalyzeProgress.message, t),
+                            })}
                          </span>
                        </div>
                        <div className="h-1 overflow-hidden rounded-full bg-elevated">
@@ -359,7 +366,7 @@ export const Header = ({
                      >
                        <Sparkles className="h-3.5 w-3.5 shrink-0 text-accent" />
                        <span className="text-sm text-text-secondary">
-                          Analyze a new repository...
+                          {t('header:analyzeNew')}
                        </span>
                      </button>
                    </div>
@@ -378,7 +385,7 @@ export const Header = ({
          <input
            ref={inputRef}
            type="text"
-            placeholder="Search nodes..."
+            placeholder={t('header:searchNodes')}
            value={searchQuery}
            onChange={(e) => {
              setSearchQuery(e.target.value);
@@ -399,7 +406,7 @@ export const Header = ({
          <div className="absolute top-full right-0 left-0 z-50 mt-1 overflow-hidden rounded-xl border border-border-subtle bg-surface shadow-xl">
            {searchResults.length === 0 ? (
              <div className="px-4 py-3 text-sm text-text-muted">
-                No nodes found for &ldquo;{searchQuery}&rdquo;
+                {t('header:noNodesFound', { query: searchQuery })}
              </div>
            ) : (
              <div className="max-h-80 overflow-y-auto">
@@ -441,7 +448,7 @@ export const Header = ({
          className="group flex items-center gap-2 rounded-lg bg-gradient-to-r from-purple-600 to-pink-600 px-3.5 py-2 text-sm font-medium text-white shadow-lg transition-all duration-200 hover:-translate-y-0.5 hover:from-purple-500 hover:to-pink-500 hover:shadow-xl"
        >
          <Github className="h-4 w-4" />
-          <span className="hidden sm:inline">Star if cool</span>
+          <span className="hidden sm:inline">{t('header:starIfCool')}</span>
          <Star className="h-3.5 w-3.5 transition-all group-hover:fill-yellow-300 group-hover:text-yellow-300" />
          <span className="hidden sm:inline">✨</span>
        </a>
@@ -449,24 +456,26 @@ export const Header = ({
        {/* Stats */}
        {graph && (
          <div className="mr-2 flex items-center gap-4 text-xs text-text-muted">
-            <span>{nodeCount} nodes</span>
-            <span>{edgeCount} edges</span>
+            <span>{t('common:counts.nodes', { count: nodeCount })}</span>
+            <span>{t('common:counts.edges', { count: edgeCount })}</span>
          </div>
        )}

        {/* Embedding Status */}
        <EmbeddingStatus />

+        <LanguageSwitcher />
+
        {/* Icon buttons */}
        <button
          onClick={() => setSettingsPanelOpen(true)}
          className="flex h-9 w-9 cursor-pointer items-center justify-center rounded-md text-text-secondary transition-colors hover:bg-hover hover:text-text-primary"
-          title="AI Settings"
+          title={t('header:aiSettings')}
        >
          <Settings className="h-4.5 w-4.5" />
        </button>
        <button
-          title="Help"
+          title={t('header:help')}
          onClick={() => setHelpDialogBoxOpen(true)}
          className="flex h-9 w-9 cursor-pointer items-center justify-center rounded-md text-text-secondary transition-colors hover:bg-hover hover:text-text-primary"
        >
@@ -483,7 +492,7 @@ export const Header = ({
          } `}
        >
          <Sparkles className="h-4 w-4" />
-          <span>Nexus AI</span>
+          <span>{t('common:app.nexusAI')}</span>
        </button>
      </div>
    </header>
@@ -1,5 +1,6 @@
 import React, { useState } from 'react';
 import { X, GitBranch, Search, Filter, Zap, Keyboard, BarChart2, HelpCircle } from 'lucide-react';
+import { useTranslation } from 'react-i18next';

 interface HelpPanelProps {
  isOpen: boolean;
@@ -12,34 +13,33 @@ type TabId = 'overview' | 'graph' | 'search' | 'ai' | 'shortcuts' | 'status';

 interface Tab {
  id: TabId;
-  label: string;
  icon: React.ReactNode;
 }

 const tabs: Tab[] = [
-  { id: 'overview', label: 'Overview', icon: <HelpCircle className="h-4 w-4" /> },
-  { id: 'graph', label: 'Graph & nodes', icon: <GitBranch className="h-4 w-4" /> },
-  { id: 'search', label: 'Search & filter', icon: <Search className="h-4 w-4" /> },
-  { id: 'ai', label: 'Nexus AI', icon: <Zap className="h-4 w-4" /> },
-  { id: 'shortcuts', label: 'Shortcuts', icon: <Keyboard className="h-4 w-4" /> },
-  { id: 'status', label: 'Status bar', icon: <BarChart2 className="h-4 w-4" /> },
+  { id: 'overview', icon: <HelpCircle className="h-4 w-4" /> },
+  { id: 'graph', icon: <GitBranch className="h-4 w-4" /> },
+  { id: 'search', icon: <Search className="h-4 w-4" /> },
+  { id: 'ai', icon: <Zap className="h-4 w-4" /> },
+  { id: 'shortcuts', icon: <Keyboard className="h-4 w-4" /> },
+  { id: 'status', icon: <BarChart2 className="h-4 w-4" /> },
 ];

 const shortcuts = [
-  { label: 'Search nodes', mac: '⌘ K', win: 'Ctrl K' },
-  { label: 'Deselect / close', mac: 'Esc', win: 'Esc' },
+  { labelKey: 'shortcuts.searchNodes', mac: '⌘ K', win: 'Ctrl K' },
+  { labelKey: 'shortcuts.deselectClose', mac: 'Esc', win: 'Esc' },
 ];

