contract-drift.yml

name: Contract Drift Check

on:
  pull_request:
    branches: [main]
  push:
    branches: [main]

jobs:
  drift-check:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: npm
      - run: npm ci
      - name: Regenerate contracts from OpenAPI spec
        run: npm run codegen
      - name: Check for contract drift
        run: |
          if ! git diff --exit-code src/generated/types.ts; then
            echo ""
            echo "❌ CONTRACT DRIFT DETECTED"
            echo ""
            echo "The generated types in src/generated/types.ts differ from what the"
            echo "current OpenAPI spec would produce. This means either:"
            echo "  1. The spec was updated but codegen was not re-run, or"
            echo "  2. src/generated/types.ts was manually edited (do not do this)"
            echo ""
            echo "Fix: run 'npm run codegen' and commit the updated file."
            echo "See CODEGEN.md for details."
            exit 1
          fi
          echo "✅ No contract drift detected"