diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..36bcd890
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,73 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            arch: x86_64
+          - os: ubuntu-latest
+            arch: aarch64
+          - os: macos-latest
+    
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install Rust
+      uses: dtolnay/rust-toolchain@stable
+
+    - name: Set up QEMU (for aarch64 on Linux)
+      if: matrix.arch == 'aarch64' && runner.os == 'Linux'
+      uses: docker/setup-qemu-action@v3
+
+    - name: Cache cargo
+      uses: actions/cache@v4
+      with:
+        path: |
+          ~/.cargo/registry
+          ~/.cargo/git
+          target
+        key: ${{ runner.os }}-${{ matrix.arch || 'x86_64' }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
+    - name: Install system dependencies (Ubuntu)
+      if: runner.os == 'Linux' && matrix.arch != 'aarch64'
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y libx11-dev libxdo-dev libxcb-shape0-dev libxcb-xfixes0-dev libxtst-dev
+
+    - name: Build and test (Linux aarch64)
+      if: matrix.arch == 'aarch64' && runner.os == 'Linux'
+      uses: uraimo/run-on-arch-action@v2
+      with:
+        arch: aarch64
+        distro: ubuntu22.04
+        install: |
+          apt-get update
+          apt-get install -y curl build-essential libx11-dev libxdo-dev libxcb-shape0-dev libxcb-xfixes0-dev libxtst-dev
+          curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+        run: |
+          . $HOME/.cargo/env
+          cargo build --workspace --exclude g3-computer-control
+          cargo test --workspace --exclude g3-computer-control --lib --tests
+
+    - name: Build (Linux x86_64)
+      if: matrix.arch != 'aarch64' && runner.os == 'Linux'
+      run: cargo build --workspace --exclude g3-computer-control
+
+    - name: Run tests (Linux x86_64)
+      if: matrix.arch != 'aarch64' && runner.os == 'Linux'
+      run: cargo test --workspace --exclude g3-computer-control --lib --tests
+
+    - name: Build (macOS)
+      if: runner.os == 'macOS'
+      run: cargo build --workspace
+
+    - name: Run tests (macOS)
+      if: runner.os == 'macOS'
+      run: cargo test --workspace --lib --tests