 const nodeColors = [
-  { color: '#10b981', label: 'Function', desc: 'Function declarations' },
-  { color: '#3b82f6', label: 'File', desc: 'Source files' },
-  { color: '#f59e0b', label: 'Class', desc: 'Class declarations' },
-  { color: '#14b8a6', label: 'Method', desc: 'Class methods' },
-  { color: '#ec4899', label: 'Interface', desc: 'TypeScript interfaces' },
-  { color: '#6366f1', label: 'Folder', desc: 'Directory nodes' },
+  { color: '#10b981', labelKey: 'nodeTypes.function', descKey: 'nodeTypes.functionDesc' },
+  { color: '#3b82f6', labelKey: 'nodeTypes.file', descKey: 'nodeTypes.fileDesc' },
+  { color: '#f59e0b', labelKey: 'nodeTypes.class', descKey: 'nodeTypes.classDesc' },
+  { color: '#14b8a6', labelKey: 'nodeTypes.method', descKey: 'nodeTypes.methodDesc' },
+  { color: '#ec4899', labelKey: 'nodeTypes.interface', descKey: 'nodeTypes.interfaceDesc' },
+  { color: '#6366f1', labelKey: 'nodeTypes.folder', descKey: 'nodeTypes.folderDesc' },
 ];

-const getStatusItems = (nodeCount: number, edgeCount: number) => [
+const getStatusItems = (t: (key: string) => string, nodeCount: number, edgeCount: number) => [
  {
    badge: (
      <span
@@ -53,8 +53,8 @@ const getStatusItems = (nodeCount: number, edgeCount: number) => [
        }}
      />
    ),
-    title: 'Ready',
-    desc: 'Graph is fully loaded and interactive',
+    title: t('status.ready'),
+    desc: t('status.readyDesc'),
  },
  {
    badge: (
@@ -62,8 +62,8 @@ const getStatusItems = (nodeCount: number, edgeCount: number) => [
        {nodeCount}
      </span>
    ),
-    title: 'Nodes count',
-    desc: 'Total files and symbols in the graph',
+    title: t('status.nodesCount'),
+    desc: t('status.nodesCountDesc'),
  },
  {
    badge: (
@@ -71,8 +71,8 @@ const getStatusItems = (nodeCount: number, edgeCount: number) => [
        {edgeCount}
      </span>
    ),
-    title: 'Edges count',
-    desc: 'Import / dependency connections',
+    title: t('status.edgesCount'),
+    desc: t('status.edgesCountDesc'),
  },
  {
    badge: (
@@ -85,11 +85,11 @@ const getStatusItems = (nodeCount: number, edgeCount: number) => [
          whiteSpace: 'nowrap',
        }}
      >
-        Semantic Ready
+        {t('status.semanticReadyBadge')}
      </span>
    ),
-    title: 'AI index status',
-    desc: 'Repo is fully indexed for AI queries',
+    title: t('status.aiIndexStatus'),
+    desc: t('status.aiIndexStatusDesc'),
  },
  // { badge: <span style={{ fontSize: 11, fontWeight: 500, color: '#9ca3af', flexShrink: 0 }}>typescript</span>, title: 'Language', desc: 'Primary language detected in the repo' },
 ];
@@ -119,6 +119,8 @@ function TabContent({
  nodeCount: number;
  edgeCount: number;
 }) {
+  const { t } = useTranslation('help');
+
  if (active === 'overview')
    return (
      <div style={{ display: 'flex', flexDirection: 'column', gap: 10 }}>
@@ -131,7 +133,7 @@ function TabContent({
            letterSpacing: '0.08em',
          }}
        >
-          Getting started
+          {t('overview.gettingStarted')}
        </p>

        <div
@@ -143,11 +145,10 @@ function TabContent({
          }}
        >
          <p style={{ fontSize: 13, fontWeight: 500, color: '#e2e2e8', margin: '0 0 4px' }}>
-            What is GitNexus?
+            {t('overview.whatIsTitle')}
          </p>
          <p style={{ fontSize: 12, color: '#9ca3af', margin: 0, lineHeight: 1.6 }}>
-            An interactive graph explorer for your codebase. Every file, function, and import
-            becomes a node you can explore, query, and navigate visually.
+            {t('overview.whatIsDescription')}
          </p>
        </div>

@@ -160,11 +161,10 @@ function TabContent({
          }}
        >
          <p style={{ fontSize: 13, fontWeight: 500, color: '#e2e2e8', margin: '0 0 4px' }}>
-            Your current repo
+            {t('overview.currentRepoTitle')}
          </p>
          <p style={{ fontSize: 12, color: '#9ca3af', margin: 0, lineHeight: 1.6 }}>
-            Loaded: <span style={{ color: '#a78bfa', fontFamily: 'monospace' }}></span> {nodeCount}{' '}
-            nodes · {edgeCount} edges
+            {t('overview.loadedCounts', { nodeCount, edgeCount })}
          </p>
        </div>

@@ -177,15 +177,16 @@ function TabContent({
          }}
        >
          <p style={{ fontSize: 13, fontWeight: 500, color: '#e2e2e8', margin: '0 0 4px' }}>
-            Three ways to explore
+            {t('overview.threeWaysTitle')}
          </p>
          <p style={{ fontSize: 12, color: '#9ca3af', margin: 0, lineHeight: 1.6 }}>
-            <strong style={{ color: '#e2e2e8', fontWeight: 500 }}>1.</strong> Click nodes to inspect
+            <strong style={{ color: '#e2e2e8', fontWeight: 500 }}>1.</strong>{' '}
+            {t('overview.wayInspect')}
            <br />
-            <strong style={{ color: '#e2e2e8', fontWeight: 500 }}>2.</strong> Search by name or type
+            <strong style={{ color: '#e2e2e8', fontWeight: 500 }}>2.</strong>{' '}
+            {t('overview.waySearch')}
            <br />
-            <strong style={{ color: '#e2e2e8', fontWeight: 500 }}>3.</strong> Ask Nexus AI a natural
-            language question
+            <strong style={{ color: '#e2e2e8', fontWeight: 500 }}>3.</strong> {t('overview.wayAsk')}
          </p>
        </div>

