You can kick off Magnitude tests from GitHub actions by:
  1. Ensuring that your development server is accessible in the test runner
  2. Ensuring magnitude-test gets installed on the test runner
  3. Running the appropriate npx magnitude CLI command
  4. Including the appropriate LLM client credentials
Here’s an example .githhub/workflows/magnitude.yaml, from our our example repo: 
name: Run Magnitude Tests
on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]
jobs:
  test:
    runs-on: ubuntu-latest
    env:
      ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
    steps:
      - uses: actions/checkout@v4
      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '22'
          cache: 'npm'
      - name: Install dependencies
        run: npm ci
      - name: Install playwright
        run: npx playwright install chromium
      - name: Start development server
        run: npm run dev &
      - name: Wait for server to start
        run: sleep 5
      - name: Run tests with Xvfb
        uses: GabrielBB/xvfb-action@v1
        with:
          run: npx magnitude -p