diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
new file mode 100644
index 0000000..c3e5729
--- /dev/null
+++ b/.github/workflows/ci.yaml
@@ -0,0 +1,39 @@
+# https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-nodejs
+name: CI
+
+on:
+  push:
+    branches: ['main']
+  pull_request:
+    branches: ['main']
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    env:
+      # @devvit/test pulls in redis-memory-server, which by default downloads
+      # and compiles Redis (plus modules) from source on install and on first
+      # test run. That source build is slow and unreliable in CI. Point it at
+      # the prebuilt redis-server we install below: this both skips the
+      # install-time compile and makes the tests use the system binary.
+      REDISMS_SYSTEM_BINARY: /usr/bin/redis-server
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v7.0.0
+      - name: Install Node.js
+        uses: actions/setup-node@v6.4.0
+        with:
+          node-version: 22.20.0
+      - name: Install Redis
+        run: sudo apt-get update && sudo apt-get install -y redis-server
+      - name: Install Dependencies
+        run: npm install --no-fund
+      - parallel:
+          - name: Typecheck
+            run: npm run test:types
+          - name: Lint
+            run: npm run lint
+          - name: Unit Test
+            run: npm run test:unit
+          - name: Build
+            run: npm run build
diff --git a/package.json b/package.json
index 1eec728..dfad270 100644
--- a/package.json
+++ b/package.json
@@ -6,17 +6,18 @@
   "type": "module",
   "scripts": {
     "build": "vite build",
-    "deploy": "npm run type-check && npm run lint && npm run test && devvit upload",
+    "deploy": "npm run test:types && npm run lint && npm run test:unit && devvit upload",
     "dev": "devvit playtest",
     "launch": "npm run deploy && devvit publish",
     "lint": "eslint 'src/**/*.{ts,tsx}'",
     "login": "devvit login",
     "prettier": "prettier-package-json --write ./package.json && prettier --write .",
-    "test": "vitest run",
-    "type-check": "tsc --build"
+    "test": "npm run test:types && npm run lint && npm run test:unit && npm run build",
+    "test:types": "tsc --build",
+    "test:unit": "vitest run"
   },
   "engines": {
-    "node": ">=22.2.0"
+    "node": ">=22.12.0"
   },
   "dependencies": {
     "@devvit/start": "0.13.10",
@@ -45,6 +46,7 @@
     "eslint": "10.8.0",
     "eslint-plugin-react-hooks": "7.1.1",
     "eslint-plugin-react-refresh": "0.5.3",
+    "globals": "17.8.0",
     "prettier": "3.9.6",
     "prettier-package-json": "2.8.0",
     "prettier-plugin-tailwindcss": "0.8.1",