diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..f704854
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,52 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+          cache: "npm"
+
+      - run: npm ci
+
+      - run: npm run typecheck
+        name: Type check
+
+      - run: npm test
+        name: Test
+
+  publish:
+    needs: test
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/master' && github.event_name == 'push'
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+          cache: "npm"
+
+      - run: npm ci
+
+      - run: npm run build
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+          registry-url: "https://registry.npmjs.org"
+          cache: "npm"
+
+      - run: npm publish --access public
+        env:
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}