Name every phase: , , , . Finish with: , , (none or remaining edge).

Completion: every requested behavior has a passing check, the check ran in the repo's normal command, and any untestable edge is reported.

Prefer the highest-level test that proves the behaviour without brittle setup. HTTP paths: request/response tests. Service/repository: integration tests when practical. Go: table-driven with if project uses it. Keep mocks at boundaries. Do not mock what you can run cheaply. One -style self-check suffices for tiny cases.