diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
new file mode 100644
index 0000000..259ec68
--- /dev/null
+++ b/.github/workflows/check.yml
@@ -0,0 +1,10 @@
+name: CI
+on:
+  pull_request: {}
+jobs:
+  main:
+    name: Build, Validate
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: w3c/spec-prod@v2