diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..679e46e
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,38 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: astral-sh/setup-uv@v6
+      - run: uv sync
+      - run: uv run prek run --all-files --show-diff-on-failure
+
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: astral-sh/setup-uv@v6
+        with:
+          python-version: ${{ matrix.python }}
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+      - uses: actions/cache@v4
+        with:
+          path: ~/.cache/pqcli/pq-web
+          key: pq-web-${{ hashFiles('tests/upstream/fetch.py') }}
+      # The upstream comparison tests skip themselves if this fails, for
+      # example while progressquest.com is down.
+      - run: uv run python tests/upstream/fetch.py || true
+      - run: uv run pytest -q