diff --git a/.forgejo/workflows/ci.yml b/.forgejo/workflows/ci.yml
new file mode 100644
index 0000000..bcf151a
--- /dev/null
+++ b/.forgejo/workflows/ci.yml
@@ -0,0 +1,32 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - name: Install + type-check + build frontend
+        run: |
+          npm ci
+          npx tsc --noEmit
+          npm run build
+
+      - name: Install + type-check + build backend
+        working-directory: backend
+        run: |
+          npm ci
+          npx tsc --noEmit
+          npm run build