@@ -198,11 +199,11 @@ function TabContent({
          }}
        >
          <p style={{ fontSize: 13, fontWeight: 500, color: '#e2e2e8', margin: '0 0 4px' }}>
-            Navigation
+            {t('overview.navigationTitle')}
          </p>
          <p style={{ fontSize: 12, color: '#9ca3af', margin: 0, lineHeight: 1.6 }}>
-            · Scroll to zoom <br />
-            · Click and drag to pan <br />· Double-click a node to focus its subgraph
+            · {t('overview.navZoom')} <br />· {t('overview.navPan')} <br />·{' '}
+            {t('overview.navFocus')}
          </p>
        </div>
      </div>
@@ -220,44 +221,44 @@ function TabContent({
            letterSpacing: '0.08em',
          }}
        >
-          Node color legend
+          {t('graph.nodeColorLegend')}
        </p>

-        {nodeColors.map(({ color, label, desc }) => (
-          <div key={label} style={{ display: 'flex', gap: 10, alignItems: 'flex-start' }}>
-            <span
-              style={{
-                width: 12,
-                height: 12,
-                borderRadius: '50%',
-                background: color,
-                flexShrink: 0,
-                marginTop: 2,
-              }}
-            />
-            <div>
-              <p style={{ fontSize: 12, fontWeight: 500, color: '#e2e2e8', margin: '0 0 2px' }}>
-                {label} nodes
-              </p>
-              <p style={{ fontSize: 12, color: '#9ca3af', margin: 0 }}>{desc}</p>
+        {nodeColors.map(({ color, labelKey, descKey }) => {
+          const label = t(labelKey);
+          return (
+            <div key={labelKey} style={{ display: 'flex', gap: 10, alignItems: 'flex-start' }}>
+              <span
+                style={{
+                  width: 12,
+                  height: 12,
+                  borderRadius: '50%',
+                  background: color,
+                  flexShrink: 0,
+                  marginTop: 2,
+                }}
+              />
+              <div>
+                <p style={{ fontSize: 12, fontWeight: 500, color: '#e2e2e8', margin: '0 0 2px' }}>
+                  {t('graph.nodeLabel', { label })}
+                </p>
+                <p style={{ fontSize: 12, color: '#9ca3af', margin: 0 }}>{t(descKey)}</p>
+              </div>
            </div>
-          </div>
-        ))}
+          );
+        })}

        <div style={{ borderTop: '0.5px solid rgba(255,255,255,0.08)', margin: '4px 0' }} />

        <p style={{ fontSize: 12, color: '#9ca3af', margin: 0, lineHeight: 1.6 }}>
-          Node <strong style={{ color: '#e2e2e8', fontWeight: 500 }}>size</strong> reflects
-          connection count — larger nodes are depended on by more files. Edges point from importer →
-          imported.
+          {t('graph.sizeDescription')}
        </p>

        <div
          style={{ background: 'rgba(255,255,255,0.04)', borderRadius: 10, padding: '10px 14px' }}
        >
          <p style={{ fontSize: 12, color: '#9ca3af', margin: 0, lineHeight: 1.6 }}>
-            Click any node to open its detail panel — showing imports, exports, and reverse
-            dependencies.
+            {t('graph.detailDescription')}
          </p>
        </div>
      </div>
@@ -275,7 +276,7 @@ function TabContent({
            letterSpacing: '0.08em',
          }}
        >
-          Search & filter
+          {t('search.title')}
        </p>

        <div
@@ -284,12 +285,11 @@ function TabContent({
          <div style={{ display: 'flex', alignItems: 'center', gap: 8, marginBottom: 6 }}>
            <kbd style={kbdStyle}>⌘K</kbd>/<kbd style={kbdStyle}>Ctrl K</kbd>
            <p style={{ fontSize: 12, fontWeight: 500, color: '#e2e2e8', margin: 0 }}>
-              Search nodes
+              {t('search.searchNodes')}
            </p>
          </div>
          <p style={{ fontSize: 12, color: '#9ca3af', margin: 0, lineHeight: 1.6 }}>
-            Search by filename, function name, or import path. Matching nodes are highlighted live
-            in the graph.
+            {t('search.searchDescription')}
          </p>
        </div>

@@ -299,12 +299,11 @@ function TabContent({
          <div style={{ display: 'flex', alignItems: 'center', gap: 8, marginBottom: 6 }}>
            <Filter style={{ width: 14, height: 14, color: '#a78bfa', flexShrink: 0 }} />
            <p style={{ fontSize: 12, fontWeight: 500, color: '#e2e2e8', margin: 0 }}>
-              Filter panel
+              {t('search.filterPanel')}
            </p>
          </div>
          <p style={{ fontSize: 12, color: '#9ca3af', margin: 0, lineHeight: 1.6 }}>
-            Use the filter icon in the left sidebar to isolate specific node types, hide leaf nodes,
-            or focus on a depth range from a selected root.
+            {t('search.filterDescription')}
          </p>
        </div>

