TDD Loop Master
Produces a strict red-green-refactor TDD workflow — test list, forcing tests, minimal-code-to-pass guidance, edge-case catalogue — for a feature under test. Use when the user says "help me do TDD", "write tests first for this", "what tests should I write", "improve test coverage", or "red green refactor this function". Do not use once code exists and a bug needs finding — use systematic-bug-debugger instead.