diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..cb3d834
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,51 @@
+# CI for gnexus-ui-kit.
+# The Playwright image version must match the installed @playwright/test
+# version (browsers are preinstalled there, so no `playwright install`).
+image: mcr.microsoft.com/playwright:v1.60.0-noble
+
+stages:
+  - build
+  - test
+
+variables:
+  npm_config_cache: "$CI_PROJECT_DIR/.npm-cache"
+
+cache:
+  key:
+    files:
+      - package-lock.json
+  paths:
+    - .npm-cache
+
+build:
+  stage: build
+  script:
+    - npm ci
+    - npm ci --prefix examples/vue
+    - npx gulp build
+  artifacts:
+    paths:
+      - dist/
+    expire_in: 1 hour
+
+test:
+  stage: test
+  script:
+    - npm ci
+    - npm ci --prefix examples/vue
+    - npx gulp build
+    # compare-heights.js (test:demo-sync) needs the demo server on :3000
+    - npx gulp serve >server.log 2>&1 &
+    - |
+      for i in $(seq 1 60); do
+        curl -sf http://localhost:3000/index.html >/dev/null && break
+        sleep 1
+      done
+      curl -sf http://localhost:3000/vue.html >/dev/null
+    - npm run release:check
+  artifacts:
+    when: on_failure
+    paths:
+      - screenshots/
+      - server.log
+    expire_in: 1 week
\ No newline at end of file
diff --git a/package.json b/package.json
index e7d4db2..a26f172 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,8 @@
     "build:example:vue": "npm --prefix examples/vue run build",
     "build:vue": "gulp vue",
     "dev": "gulp serve",
-    "release:check": "npm run test:vue-adapter && npm run test:vue-package",
+    "release:check": "npm run test:vue-adapter && npm run test:vue-package && npm run test:demo-sync",
+    "test:demo-sync": "node compare-heights.js",
     "start": "gulp serve",
     "test:vue-adapter": "npm run build:vue && npm run build:example:vue",
     "test:vue-package": "node scripts/vue-package-smoke.mjs"