CI Local

Reproduce a GitHub Actions run on the local machine. The workflow YAML is the spec: read it, don't guess at what "the lint step" or "the test step" means.

Scope

GitHub Actions only (.github/workflows/*.yml). If the repo uses GitLab CI, CircleCI, or Jenkins instead, say so and stop: no translation layer exists for those yet (add one if it comes up twice, not speculatively).

Phase 1: Find the merge-gating jobs