How does this skill handle bug fixes?

For every bug fix, the skill requires writing a test that reproduces the bug. This proves the fix works and ensures the bug never returns as a regression.

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

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

When should I skip TDD according to this skill?

Exceptions are rare and usually reserved for throwaway prototypes, generated code, or simple configuration files, and should be discussed with a human partner.

Why does the skill insist on watching a test fail first?

Watching a test fail (the RED phase) confirms that the test is actually checking the intended behavior and is not passing by accident or testing the wrong logic.

Test-Driven Development (TDD) Mastery

Name: Test-Driven Development (TDD) Mastery
Author: clsandoval

byclsandoval

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보안 및 테스팅

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 disciplined TDD practitioner, mandating the 'Iron Law' of writing a failing test before any production code is authored. It guides the AI through the complete Red-Green-Refactor cycle—writing a minimal failing test, implementing just enough code to pass, and then refactoring for quality—ensuring that every feature or bug fix is behavior-driven and fully verified. This approach prevents over-engineering, reduces technical debt, and creates a self-documenting codebase where every line of code serves a proven purpose.

주요 기능

01Mandatory 'Verify RED' step to ensure tests fail for the correct reasons

02Strict enforcement of the Red-Green-Refactor development cycle

03Comprehensive validation checklist for feature completion

04Minimalist implementation guidance to prevent YAGNI and over-engineering

050 GitHub stars

06Reproducible bug-fixing workflows through initial test failure

사용 사례

01Implementing new features with a behavior-first, verified approach

02Safe refactoring of complex logic while maintaining a verified 'green' state

03Fixing software bugs by creating reproduction tests to prevent regressions

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add clsandoval/monorepo test-driven-development

For use in Claude.ai and ChatGPT

주요 기능

01Mandatory 'Verify RED' step to ensure tests fail for the correct reasons

02Strict enforcement of the Red-Green-Refactor development cycle

03Comprehensive validation checklist for feature completion

04Minimalist implementation guidance to prevent YAGNI and over-engineering

050 GitHub stars

06Reproducible bug-fixing workflows through initial test failure

사용 사례

01Implementing new features with a behavior-first, verified approach

02Safe refactoring of complex logic while maintaining a verified 'green' state

03Fixing software bugs by creating reproduction tests to prevent regressions

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add clsandoval/monorepo test-driven-development

For use in Claude.ai and ChatGPT