diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..6eacc6c
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,22 @@
+name: Validate static app
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Check browser JavaScript syntax
+        run: node --check src/app.js
+
+      - name: Compile Python helpers
+        run: python3 -m py_compile scripts/*.py
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
deleted file mode 100644
index 064ec1e..0000000
--- a/.github/workflows/deploy.yml
+++ /dev/null
@@ -1,37 +0,0 @@
-name: Deploy to GitHub Pages
-
-on:
-  push:
-    branches: [ main ]
-  workflow_dispatch:
-
-permissions:
-  contents: read
-  pages: write
-  id-token: write
-
-concurrency:
-  group: "pages"
-  cancel-in-progress: false
-
-jobs:
-  deploy:
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      
-      - name: Setup Pages
-        uses: actions/configure-pages@v4
-      
-      - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
-        with:
-          path: '.'
-      
-      - name: Deploy to GitHub Pages
-        id: deployment
-        uses: actions/deploy-pages@v4 
\ No newline at end of file