@@ -312,13 +311,13 @@ function TabContent({
          style={{ background: 'rgba(255,255,255,0.04)', borderRadius: 10, padding: '12px 14px' }}
        >
          <p style={{ fontSize: 12, fontWeight: 500, color: '#e2e2e8', margin: '0 0 6px' }}>
-            Search syntax
+            {t('search.syntax')}
          </p>
          {[
-            { query: 'auth', hint: 'match by name fragment' },
-            { query: './utils/', hint: 'match by path prefix' },
-            { query: 'type:config', hint: 'filter by node type' },
-          ].map(({ query, hint }) => (
+            { query: 'auth', hintKey: 'search.hints.nameFragment' },
+            { query: './utils/', hintKey: 'search.hints.pathPrefix' },
+            { query: 'type:config', hintKey: 'search.hints.nodeType' },
+          ].map(({ query, hintKey }) => (
            <div
              key={query}
              style={{ display: 'flex', alignItems: 'baseline', gap: 8, marginBottom: 4 }}
@@ -336,7 +335,7 @@ function TabContent({
              >
                {query}
              </code>
-              <span style={{ fontSize: 12, color: '#6b7280' }}>{hint}</span>
+              <span style={{ fontSize: 12, color: '#6b7280' }}>{t(hintKey)}</span>
            </div>
          ))}
        </div>
@@ -355,7 +354,7 @@ function TabContent({
            letterSpacing: '0.08em',
          }}
        >
-          Nexus AI
+          {t('ai.title')}
        </p>

        <div
@@ -367,20 +366,19 @@ function TabContent({
          }}
        >
          <p style={{ fontSize: 12, fontWeight: 500, color: '#a78bfa', margin: '0 0 4px' }}>
-            ✓ Semantic Ready
+            {t('ai.semanticReady')}
          </p>
          <p style={{ fontSize: 12, color: '#9ca3af', margin: 0, lineHeight: 1.6 }}>
-            Your repo is indexed and ready for semantic queries. Nexus AI understands code structure
-            and relationships, not just file names.
+            {t('ai.description')}
          </p>
        </div>

-        <p style={{ fontSize: 12, color: '#9ca3af', margin: '4px 0 2px' }}>Try asking:</p>
+        <p style={{ fontSize: 12, color: '#9ca3af', margin: '4px 0 2px' }}>{t('tryAsking')}</p>
        {[
-          '"Which files depend on the auth module?"',
-          '"Find circular dependencies in this repo"',
-          '"What are the most connected components?"',
-          '"Show me all files that import useEffect"',
+          t('ai.questions.dependencies'),
+          t('ai.questions.circular'),
+          t('ai.questions.connected'),
+          t('ai.questions.imports'),
        ].map((q) => (
          <div
            key={q}
@@ -400,8 +398,7 @@ function TabContent({
        <div style={{ borderTop: '0.5px solid rgba(255,255,255,0.08)', margin: '4px 0' }} />

        <p style={{ fontSize: 12, color: '#6b7280', margin: 0, lineHeight: 1.6 }}>
-          Open the prompt via the <span style={{ color: '#e2e2e8' }}>Nexus AI</span> button
-          (top-right).
+          {t('ai.openPrompt')}
        </p>
      </div>
    );
@@ -428,7 +425,7 @@ function TabContent({
              letterSpacing: '0.08em',
            }}
          >
-            Action
+            {t('shortcuts.columns.action')}
          </span>
          <span
            style={{
@@ -454,9 +451,9 @@ function TabContent({
          </span>
        </div>

-        {shortcuts.map(({ label, mac, win }, i) => (
+        {shortcuts.map(({ labelKey, mac, win }, i) => (
          <div
-            key={label}
+            key={labelKey}
            style={{
              display: 'grid',
              gridTemplateColumns: '1fr 80px 88px',
@@ -467,7 +464,7 @@ function TabContent({
                i < shortcuts.length - 1 ? '0.5px solid rgba(255,255,255,0.05)' : 'none',
            }}
          >
-            <span style={{ fontSize: 12, color: '#9ca3af' }}>{label}</span>
+            <span style={{ fontSize: 12, color: '#9ca3af' }}>{t(labelKey)}</span>
            <span style={{ display: 'flex', justifyContent: 'center' }}>
              <kbd style={kbdStyle}>{mac}</kbd>
            </span>
@@ -491,9 +488,9 @@ function TabContent({
            letterSpacing: '0.08em',
          }}
        >
-          Status bar explained
+          {t('status.explained')}
        </p>
-        {getStatusItems(nodeCount, edgeCount).map(({ badge, title, desc }) => (
+        {getStatusItems(t, nodeCount, edgeCount).map(({ badge, title, desc }) => (
          <div
            key={title}
            style={{
@@ -521,7 +518,9 @@ function TabContent({
 }

 export const HelpPanel = ({ isOpen, onClose, nodeCount, edgeCount }: HelpPanelProps) => {
+  const { t } = useTranslation('help');
  const [active, setActive] = useState<TabId>('overview');
+  const localizedTabs = tabs.map((tab) => ({ ...tab, label: t(`tabs.${tab.id}`) }));

  if (!isOpen) return null;

