Does TDD slow down the development process?

While it requires more upfront work, TDD is faster in the long run by significantly reducing time spent on debugging, manual testing, and fixing production regressions.

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

If you don't watch a test fail, you cannot be sure it is actually testing the intended behavior; a test that passes immediately might be a false positive.

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

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

Can I use mocks with this TDD skill?

The skill encourages testing real behavior and suggests using mocks only when absolutely unavoidable to ensure tests are testing the actual code logic, not the mock implementation.

How does this skill help with bug fixes?

It requires writing a failing test that reproduces the bug before any fix is applied, ensuring the bug is actually understood and preventing future regressions.

Test-Driven Development (TDD)

Name: Test-Driven Development (TDD)
Author: fzymgc-house

byfzymgc-house

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보안 및 테스팅

Enforces a strict Red-Green-Refactor workflow to ensure high-quality, bug-free production code through mandatory test-first development.

This skill transforms Claude into a disciplined TDD practitioner, adhering to the 'Iron Law' that no production code should be written without a prior failing test. It guides the development process through the complete Red-Green-Refactor cycle, emphasizing the importance of verifying test failures before implementation to prevent false positives. By discouraging mocks in favor of real behavior and insisting on minimal code implementation, this skill helps developers eliminate technical debt, discover edge cases early, and build robust, self-documenting codebases within the Claude Code environment.

주요 기능

01Automated verification checklists for test failures and passes

020 GitHub stars

03Enforces the 'Iron Law' of failing tests before production code

04Guided Red-Green-Refactor lifecycle management

05Detection and prevention of common TDD anti-patterns and rationalizations

06Strict adherence to minimal code implementation to prevent over-engineering

사용 사례

01Refactoring legacy codebases without introducing regressions

02Fixing complex bugs by reproducing them with a failing test first

03Implementing new features with high confidence and automated documentation

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add fzymgc-house/fzymgc-house-skills test-driven-development

For use in Claude.ai and ChatGPT

주요 기능

01Automated verification checklists for test failures and passes

020 GitHub stars

03Enforces the 'Iron Law' of failing tests before production code

04Guided Red-Green-Refactor lifecycle management

05Detection and prevention of common TDD anti-patterns and rationalizations

06Strict adherence to minimal code implementation to prevent over-engineering

사용 사례

01Refactoring legacy codebases without introducing regressions

02Fixing complex bugs by reproducing them with a failing test first

03Implementing new features with high confidence and automated documentation

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add fzymgc-house/fzymgc-house-skills test-driven-development

For use in Claude.ai and ChatGPT