When can I skip the TDD process?

Exceptions are only permitted for throwaway prototypes, generated code, or configuration files, and usually require explicit permission from the human partner.

What is the 'Iron Law' in this Claude Code skill?

The Iron Law mandates that no production code is written without a failing test first. If production code is written before a test, it must be deleted and restarted from the test-first phase.

How does the Red-Green-Refactor cycle work here?

You first write a failing test (Red), write the absolute minimum code required to pass that test (Green), and then clean up the implementation (Refactor) while keeping tests passing.

Does this skill support bug fixing?

Yes, it requires writing a failing test that reproduces the bug before any fix is implemented, ensuring the fix is verified and preventing future regressions.

Test-Driven Development

Name: Test-Driven Development
Author: noeljackson

bynoeljackson

0•

Security & Testing

Enforces a strict Red-Green-Refactor workflow by requiring failing tests before any production code is implemented.

This skill transforms Claude into a disciplined TDD practitioner, adhering to the 'Iron Law' of writing failing tests before any production code. It guides the AI through the rigorous Red-Green-Refactor cycle, ensuring that every feature, bug fix, or refactor is backed by automated tests that prove behavior and prevent regressions. By emphasizing minimal code implementation and discouraging over-engineering, it helps maintain high code quality and reduces technical debt across any software project.

Key Features

010 GitHub stars

02Provides guidance on refactoring while maintaining green status

03Prioritizes minimal, functional code to satisfy test requirements

04Prevents common shortcuts and rationalizations that compromise code quality

05Requires verification of failing tests before implementation starts

06Enforces the mandatory Red-Green-Refactor development cycle

Use Cases

01Fixing bugs by reproducing them with a failing test case first

02Developing new features with built-in documentation and high confidence

03Safe refactoring of legacy code by establishing a comprehensive test safety net

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add noeljackson/agentic test-driven-development

For use in Claude.ai and ChatGPT

Key Features

010 GitHub stars

02Provides guidance on refactoring while maintaining green status

03Prioritizes minimal, functional code to satisfy test requirements

04Prevents common shortcuts and rationalizations that compromise code quality

05Requires verification of failing tests before implementation starts

06Enforces the mandatory Red-Green-Refactor development cycle

Use Cases

01Fixing bugs by reproducing them with a failing test case first

02Developing new features with built-in documentation and high confidence

03Safe refactoring of legacy code by establishing a comprehensive test safety net

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add noeljackson/agentic test-driven-development

For use in Claude.ai and ChatGPT