test: add grammar loader smoke test + CI workflow

- Smoke test loads all 27 grammars via parseSource(), catching missing
  packages, broken native builds, and incorrect require() paths.
- CI matrix: Node 20/22/24 × ubuntu/macos. Runs tsc, tests, build,
  and a tarball install test (simulates npm install -g).
- NODE_MODULE_VERSION mismatches (local Node upgrades) are skipped
  in tests — CI's fresh install matrix catches those instead.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: rushikeshmore

.github/workflows/ci.yml

@@ -0,0 +1,45 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        node-version: [20, 22, 24]
+        os: [ubuntu-latest, macos-latest]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm install --legacy-peer-deps
+      - run: npx tsc --noEmit
+      - run: npm test
+      - run: npm run build
+
+  install-test:
+    runs-on: ${{ matrix.os }}
+    needs: test
+    strategy:
+      matrix:
+        node-version: [20, 22, 24]
+        os: [ubuntu-latest, macos-latest]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm install --legacy-peer-deps
+      - run: npm pack
+      - name: Install from tarball (simulates npm install -g)
+        run: npm install -g ./codecortex-ai-*.tgz --legacy-peer-deps
+      - name: Verify CLI works
+        run: |
+          codecortex --version
+          codecortex --help

tests/extraction/parser.test.ts

@@ -81,6 +81,27 @@ describe('supportedLanguages', () => {
   })
 })
 
+describe('grammar loader smoke test', () => {
+  const langs = supportedLanguages()
+
+  it.each(langs)('%s grammar loads without error', (lang) => {
+    // This catches: missing npm packages, broken native builds,
+    // incorrect require() paths (e.g. .typescript, .php, .ocaml sub-exports)
+    // NODE_MODULE_VERSION mismatches (stale rebuild after Node upgrade) are
+    // skipped locally — they're caught by CI's fresh install matrix instead.
+    try {
+      parseSource('x', lang)
+    } catch (e: unknown) {
+      const msg = e instanceof Error ? e.message : String(e)
+      if (msg.includes('NODE_MODULE_VERSION')) {
+        // Stale native build from Node version switch — skip, CI catches this
+        return
+      }
+      throw e
+    }
+  })
+})
+
 describe('initParser', () => {
   it('is a no-op (native bindings need no async init)', async () => {
     await expect(initParser()).resolves.toBeUndefined()