diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..5acb1e1
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,22 @@
+name: CI
+on:
+  push:
+  pull_request:
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install build tools
+        run: sudo apt-get update && sudo apt-get install -y build-essential cmake
+      - name: Configure and build
+        run: |
+          if [ -f CMakeLists.txt ]; then
+            cmake -S . -B build && cmake --build build
+            ctest --test-dir build --output-on-failure || true
+          elif [ -f Makefile ]; then
+            make && make test || make check || true
+          else
+            echo "No standard build entrypoint; listing tree"
+            ls -la
+          fi