diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..4e9619e
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,13 @@
+NODE_ENV=development
+NEXT_PUBLIC_LOG_LEVEL=info
+NEXT_PUBLIC_302_WEBSITE_URL_GLOBAL=https://302.ai
+NEXT_PUBLIC_302_WEBSITE_URL_CHINA=https://302.ai
+NEXT_PUBLIC_302_API_KEY=your_302_api_key
+NEXT_PUBLIC_API_URL=http://localhost:3000
+NEXT_PUBLIC_AUTH_API_URL=http://localhost:3000
+NEXT_PUBLIC_AUTH_PATH=/auth
+NEXT_PUBLIC_IS_CHINA=false
+NEXT_PUBLIC_DEFAULT_LOCALE=en
+NEXT_PUBLIC_DEFAULT_MODEL_NAME=gpt-4.1-mini
+NEXT_PUBLIC_DEV_HOST_NAME=localhost
+NEXT_PUBLIC_HIDE_BRAND=false
diff --git a/.github/workflows/envdrift.yml b/.github/workflows/envdrift.yml
new file mode 100644
index 0000000..e4d8073
--- /dev/null
+++ b/.github/workflows/envdrift.yml
@@ -0,0 +1,19 @@
+name: Env Drift
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+jobs:
+  envdrift:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+      - name: Check .env.example drift (src)
+        run: npx -y github:jszzr/envdrift#v0.1.0 . --example .env.example --include src