hal-harness

Analyze a PR diff against main and produce a minimal Sandi Metz-style test map. Use when you need to decide what to test before writing any tests. Identifies only public incoming queries and commands; explicitly skips private methods, outgoing queries, and internal state.

Write minimal, behavior-focused tests for the current PR based on a Minimal Test Map. Use after running the test-plan skill (or when you already have a clear map of what to test). Follows Sandi Metz's 99 Bottles philosophy: test public interfaces, assert observable behavior, mock only outgoing commands.