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

The Iron Law states that no production code may be written without a failing test first. If code is written before a test, it must be deleted and rewritten following the TDD cycle.

How does this skill handle bug fixes?

It requires writing a failing test that reproduces the reported bug before any fix is implemented, ensuring the bug is truly understood and fixed permanently.

Why is 'Verify RED' mandatory?

Watching a test fail confirms that the test is actually checking the intended behavior and ensures it doesn't pass accidentally due to environmental factors or incorrect logic.

Can I use this skill for refactoring existing code?

Yes. The skill provides a specific 'Refactor' phase after the code is Green, allowing you to clean up implementation details while ensuring all tests remain passing.

Does this skill work with all programming languages?

Yes, it is a process-oriented skill that applies the TDD methodology regardless of the underlying language or testing framework being used.

Test-Driven Development (TDD)

Name: Test-Driven Development (TDD)
Author: SwervoJake

bySwervoJake

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Seguridad y Pruebas

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

The Test-Driven Development (TDD) skill for Claude Code establishes a rigorous framework for software quality by mandating the 'Iron Law': no production code is written without a preceding failing test. It guides the AI through the complete TDD lifecycle—writing a minimal test, verifying the failure, implementing the simplest possible solution to pass, and refactoring for clean architecture. This skill is indispensable for teams prioritizing long-term maintainability, as it prevents technical debt, eliminates over-engineering, and ensures that every feature or bug fix is backed by a reliable automated test suite.

Características Principales

01Automatic protocols for deleting unverified production code

02Strict Red-Green-Refactor cycle enforcement

030 GitHub stars

04Comprehensive guidelines for behavior-focused test naming and structure

05Mandatory 'Verify RED' stage to prevent false positives

06Minimalist code implementation logic to avoid over-engineering

Casos de Uso

01Implementing new features with a test-first architecture

02Safely refactoring complex logic with automated verification

03Reproducing and fixing bugs through regression testing

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add swervojake/claaaude-studio test-driven-development

For use in Claude.ai and ChatGPT

Características Principales

01Automatic protocols for deleting unverified production code

02Strict Red-Green-Refactor cycle enforcement

030 GitHub stars

04Comprehensive guidelines for behavior-focused test naming and structure

05Mandatory 'Verify RED' stage to prevent false positives

06Minimalist code implementation logic to avoid over-engineering

Casos de Uso

01Implementing new features with a test-first architecture

02Safely refactoring complex logic with automated verification

03Reproducing and fixing bugs through regression testing

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add swervojake/claaaude-studio test-driven-development

For use in Claude.ai and ChatGPT