What is the 'Iron Law' in this TDD skill?

The Iron Law dictates that no production code should be written without a failing test first; if code is written beforehand, it must be deleted and restarted from the test to ensure the test is actually verifying the logic.

What happens if a test passes immediately during the Red phase?

If a test passes immediately, it indicates you are testing existing behavior or the test is flawed. The skill requires you to fix the test so it fails for the right reason before moving to the implementation phase.

Does this skill support bug fixing?

Yes, it mandates writing a failing test that reproduces the bug before any fix is implemented to ensure the issue is resolved correctly and won't regress in the future.

Can I use mocks with this TDD skill?

The skill encourages testing real behavior and suggests avoiding mocks unless they are absolutely unavoidable, ensuring that you are testing the code's logic rather than the mock's configuration.

Test-Driven Development (TDD) Superpowers

Name: Test-Driven Development (TDD) Superpowers
Author: tianyuanztm

bytianyuanztm

0•

Seguridad y Pruebas

Enforces a strict Red-Green-Refactor workflow to ensure all production code is verified by failing tests before implementation.

This skill transforms Claude into a rigorous TDD practitioner, mandating the 'Iron Law' of writing failing tests before any production code. It provides a structured framework for the Red-Green-Refactor cycle, helps identify and avoid common TDD rationalizations, and ensures that every new feature or bug fix is backed by reliable, automated tests. By focusing on minimal implementation and clear test intent, it improves code quality, reduces technical debt, and prevents regressions in complex codebases through systematic, behavior-driven development.

Características Principales

01Guidance on writing minimal, high-quality test cases

020 GitHub stars

03Strict Red-Green-Refactor cycle enforcement

04Automated verification checklists for features and bug fixes

05Iron Law compliance (failing test first or delete code)

06Detection and prevention of common TDD anti-patterns

Casos de Uso

01Fixing bugs by reproducing them with failing tests first

02Implementing new features with high confidence and zero regressions

03Refactoring legacy codebases by establishing a baseline of verified behavior

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add tianyuanztm/myplan test-driven-development

For use in Claude.ai and ChatGPT

Características Principales

01Guidance on writing minimal, high-quality test cases

020 GitHub stars

03Strict Red-Green-Refactor cycle enforcement

04Automated verification checklists for features and bug fixes

05Iron Law compliance (failing test first or delete code)

06Detection and prevention of common TDD anti-patterns

Casos de Uso

01Fixing bugs by reproducing them with failing tests first

02Implementing new features with high confidence and zero regressions

03Refactoring legacy codebases by establishing a baseline of verified behavior

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add tianyuanztm/myplan test-driven-development

For use in Claude.ai and ChatGPT