Build features with tests that survive refactors.
Guides test-first implementation so features and bug fixes gain behavior-focused tests that survive internal changes.
When to use it
Use when building features or fixing bugs test-first, when the user mentions red-green-refactor, or when they want integration tests.
It changes how the agent implements features and fixes bugs by requiring failing tests first and one minimal implementation per cycle.
What you provide
No setup requirements listed.
No additional actions listed.