ci.yml

name: CI

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

# Strip default permissions; jobs request what they need explicitly.
permissions:
  contents: read

concurrency:
  group: ${{ github.workflow }}-${{ github.event.number || github.ref }}
  cancel-in-progress: true

jobs:
  check:
    name: Lint + format
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install pnpm
        uses: pnpm/action-setup@v4
        with:
          run_install: false

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version-file: ".nvmrc"
          cache: "pnpm"

      # `--frozen-lockfile` will fail the build if pnpm-lock.yaml drifts
      # from the resolution of declared deps. That's the contract —
      # every PR must come with a lockfile that satisfies its
      # package.json changes; we don't accept silent dep updates from CI.
      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      # oxlint is the lint gate — fast, Rust-based, no per-rule config
      # by default. Catches dead imports, unused vars, suspect JSX,
      # missing keys, etc. without the eslint config-soup. Configure
      # via .oxlintrc.json if rule overrides are needed.
      - name: Lint
        run: pnpm lint

      # oxfmt is the formatting gate. `--check` exits non-zero if any
      # file would be rewritten — that's what we want CI to enforce.
      # Run `pnpm format` locally to auto-fix.
      - name: Format check
        run: pnpm format:check

  changeset-status:
    name: Changeset present
    runs-on: ubuntu-latest
    # Only on PRs — main branch pushes don't need this gate.
    if: github.event_name == 'pull_request'
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Install pnpm
        uses: pnpm/action-setup@v4
        with:
          run_install: false

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version-file: ".nvmrc"
          cache: "pnpm"

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      # `changeset status --since` exits 0 if the PR has a changeset OR
      # if no changesets are needed (only ignored packages changed).
      # Exits non-zero otherwise. We let it fail loud — adds a CI gate
      # on "did you add a changeset?" without commenting on the PR.
      - name: Verify changeset
        run: pnpm changeset status --since=origin/${{ github.base_ref }}