diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..944cfbc
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,39 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    name: Build and test
+    runs-on: ${{ fromJSON(github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork && '["ubuntu-latest"]' || '["self-hosted","linux","x64","wan0-ci","thistle-tk"]') }}
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Install native build dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y build-essential libsdl2-dev pkg-config
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache Rust builds
+        uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: |
+            . -> target
+            compiler -> target
+
+      - name: Test toolkit
+        run: cargo test --locked --all-targets
+
+      - name: Test compiler units
+        run: cargo test --manifest-path compiler/Cargo.toml --locked --lib --bins