@@ -592,9 +591,9 @@ export const HelpPanel = ({ isOpen, onClose, nodeCount, edgeCount }: HelpPanelPr
            </div>
            <div>
              <h2 style={{ fontSize: 16, fontWeight: 600, color: '#e2e2e8', margin: 0 }}>
-                Help & Reference
+                {t('title')}
              </h2>
-              <p style={{ fontSize: 12, color: '#6b7280', margin: 0 }}>GitNexus — graph explorer</p>
+              <p style={{ fontSize: 12, color: '#6b7280', margin: 0 }}>{t('footer')}</p>
            </div>
          </div>
          <button
@@ -632,7 +631,7 @@ export const HelpPanel = ({ isOpen, onClose, nodeCount, edgeCount }: HelpPanelPr
              gap: 2,
            }}
          >
-            {tabs.map(({ id, label, icon }) => {
+            {localizedTabs.map(({ id, label, icon }) => {
              const isActive = active === id;
              return (
                <button
@@ -699,16 +698,14 @@ export const HelpPanel = ({ isOpen, onClose, nodeCount, edgeCount }: HelpPanelPr
            background: 'rgba(255,255,255,0.01)',
          }}
        >
-          <span style={{ fontSize: 11, color: '#4b5563' }}>
-            GitNexus — open source codebase graph explorer
-          </span>
+          <span style={{ fontSize: 11, color: '#4b5563' }}>{t('footerLong')}</span>
          <a
            href="https://github.com/abhigyanpatwari/GitNexus"
            target="_blank"
            rel="noopener noreferrer"
            style={{ fontSize: 11, color: '#a78bfa', textDecoration: 'none' }}
          >
-            Docs & GitHub ↗
+            {t('docsGithub')}
          </a>
        </div>
      </div>
@@ -0,0 +1,43 @@
+import { Globe } from '@/lib/lucide-icons';
+import { useTranslation } from 'react-i18next';
+import { SUPPORTED_LANGUAGES, type SupportedLanguage } from '../i18n/languages';
+
+export const LanguageSwitcher = () => {
+  const { t, i18n } = useTranslation('header');
+  const currentLanguage = i18n.resolvedLanguage || i18n.language;
+  const currentLanguageMetadata =
+    SUPPORTED_LANGUAGES.find(
+      (language) => language.code.toLowerCase() === currentLanguage.toLowerCase(),
+    ) ?? SUPPORTED_LANGUAGES[0];
+
+  const handleChange = (language: SupportedLanguage) => {
+    void i18n.changeLanguage(language);
+  };
+
+  return (
+    <label
+      className="flex h-9 items-center gap-1.5 rounded-md border border-border-subtle bg-surface px-2 text-text-secondary transition-colors hover:border-border-default hover:bg-hover hover:text-text-primary"
+      title={t('selectLanguage')}
+    >
+      <Globe className="h-4 w-4" aria-hidden="true" />
+      <span className="sr-only">{t('language')}</span>
+      <select
+        data-testid="language-switcher"
+        value={currentLanguageMetadata.code}
+        aria-label={t('selectLanguage')}
+        onChange={(event) => handleChange(event.target.value as SupportedLanguage)}
+        className="cursor-pointer border-none bg-transparent text-xs font-medium outline-none"
+      >
+        {SUPPORTED_LANGUAGES.map((language) => (
+          <option
+            key={language.code}
+            value={language.code}
+            className="bg-surface text-text-primary"
+          >
+            {language.nativeName}
+          </option>
+        ))}
+      </select>
+    </label>
+  );
+};
@@ -1,10 +1,16 @@
 import type { PipelineProgress } from 'gitnexus-shared';
+import { useTranslation } from 'react-i18next';
+import { translateProgressMessage } from '../i18n/progress';

 interface LoadingOverlayProps {
  progress: PipelineProgress;
 }

 export const LoadingOverlay = ({ progress }: LoadingOverlayProps) => {
+  const { t } = useTranslation(['common', 'graph']);
+  const message = translateProgressMessage(progress.message, t);
+  const detail = translateProgressMessage(progress.detail, t);
+
  return (
    <div className="fixed inset-0 z-50 flex flex-col items-center justify-center bg-void">
      {/* Background gradient effects */}
@@ -32,11 +38,11 @@ export const LoadingOverlay = ({ progress }: LoadingOverlayProps) => {
      {/* Status text */}
      <div className="text-center">
        <p className="mb-1 font-mono text-sm text-text-secondary">
-          {progress.message}
+          {message}
          <span className="animate-pulse">|</span>
        </p>
        {progress.detail && (
-          <p className="max-w-md truncate font-mono text-xs text-text-muted">{progress.detail}</p>
+          <p className="max-w-md truncate font-mono text-xs text-text-muted">{detail}</p>
        )}
      </div>

@@ -46,12 +52,15 @@ export const LoadingOverlay = ({ progress }: LoadingOverlayProps) => {
          <div className="flex items-center gap-2">
            <span className="h-2 w-2 rounded-full bg-node-file" />
            <span>
-              {progress.stats.filesProcessed} / {progress.stats.totalFiles} files
+              {t('graph:loading.filesProgress', {
+                processed: progress.stats.filesProcessed,
+                total: progress.stats.totalFiles,
+              })}
            </span>
          </div>
          <div className="flex items-center gap-2">
            <span className="h-2 w-2 rounded-full bg-node-function" />
-            <span>{progress.stats.nodesCreated} nodes</span>
+            <span>{t('common:counts.nodes', { count: progress.stats.nodesCreated })}</span>
          </div>
        </div>
      )}
@@ -5,6 +5,7 @@ import { Prism as SyntaxHighlighter } from 'react-syntax-highlighter';
 import { vscDarkPlus } from 'react-syntax-highlighter/dist/esm/styles/prism';
 import { MermaidDiagram } from './MermaidDiagram';
 import { ToolCallCard } from './ToolCallCard';
+import { useTranslation } from 'react-i18next';
 import { Copy, Check } from '@/lib/lucide-icons';

 // Custom syntax theme
@@ -38,6 +39,7 @@ export const MarkdownRenderer: React.FC<MarkdownRendererProps> = ({
  toolCalls,
  showCopyButton = false,
 }) => {
+  const { t } = useTranslation('common');
  const [copied, setCopied] = useState(false);
  const copyTimerRef = useRef<ReturnType<typeof setTimeout>>(undefined);

