tdd-workflow

Test-driven development with red-green-refactor means writing failing tests first, then implementing minimal code to pass them, then refactoring. This Skill guides you through each phase—writing specs, creating failing pytest tests, coding the minimal solution, verifying all tests pass, and documenting changes in your Python project.

Yes. This Skill works with Python projects using pytest, test directories, and virtual environments (.venv). It guides developers through the complete TDD cycle: reading specifications, writing failing tests, implementing code, running the test suite, and verifying all tests pass.

Test-first development means writing failing tests that specify behavior before implementation. This Skill walks you through creating pytest tests from specifications, then building minimal code to satisfy them, ensuring your implementation matches requirements from the start.

After implementing changes, run your pytest test suite to verify all tests pass. This Skill includes a verify gate that checks your entire test suite, ensuring your changes work correctly and catch regressions before you document and commit.

TDD applies to both. Write a failing test that reproduces the bug, implement the minimal fix, verify tests pass, then refactor. This Skill supports the red-green-refactor cycle for bug fixes using the same pytest workflow and verify gate as feature development.