name: CI

on:
  push:
    branches: [main]
  pull_request:

jobs:
  quality:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: npm

      - name: Install dependencies
        run: npm ci

      - name: Unit tests
        run: npx jest --ci

      - name: Typecheck
        run: npx tsc --noEmit

      # Errors are blocking; style warnings are still being burned down.
      # Tighten to --max-warnings=0 once `npx eslint .` exits 0 on main.
      - name: Lint
        run: npx eslint . --quiet