diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..1984cab
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,17 @@
+name: ci
+# Full gate: install pinned deps + run the kit test suite (node test/run.mjs).
+on:
+  push: { branches: [main] }
+  pull_request:
+  workflow_dispatch:
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-node@39370e3970a6d050c480ffad4ff0ed4d3fdee5af # v4.1.0
+        with:
+          node-version: 22.x
+          cache: npm
+      - run: npm ci
+      - run: npm test