Why does this skill mandate deleting code written before tests?

The skill follows the 'Iron Law' of TDD: production code written before a test is considered technical debt. Deleting it ensures the final implementation is truly driven by requirements and verified by the test suite.

How does the Red-Green-Refactor cycle work in Claude Code?

Claude first writes a failing test (Red), verifies the failure message, writes the minimum code necessary to pass (Green), verifies the pass, and then cleans up the implementation (Refactor).

When should I avoid using the TDD skill?

While TDD is recommended for most tasks, you may ask your human partner for exceptions during throwaway prototyping, generating boilerplate, or editing configuration files.

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 invalid. The skill requires you to fix the test so it fails correctly before proceeding.

Test-Driven Development (TDD) Workflow

Name: Test-Driven Development (TDD) Workflow
Author: zhengxuyu

byzhengxuyu

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安全与测试

Enforces a strict Red-Green-Refactor cycle to ensure code reliability and high-quality software design.

The Test-Driven Development (TDD) skill transforms Claude into a disciplined developer that adheres to the 'Iron Law': no production code is written without a preceding failing test. By mandating the Red-Green-Refactor cycle, this skill helps developers eliminate technical debt, prevent regressions, and improve code architecture through behavioral discovery rather than implementation-first coding. It is ideal for teams seeking high confidence in their deployments and clear documentation of their codebase's intended behavior.

主要功能

01Strict Red-Green-Refactor cycle enforcement

02Mandatory verification of test failures to prevent false positives

030 GitHub stars

04Dedicated refactoring step to clean code without changing behavior

05Automatic detection and prevention of 'test-after' anti-patterns

06Minimalist production code implementation to satisfy specific tests

使用场景

01Safe refactoring of complex legacy codebases

02Systematic bug fixing with regression prevention

03Implementing new features with high test coverage

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add zhengxuyu/claude-superpowers test-driven-development

For use in Claude.ai and ChatGPT

主要功能

01Strict Red-Green-Refactor cycle enforcement

02Mandatory verification of test failures to prevent false positives

030 GitHub stars

04Dedicated refactoring step to clean code without changing behavior

05Automatic detection and prevention of 'test-after' anti-patterns

06Minimalist production code implementation to satisfy specific tests

使用场景

01Safe refactoring of complex legacy codebases

02Systematic bug fixing with regression prevention

03Implementing new features with high test coverage

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add zhengxuyu/claude-superpowers test-driven-development

For use in Claude.ai and ChatGPT