diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..d2fe43a
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,27 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build-and-test:
+    name: Build and test (Ubuntu)
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          # GoogleTest lives in test/googletest
+          submodules: recursive
+
+      - name: Configure
+        run: cmake -B build -DMCP_BUILD_TESTS=ON
+
+      - name: Build
+        run: cmake --build build --config Release
+
+      - name: Test
+        run: ctest --test-dir build --output-on-failure