TDD Skill

Write the test. Watch it fail. Make it pass. Clean up. Repeat.

The Iron Law

NO PRODUCTION CODE WITHOUT A FAILING TEST FIRST

If you're writing production code and no test just failed, you're doing it wrong.

When to Apply

• OMC_TDD_MODE is enabled (guided or enforced)
• Implementing a new feature or behavior
• Fixing a bug (write the test that reproduces it first)
• Unsure how to structure tests for a piece of logic
• When the tdd_enforcer hook blocks an edit

Red-Green-Refactor Cycle