@@ -125,7 +127,9 @@ export const MarkdownRenderer: React.FC<MarkdownRendererProps> = ({
              href={hrefStr}
              onClick={(e) => handleLinkClick(e, hrefStr)}
              className={`${baseParams} ${colorParams}`}
-              title={isNodeRef ? `View ${inner} in Code panel` : `Open in Code panel • ${inner}`}
+              title={t(isNodeRef ? 'chat.viewNodeInCodePanel' : 'chat.openInCodePanel', {
+                inner,
+              })}
              {...props}
            >
              <span className="text-inherit">{children}</span>
@@ -182,7 +186,7 @@ export const MarkdownRenderer: React.FC<MarkdownRendererProps> = ({
      },
      pre: ({ children }: any) => <>{children}</>,
    }),
-    [handleLinkClick],
+    [handleLinkClick, t],
  );

  return (
@@ -205,14 +209,14 @@ export const MarkdownRenderer: React.FC<MarkdownRendererProps> = ({
          <button
            onClick={handleCopy}
            className="flex items-center gap-1.5 rounded border border-transparent px-2 py-1 text-xs text-text-muted transition-all hover:border-border-subtle hover:bg-surface hover:text-text-primary"
-            title="Copy to clipboard"
+            title={t('actions.copy')}
          >
            {copied ? (
              <Check className="h-3.5 w-3.5 text-emerald-400" />
            ) : (
              <Copy className="h-3.5 w-3.5" />
            )}
-            <span>{copied ? 'Copied' : 'Copy'}</span>
+            <span>{copied ? t('actions.copied') : t('actions.copy')}</span>
          </button>
        </div>
      )}
@@ -1,4 +1,5 @@
 import { Suspense, useEffect, useRef, useState, lazy } from 'react';
+import { useTranslation } from 'react-i18next';
 import mermaid from 'mermaid';
 import DOMPurify from 'dompurify';
 import { AlertTriangle, Maximize2 } from '@/lib/lucide-icons';
@@ -55,6 +56,7 @@ interface MermaidDiagramProps {
 }

 export const MermaidDiagram = ({ code }: MermaidDiagramProps) => {
+  const { t } = useTranslation(['graph']);
  const containerRef = useRef<HTMLDivElement>(null);
  const [error, setError] = useState<string | null>(null);
  const [showModal, setShowModal] = useState(false);
@@ -98,7 +100,7 @@ export const MermaidDiagram = ({ code }: MermaidDiagramProps) => {
  const processData: any = showModal
    ? {
        id: 'ai-generated',
-        label: 'AI Generated Diagram',
+        label: t('graph:diagram.aiGenerated'),
        processType: 'intra_community',
        steps: [], // Empty - we'll render raw mermaid
        edges: [],
@@ -112,12 +114,12 @@ export const MermaidDiagram = ({ code }: MermaidDiagramProps) => {
      <div className="my-3 rounded-lg border border-rose-500/30 bg-rose-500/10 p-4">
        <div className="mb-2 flex items-center gap-2 text-sm text-rose-300">
          <AlertTriangle className="h-4 w-4" />
-          <span className="font-medium">Diagram Error</span>
+          <span className="font-medium">{t('graph:diagram.error')}</span>
        </div>
        <pre className="font-mono text-xs whitespace-pre-wrap text-rose-200/70">{error}</pre>
        <details className="mt-2">
          <summary className="cursor-pointer text-xs text-text-muted hover:text-text-secondary">
-            Show source
+            {t('graph:diagram.showSource')}
          </summary>
          <pre className="mt-2 overflow-x-auto rounded bg-surface p-2 text-xs text-text-muted">
            {code}
@@ -134,12 +136,12 @@ export const MermaidDiagram = ({ code }: MermaidDiagramProps) => {
          {/* Header */}
          <div className="flex items-center justify-between border-b border-border-subtle bg-surface/60 px-3 py-2">
            <span className="text-[10px] font-medium tracking-wider text-text-muted uppercase">
-              Diagram
+              {t('graph:diagram.label')}
            </span>
            <button
              onClick={() => setShowModal(true)}
              className="rounded p-1 text-text-muted transition-colors hover:bg-hover hover:text-text-primary"
-              title="Expand"
+              title={t('graph:diagram.expandTitle')}
            >
              <Maximize2 className="h-3.5 w-3.5" />
            </button>
@@ -161,7 +163,9 @@ export const MermaidDiagram = ({ code }: MermaidDiagramProps) => {

      {/* Use ProcessFlowModal for expansion */}
      {showModal && processData && (
-        <Suspense fallback={<div className="p-4 text-sm text-text-muted">Loading diagram…</div>}>
+        <Suspense
+          fallback={<div className="p-4 text-sm text-text-muted">{t('graph:diagram.loading')}</div>}
+        >
          <ProcessFlowModal process={processData} onClose={() => setShowModal(false)} />
        </Suspense>
      )}
@@ -1,6 +1,7 @@
 import { useState, useRef, useEffect } from 'react';
 import { Check, Copy, Terminal, Server, Zap, Sparkles } from '@/lib/lucide-icons';
 import { REQUIRED_NODE_VERSION } from '../config/ui-constants';
+import { useTranslation } from 'react-i18next';

 // ── Design constants ─────────────────────────────────────────────────────────

@@ -9,6 +10,7 @@ const isDev = import.meta.env.DEV;
 // ── Copy-to-clipboard button ─────────────────────────────────────────────────

 function CopyButton({ text }: { text: string }) {
+  const { t } = useTranslation('onboarding');
  const [copied, setCopied] = useState(false);
  const timerRef = useRef<ReturnType<typeof setTimeout> | null>(null);

