When to Use
Use this skill when:
- Adding new behavior
- Fixing a bug
- Refactoring logic with branch complexity
TDD Loop
- Write a failing test for the target behavior.
- Implement the smallest code to pass.
- Refactor while keeping tests green.
- Add edge/error-path tests before closing.
Coverage Rules
- Cover happy path + error paths + edge cases.
- Prefer deterministic tests over flaky integration paths.
- Add seams only when branches are impossible to trigger naturally.
- Keep runtime behavior unchanged when adding seams.
Validation Commands
Run:
go test ./...
go test -cover ./...Report package coverage and total coverage in the PR.