ci: manage codeql workflow in repo

.github/workflows/ci.yml

@@ -12,6 +12,9 @@ on:
 permissions:
   contents: read
 
+env:
+  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+
 concurrency:
   group: ci-${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true

.github/workflows/codeql.yml

@@ -0,0 +1,50 @@
+name: CodeQL
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  schedule:
+    - cron: '31 16 * * 0'
+  workflow_dispatch:
+
+permissions:
+  actions: read
+  contents: read
+  security-events: write
+
+env:
+  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+
+jobs:
+  analyze:
+    name: Analyze (${{ matrix.language }})
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - language: actions
+            build-mode: none
+          - language: javascript-typescript
+            build-mode: none
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v5
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v4
+        with:
+          languages: ${{ matrix.language }}
+          build-mode: ${{ matrix.build-mode }}
+          dependency-caching: true
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v4
+        with:
+          category: /language:${{ matrix.language }}

.github/workflows/dependabot-auto-merge.yml

@@ -18,6 +18,9 @@ permissions:
   contents: write
   pull-requests: write
 
+env:
+  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+
 jobs:
   auto-merge:
     if: github.event.pull_request.user.login == 'dependabot[bot]' && !github.event.pull_request.draft

.github/workflows/image.yml

@@ -15,6 +15,9 @@ permissions:
   contents: read
   packages: write
 
+env:
+  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+
 concurrency:
   group: image-${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true

tests/github-automation.test.cjs

@@ -20,6 +20,7 @@ test('repository automation files exist for CI, container publish, and Dependabo
     '.eslintrc.cjs',
     '.eslintignore',
     '.github/workflows/ci.yml',
+    '.github/workflows/codeql.yml',
     '.github/workflows/image.yml',
     '.github/workflows/dependabot-auto-merge.yml',
     '.github/dependabot.yml',
@@ -45,6 +46,29 @@ test('container image publishing waits for CI instead of running on pull request
   assert.doesNotMatch(workflow, /pull_request:/);
 });
 
+test('workflows opt into Node 24 for JavaScript-based GitHub Actions', () => {
+  const workflows = [
+    read('.github/workflows/ci.yml'),
+    read('.github/workflows/codeql.yml'),
+    read('.github/workflows/image.yml'),
+    read('.github/workflows/dependabot-auto-merge.yml'),
+  ];
+
+  for (const workflow of workflows) {
+    assert.match(workflow, /FORCE_JAVASCRIPT_ACTIONS_TO_NODE24:\s*true/);
+  }
+});
+
+test('CodeQL workflow uses advanced setup with repository-managed configuration', () => {
+  const workflow = read('.github/workflows/codeql.yml');
+
+  assert.match(workflow, /uses:\s*actions\/checkout@v5/);
+  assert.match(workflow, /uses:\s*github\/codeql-action\/init@v4/);
+  assert.match(workflow, /uses:\s*github\/codeql-action\/analyze@v4/);
+  assert.match(workflow, /language:\s*actions/);
+  assert.match(workflow, /language:\s*javascript-typescript/);
+});
+
 test('dependabot config covers npm, docker, and github-actions updates', () => {
   const dependabot = read('.github/dependabot.yml');