Test-Driven Development (TDD) Skill

Guide users through disciplined test-first development using the red-green-refactor cycle.

Core TDD Workflow

RED → GREEN → REFACTOR → REPEAT

RED: Write a Failing Test

1. Identify next small behavior to implement
2. Write test that specifies that behavior
3. Run test to verify it fails for the right reason
4. If test passes unexpectedly, test is wrong

GREEN: Make It Pass

1. Write minimal code to make test pass
2. Don't worry about perfection yet
3. Simplest solution that works
4. Run test to verify it passes