name: Tier 1 — Smoke (macOS-ARM)

on:
  push:
    branches: [main]
  pull_request:
    # Gate behind the run-tier1 label too, so external PRs that touch
    # only docs don't burn a minute of macOS-ARM time. Maintainers can
    # always re-run via the run-tier1 label.
    types: [opened, synchronize, reopened, labeled]

jobs:
  smoke:
    if: |
      github.event_name == 'push' ||
      github.event.action != 'labeled' ||
      contains(github.event.pull_request.labels.*.name, 'run-tier1')
    runs-on: macos-14  # M1, Apple Silicon hosted runner
    timeout-minutes: 20
    steps:
      - uses: actions/checkout@v4

      - uses: astral-sh/setup-uv@v3
        with:
          enable-cache: true

      - name: uv sync
        run: uv sync --no-install-project

      - name: Run Tier 1 (synthetic micro-UNet smoke)
        run: uv run pytest -m smoke tests/ -v