copilot-tdd-harness

Runs the expected verification command for a TDD step, compares the observed result with the declared expectation, and reverts only the scoped changes when verification disproves the step.

Plans the next concrete behavior for TDD before RED begins. Use when a task is broad, ambiguous, or needs to be decomposed into the smallest falsifiable next slice with edge cases considered first.

Configure TDD harness for this project. Uses exemplar test and production code plus LLM analysis to extract project patterns, then interviews you to fill any gaps. Generates .github/instructions/tdd-patterns.instructions.md and stage-specific pattern assets.

Helps a user break down a broad or ambiguous requirement into concrete, testable behaviors.

Enforces a strict Red-Green-Refactor-Commit TDD workflow. Use when making any code changes or adding behavior. Guides the RED→GREEN→COMMIT→REFACTOR cycle with one-test-per-cycle discipline, edge-case-first ordering, and minimal green implementations.