ci(actions): restore secrets audit lane

.github/workflows/ci.yml

@@ -492,6 +492,83 @@ jobs:
       - name: Test skill Python scripts
         run: python -m pytest -q skills
 
+  secrets:
+    if: github.event_name != 'pull_request' || !github.event.pull_request.draft
+    runs-on: blacksmith-16vcpu-ubuntu-2404
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+        with:
+          submodules: false
+
+      - name: Ensure secrets base commit
+        uses: ./.github/actions/ensure-base-commit
+        with:
+          base-sha: ${{ github.event_name == 'push' && github.event.before || github.event.pull_request.base.sha }}
+          fetch-ref: ${{ github.event_name == 'push' && github.ref_name || github.event.pull_request.base.ref }}
+
+      - name: Setup Node environment
+        uses: ./.github/actions/setup-node-env
+        with:
+          install-bun: "false"
+          use-sticky-disk: "false"
+          install-deps: "false"
+
+      - name: Setup Python
+        id: setup-python
+        uses: actions/setup-python@v6
+        with:
+          python-version: "3.12"
+          cache: "pip"
+          cache-dependency-path: |
+            pyproject.toml
+            .pre-commit-config.yaml
+            .github/workflows/ci.yml
+
+      - name: Restore pre-commit cache
+        uses: actions/cache@v5
+        with:
+          path: ~/.cache/pre-commit
+          key: pre-commit-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-${{ hashFiles('.pre-commit-config.yaml') }}
+
+      - name: Install pre-commit
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install pre-commit
+
+      - name: Detect committed private keys
+        run: pre-commit run --all-files detect-private-key
+
+      - name: Audit changed GitHub workflows with zizmor
+        env:
+          BASE_SHA: ${{ github.event_name == 'push' && github.event.before || github.event.pull_request.base.sha }}
+        run: |
+          set -euo pipefail
+
+          if [ -z "${BASE_SHA:-}" ] || [ "${BASE_SHA}" = "0000000000000000000000000000000000000000" ]; then
+            echo "No usable base SHA detected; skipping zizmor."
+            exit 0
+          fi
+
+          if ! git cat-file -e "${BASE_SHA}^{commit}" 2>/dev/null; then
+            echo "Base SHA ${BASE_SHA} is unavailable; skipping zizmor."
+            exit 0
+          fi
+
+          mapfile -t workflow_files < <(
+            git diff --name-only "${BASE_SHA}" HEAD -- '.github/workflows/*.yml' '.github/workflows/*.yaml'
+          )
+          if [ "${#workflow_files[@]}" -eq 0 ]; then
+            echo "No workflow changes detected; skipping zizmor."
+            exit 0
+          fi
+
+          printf 'Auditing workflow files:\n%s\n' "${workflow_files[@]}"
+          pre-commit run zizmor --files "${workflow_files[@]}"
+
+      - name: Audit production dependencies
+        run: pre-commit run --all-files pnpm-audit-prod
+
   checks-windows:
     needs: [docs-scope, changed-scope]
     if: needs.docs-scope.outputs.docs_only != 'true' && needs.changed-scope.outputs.run_windows == 'true'