feat: add semantic-release and commitlint for automated versioning

- Replace manual version check with semantic-release for automatic
  version bumping, npm publishing, and GitHub releases
- Add commitlint to enforce conventional commit messages on PRs
- Commit messages now determine version bumps:
  fix: → patch, feat: → minor, feat!:/BREAKING CHANGE: → major

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

Author: critesjosh

.github/workflows/ci.yml

@@ -7,6 +7,20 @@ on:
     branches: [main]
 
 jobs:
+  commitlint:
+    runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request'
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+      - run: npm ci
+      - name: Lint commits
+        run: npx commitlint --from ${{ github.event.pull_request.base.sha }} --to ${{ github.event.pull_request.head.sha }} --verbose
+
   test:
     runs-on: ubuntu-latest
     steps:
@@ -18,30 +32,26 @@ jobs:
       - run: npm test
       - run: npm run build
 
-  publish:
+  release:
     needs: test
     runs-on: ubuntu-latest
     if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    permissions:
+      contents: write
+      issues: write
+      pull-requests: write
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
       - uses: actions/setup-node@v4
         with:
           node-version: 20
           registry-url: https://registry.npmjs.org
       - run: npm ci
       - run: npm run build
-      - name: Check if version changed
-        id: version
-        run: |
-          CURRENT=$(node -p "require('./package.json').version")
-          PUBLISHED=$(npm view @aztec/mcp-server version 2>/dev/null || echo "0.0.0")
-          if [ "$CURRENT" != "$PUBLISHED" ]; then
-            echo "changed=true" >> $GITHUB_OUTPUT
-          else
-            echo "changed=false" >> $GITHUB_OUTPUT
-          fi
-      - name: Publish to npm
-        if: steps.version.outputs.changed == 'true'
-        run: npm publish
+      - name: Release
+        run: npx semantic-release
         env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

.releaserc.json

@@ -0,0 +1,9 @@
+{
+  "branches": ["main"],
+  "plugins": [
+    "@semantic-release/commit-analyzer",
+    "@semantic-release/release-notes-generator",
+    "@semantic-release/npm",
+    "@semantic-release/github"
+  ]
+}

commitlint.config.js

@@ -0,0 +1 @@
+export default { extends: ['@commitlint/config-conventional'] };