diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
new file mode 100644
index 0000000..efabf65
--- /dev/null
+++ b/.github/workflows/CI.yml
@@ -0,0 +1,17 @@
+name: CI
+
+on:
+  push:
+    branches: main
+  pull_request:
+
+jobs:
+  format:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: latest
+      - run: npx prettier . --write
+      - run: git diff