diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..eba7c1e
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,64 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  CARGO_TERM_COLOR: always
+  RUSTFLAGS: -D warnings
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo test --all-targets
+
+  clippy:
+    name: Clippy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo clippy --all-targets -- -D warnings
+
+  rustfmt:
+    name: Rust Format
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt
+      - run: cargo fmt --all --check
+
+  rue:
+    name: Rue Format & Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+      - name: Install Rue
+        run: |
+          RUE_VERSION=$(sed -n 's/^version = "\(.*\)"/\1/p' Rue.toml)
+          cargo install rue-cli --version "$RUE_VERSION" --locked
+      - name: Check formatting
+        run: rue fmt --check
+      - name: Check compiled puzzles are up to date
+        run: |
+          rue build -a -s -x -h
+          git status --porcelain puzzles
+          test -z "$(git status --porcelain puzzles)"
diff --git a/README.md b/README.md
index 32c4ec3..280f814 100644
--- a/README.md
+++ b/README.md
@@ -85,7 +85,7 @@ The compiled puzzles are checked into the repository next to their sources (as `
 rue build -a -s -x -h
 ```
 
-CI should run the same command followed by `git diff --exit-code puzzles` to ensure that the compiled puzzles are up to date. Then run the tests with:
+CI runs the same command and fails if anything in `puzzles` changes, to ensure that the compiled puzzles are up to date. Then run the tests with:
 
 ```bash
 cargo test