diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..8f93587
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,42 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+    branches: [ main, master ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    strategy:
+      matrix:
+        python-version: ["3.11", "3.12", "3.13", "3.14"]
+    
+    steps:
+    - uses: actions/checkout@v4
+    
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+        allow-prereleases: true
+    
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+        pip install mypy ruff
+    
+    - name: Lint with ruff
+      run: |
+        ruff check winnowing tests
+    
+    - name: Type check with mypy
+      run: |
+        mypy winnowing --ignore-missing-imports
+    
+    - name: Test with pytest
+      run: |
+        pytest tests --cov winnowing --durations=10
diff --git a/.gitignore b/.gitignore
index 2f78cf5..7db1ef9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 *.pyc
+.coverage
 
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..ce488d8
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,7 @@
+[tool.ruff.lint]
+select = ["E", "F", "W", "I"]
+ignore = []
+
+# Allow star imports in test files
+[tool.ruff.lint.per-file-ignores]
+"tests/*" = ["F403", "F405"]