TDD Intelligence

True test-driven development with agentic discipline.

Core Loop

1. Understand the desired behavior (read existing code, docs, issues).
2. Write the smallest failing test (or characterization test for legacy) that expresses the goal.
   • Run the test and confirm it fails for the right reason.
3. Implement the minimal code to make the test pass.
4. Refactor for cleanliness while keeping tests green.
5. Add any additional edge-case or regression tests suggested by the implementation.
6. Verify the full relevant test suite still passes.

For Refactors and Legacy Code

• First write characterization tests that lock in current (even if imperfect) behavior.
• Then change implementation.
• Confirm the characterization tests still pass (proving behavior preservation).