initial commit

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: ["main"]
+    tags: ["v*"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 20
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      - name: Check dist is up to date
+        if: github.ref_type != 'tag'
+        run: |
+          if [ -n "$(git status --short dist/)" ]; then
+            echo "dist/ is out of date. Run 'npm run build' and commit the result."
+            git diff dist/
+            exit 1
+          fi
+
+  release:
+    runs-on: ubuntu-latest
+    needs: build
+    if: github.ref_type == 'tag'
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v6
+
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 20
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+      
+      - name: Make sure tag matches package.json version
+        run: |
+          TAG_VERSION="${GITHUB_REF#refs/tags/}"
+          PACKAGE_VERSION=$(node -p "require('./package.json').version")
+          if [ "$TAG_VERSION" != "$PACKAGE_VERSION" ]; then
+            echo "Tag version ($TAG_VERSION) does not match package.json version ($PACKAGE_VERSION)"
+            exit 1
+          fi
+
+      - name: Commit dist to tag
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add --force dist/
+          git commit -m "chore: build dist for ${{ github.ref_name }}" || echo "Nothing to commit"
+          git tag -f ${{ github.ref_name }}
+          git push origin ${{ github.ref_name }} --force
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          generate_release_notes: true