chore: automate canary and stable releases

.github/workflows/release-canary.yml

@@ -0,0 +1,94 @@
+name: Release Canary
+
+on:
+  push:
+    branches:
+      - master
+
+concurrency:
+  group: release-canary-master
+  cancel-in-progress: false
+
+jobs:
+  verify:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 9.15.4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: pnpm
+
+      - name: Install dependencies
+        run: pnpm install --no-frozen-lockfile
+
+      - name: Typecheck
+        run: pnpm -r typecheck
+
+      - name: Run tests
+        run: pnpm test:run
+
+      - name: Build
+        run: pnpm build
+
+  publish:
+    needs: verify
+    runs-on: ubuntu-latest
+    timeout-minutes: 45
+    environment: npm-canary
+    permissions:
+      contents: write
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 9.15.4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: pnpm
+
+      - name: Install dependencies
+        run: pnpm install --no-frozen-lockfile
+
+      - name: Configure git author
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+
+      - name: Publish canary
+        env:
+          GITHUB_ACTIONS: "true"
+        run: ./scripts/release.sh canary --skip-verify
+
+      - name: Push canary tag
+        run: |
+          tag="$(git tag --points-at HEAD | grep '^canary/v' | head -1)"
+          if [ -z "$tag" ]; then
+            echo "Error: no canary tag points at HEAD after release." >&2
+            exit 1
+          fi
+          git push origin "refs/tags/${tag}"