diff --git a/.github/workflows/upstream.yaml b/.github/workflows/upstream.yaml
new file mode 100644
index 0000000..1bcb44a
--- /dev/null
+++ b/.github/workflows/upstream.yaml
@@ -0,0 +1,28 @@
+name: Upstream
+
+on:
+  schedule:
+    - cron: "0 6 * * *"
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Use Node.js 24
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: "npm"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm test
+
+      - name: Check FlatBuffers generated code is up to date
+        run: npm run check:fbs