diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..b516e07
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,33 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  ci:
+    name: Typecheck, Test, Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.7
+
+      - uses: actions/setup-node@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5.3.0
+        with:
+          node-version: 20
+          cache: npm
+
+      - run: npm ci
+
+      - name: Typecheck
+        run: npx tsc --noEmit
+
+      - name: Test
+        run: npm test
+
+      - name: Build
+        run: npm run build