diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
new file mode 100644
index 00000000..656b9c8c
--- /dev/null
+++ b/.github/workflows/format.yml
@@ -0,0 +1,18 @@
+name: SAM3/ufmt
+on:
+  pull_request:
+    branches:
+    - main
+jobs:
+  ufmt_check:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install ruff-api
+        run: pip install ruff-api==0.1.0
+      - name: Check formatting
+        uses: omnilib/ufmt@action-v1
+        with:
+          path: sam3 scripts
+          python-version: "3.12"
+          black-version: "24.2.0"
+          usort-version: "1.0.2"