Why is the REFACTOR phase important?

Refactoring allows you to improve code quality, remove duplication, and simplify logic while the tests are 'Green,' ensuring that your clean-up doesn't break existing functionality.

How does the RED phase verify a test is valid?

The RED phase requires running the test and confirming it fails for the specific expected reason, such as a missing function or incorrect return value, rather than a syntax error.

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

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

Can I write tests after the implementation is finished?

No. This skill strictly enforces writing tests first. Tests written after implementation are often biased and fail to prove the code's correctness as effectively as TDD.

Test-Driven Development (TDD)

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

bybostonaholic

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セキュリティとテスト

Enforces a rigorous Red-Green-Refactor methodology to ensure code correctness through disciplined test-first development.

This skill implements a strict Test-Driven Development (TDD) workflow within the Research-Plan-Implement (RPI) framework, mandating that every line of production code is preceded by a failing test. It guides the developer through the essential Red-Green-Refactor cycle, ensuring that tests are meaningful and that code remains minimal, maintainable, and verified. By adhering to 'The Iron Law'—no production code without a failing test—this skill eliminates common pitfalls like after-the-fact testing and over-engineering, resulting in higher quality software and fewer regressions.

主な機能

01Mandatory failure verification to prevent false positives

02Comprehensive rejection of common testing rationalizations

03Systematic refactoring guidance with regression checking

04Minimalist coding principles to satisfy tests efficiently

052 GitHub stars

06Strict Red-Green-Refactor cycle enforcement

ユースケース

01Implementing new features with guaranteed 100% test coverage

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

03Safely refactoring legacy codebases using a test-first approach

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add bostonaholic/rpikit test-driven-development

For use in Claude.ai and ChatGPT

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