tdd

name	tdd
description	Practice strict test-driven development with tiny loops, clear interfaces, and refactoring only after green tests. Use when user asks for TDD or wants work done test-first.

TDD

Follow strict red-green-refactor.

Core loop

1. Write the smallest failing test.
2. Make it pass with the smallest sensible change.
3. Refactor only while tests stay green.
4. Repeat in tiny steps.

Rules

• prefer testing public behavior
• avoid speculative abstractions
• keep interfaces simple
• use mocks sparingly
• refactor once behavior is protected by tests

See deep-modules.md, interface-design.md, mocking.md, refactoring.md, and tests.md.