diff --git a/.github/workflows/typecheck.yml b/.github/workflows/typecheck.yml
new file mode 100644
index 00000000..346b8616
--- /dev/null
+++ b/.github/workflows/typecheck.yml
@@ -0,0 +1,20 @@
+name: Typecheck
+
+on:
+  pull_request:
+  push:
+    branches: [ main ]
+
+permissions:
+  contents: read
+
+jobs:
+  typecheck:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 18
+      - run: npm ci
+      - run: npm run typecheck