@@ -32,7 +34,7 @@ function CopyButton({ text }: { text: string }) {
  return (
    <button
      onClick={handleCopy}
-      aria-label={copied ? 'Copied!' : 'Copy to clipboard'}
+      aria-label={copied ? t('guide.copiedAria') : t('guide.copyAria')}
      className={`shrink-0 cursor-pointer rounded-md px-2 py-1 transition-all duration-200 focus-visible:ring-2 focus-visible:ring-accent/40 focus-visible:outline-none ${
        copied
          ? 'bg-emerald-400/10 text-emerald-400'
@@ -128,6 +130,7 @@ function StepRow({
  description?: string;
  children?: React.ReactNode;
 }) {
+  const { t } = useTranslation('onboarding');
  const isVisible = state !== 'waiting';

  return (
@@ -151,7 +154,7 @@ function StepRow({
            </span>
            {state === 'done' && (
              <span className="animate-fade-in font-mono text-[10px] tracking-wider text-emerald-400/60 uppercase">
-                done
+                {t('guide.done')}
              </span>
            )}
          </div>
@@ -168,6 +171,8 @@ function StepRow({
 // ── Polling status bar ────────────────────────────────────────────────────────

 function PollingBar() {
+  const { t } = useTranslation('onboarding');
+
  return (
    <div
      className="flex animate-fade-in items-center gap-3 rounded-xl border border-accent/15 bg-accent/5 px-4 py-3"
@@ -183,12 +188,12 @@ function PollingBar() {

      <div className="min-w-0 flex-1">
        <p className="text-xs font-medium text-text-secondary">
-          Listening for server
+          {t('guide.listeningForServer')}
          <span className="ml-0.5 inline-flex text-text-muted">
            <span className="animate-pulse">...</span>
          </span>
        </p>
-        <p className="mt-0.5 text-[11px] text-text-muted">Will auto-connect when detected</p>
+        <p className="mt-0.5 text-[11px] text-text-muted">{t('guide.willAutoConnect')}</p>
      </div>
    </div>
  );
@@ -201,8 +206,9 @@ interface OnboardingGuideProps {
 }

 export const OnboardingGuide = ({ isPolling }: OnboardingGuideProps) => {
+  const { t } = useTranslation('onboarding');
  const primary = isDev ? 'npm run --prefix gitnexus serve' : 'npx gitnexus@latest serve';
-  const termLabel = isDev ? 'Start backend' : 'Terminal';
+  const termLabel = isDev ? t('guide.startBackend') : t('guide.terminal');

  // Step states: step 1 = copy command, step 2 = run/wait, step 3 = auto-connect
  // Once polling starts the user has presumably run the command — mark step 1 done.
@@ -226,12 +232,10 @@ export const OnboardingGuide = ({ isPolling }: OnboardingGuideProps) => {
            </span>
          </div>
          <h2 className="text-lg leading-snug font-semibold text-text-primary">
-            Start your local server
+            {t('guide.startServer')}
          </h2>
          <p className="mx-auto mt-1 max-w-xs text-sm leading-relaxed text-text-secondary">
-            {isDev
-              ? 'Fire up the Express backend in a separate terminal to unlock the full graph.'
-              : 'One command is all it takes. The browser connects automatically.'}
+            {isDev ? t('guide.devDescription') : t('guide.prodDescription')}
          </p>
        </div>
      </div>
@@ -248,8 +252,8 @@ export const OnboardingGuide = ({ isPolling }: OnboardingGuideProps) => {
        <StepRow
          state={step1State}
          number={1}
-          title="Copy the command"
-          description={isPolling ? undefined : 'Click the icon in the terminal to copy.'}
+          title={t('guide.copyCommand')}
+          description={isPolling ? undefined : t('guide.copyCommandDescription')}
        >
          <TerminalWindow command={primary} label={termLabel} isActive={step1State === 'active'} />

@@ -259,13 +263,13 @@ export const OnboardingGuide = ({ isPolling }: OnboardingGuideProps) => {
              <div className="my-3 flex items-center gap-3">
                <div className="h-px flex-1 bg-border-subtle" />
                <span className="text-[11px] tracking-widest text-text-muted uppercase">
-                  or install globally
+                  {t('guide.orInstallGlobally')}
                </span>
                <div className="h-px flex-1 bg-border-subtle" />
              </div>
              <TerminalWindow
                command="npm install -g gitnexus && gitnexus serve"
-                label="Global install"
+                label={t('guide.globalInstall')}
                isActive={false}
              />
            </>
@@ -276,10 +280,8 @@ export const OnboardingGuide = ({ isPolling }: OnboardingGuideProps) => {
        <StepRow
          state={step2State}
          number={2}
-          title={isPolling ? 'Waiting for server to start' : 'Paste and run in your terminal'}
-          description={
-            isPolling ? undefined : 'Open a terminal at the project root, paste, and hit Enter.'
-          }
+          title={isPolling ? t('guide.waitingForServer') : t('guide.pasteAndRun')}
+          description={isPolling ? undefined : t('guide.pasteAndRunDescription')}
        >
          {isPolling && <PollingBar />}
        </StepRow>
@@ -288,8 +290,8 @@ export const OnboardingGuide = ({ isPolling }: OnboardingGuideProps) => {
        <StepRow
          state={step3State}
          number={3}
-          title="Auto-connects and opens the graph"
-          description="No refresh needed — the page detects the server automatically."
+          title={t('guide.autoConnects')}
+          description={t('guide.autoConnectsDescription')}
        />
      </div>

@@ -297,7 +299,7 @@ export const OnboardingGuide = ({ isPolling }: OnboardingGuideProps) => {
      <div className="mt-6 flex items-center justify-center gap-1.5 border-t border-border-subtle pt-5 text-xs text-text-muted">
        <Server className="h-3 w-3 shrink-0" />
        <span>
-          Requires{' '}
+          {t('guide.requires')}{' '}
          <a
            href="https://nodejs.org"
            target="_blank"
@@ -309,7 +311,7 @@ export const OnboardingGuide = ({ isPolling }: OnboardingGuideProps) => {
        </span>
        <span className="mx-1 text-border-default">·</span>
        <Terminal className="h-3 w-3 shrink-0" />
-        <span>Port 4747</span>
+        <span>{t('guide.port')}</span>
      </div>
    </div>
  );
@@ -5,6 +5,7 @@
 */

 import { useEffect, useRef, useCallback, useState } from 'react';
+import { useTranslation } from 'react-i18next';
 import { Copy, Focus, ZoomIn, ZoomOut } from 'lucide-react';
 import mermaid from 'mermaid';
 import DOMPurify from 'dompurify';
@@ -59,6 +60,7 @@ export const ProcessFlowModal = ({
  onFocusInGraph,
  isFullScreen = false,
 }: ProcessFlowModalProps) => {
+  const { t } = useTranslation(['graph', 'common']);
  const containerRef = useRef<HTMLDivElement>(null);
  const diagramRef = useRef<HTMLDivElement>(null);
  const scrollContainerRef = useRef<HTMLDivElement>(null);
@@ -171,13 +173,13 @@ export const ProcessFlowModal = ({
        diagramRef.current!.innerHTML = `
          <div class="text-center p-8">
            <div class="text-red-400 text-sm font-medium mb-2">
-              ${isSizeError ? '📊 Diagram Too Large' : '⚠️ Render Error'}
+              ${isSizeError ? t('graph:processFlow.diagramTooLarge') : t('graph:processFlow.renderError')}
            </div>
            <div class="text-slate-400 text-xs max-w-md">
              ${
                isSizeError
-                  ? `This diagram has ${process.steps?.length || 0} steps and is too complex to render. Try viewing individual processes instead of "All Processes".`
-                  : `Unable to render diagram. Steps: ${process.steps?.length || 0}`
+                  ? t('graph:processFlow.tooComplex', { count: process.steps?.length || 0 })
+                  : t('graph:processFlow.unableToRender', { count: process.steps?.length || 0 })
              }
            </div>
          </div>
@@ -186,7 +188,7 @@ export const ProcessFlowModal = ({
    };

    renderDiagram();
-  }, [process]);
+  }, [process, t]);

  // Close on escape
  useEffect(() => {
@@ -242,7 +244,9 @@ export const ProcessFlowModal = ({

        {/* Header */}
        <div className="relative z-10 border-b border-white/10 px-6 py-5">
-          <h2 className="text-lg font-semibold text-white">Process: {process.label}</h2>
+          <h2 className="text-lg font-semibold text-white">
+            {t('graph:processFlow.title', { label: process.label })}
+          </h2>
        </div>

        {/* Diagram */}
@@ -271,7 +275,7 @@ export const ProcessFlowModal = ({
            <button
              onClick={handleZoomOut}
              className="rounded-md p-2 text-slate-300 transition-all hover:bg-white/10 hover:text-white"
-              title="Zoom out (-)"
+              title={t('graph:processFlow.zoomOutTitle')}
            >
              <ZoomOut className="h-4 w-4" />
            </button>
@@ -281,7 +285,7 @@ export const ProcessFlowModal = ({
            <button
              onClick={handleZoomIn}
              className="rounded-md p-2 text-slate-300 transition-all hover:bg-white/10 hover:text-white"
-              title="Zoom in (+)"
+              title={t('graph:processFlow.zoomInTitle')}
            >
              <ZoomIn className="h-4 w-4" />
            </button>
@@ -289,9 +293,9 @@ export const ProcessFlowModal = ({
          <button
            onClick={resetView}
            className="flex items-center gap-2 rounded-lg border border-white/10 bg-white/5 px-4 py-2.5 text-sm font-medium text-slate-300 transition-all hover:bg-white/10 hover:text-white"
-            title="Reset zoom and pan"
+            title={t('graph:processFlow.resetTitle')}
          >
-            Reset View
+            {t('graph:processFlow.resetView')}
          </button>
          {onFocusInGraph && (
            <button
@@ -299,7 +303,7 @@ export const ProcessFlowModal = ({
              className="flex items-center gap-2 rounded-lg bg-cyan-400 px-5 py-2.5 text-sm font-medium text-slate-900 shadow-lg shadow-cyan-500/20 transition-all hover:bg-cyan-300"
            >
              <Focus className="h-4 w-4" />
-              Toggle Focus
+              {t('graph:processFlow.toggleFocus')}
            </button>
          )}
          <button
@@ -307,13 +311,13 @@ export const ProcessFlowModal = ({
            className="flex items-center gap-2 rounded-lg bg-purple-600 px-5 py-2.5 text-sm font-medium text-white shadow-lg shadow-purple-500/20 transition-all hover:bg-purple-500"
          >
            <Copy className="h-4 w-4" />
-            Copy Mermaid
+            {t('graph:processFlow.copyMermaid')}
          </button>
          <button
            onClick={onClose}
            className="rounded-lg border border-white/10 bg-white/5 px-5 py-2.5 text-sm font-medium text-slate-300 transition-all hover:bg-white/10 hover:text-white"
          >
-            Close
+            {t('common:actions.close')}
          </button>
        </div>
      </div>
--- a/Show More
+++ b/Show More