What is the core rule of the TDD skill?

The core principle is that every single line of production code must be written in response to a failing test. If there is no failing test, no production code is written.

Does it focus on implementation or behavior?

It focuses strictly on behavior. Tests are designed to verify business outcomes through public APIs rather than checking internal implementation details or private methods.

How does this skill handle test data?

It advocates for the use of factory functions over 'let' or 'beforeEach' blocks to ensure test isolation, reduce shared state, and improve readability.

When should I refactor according to this skill?

Refactoring occurs only after tests are green. You must commit the working code first, then refactor while keeping the external API unchanged and all tests passing.

Test-Driven Development (TDD) Specialist

Name: Test-Driven Development (TDD) Specialist
Author: mintuz

bymintuz

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Seguridad y Pruebas

Enforces the Red-Green-Refactor cycle to ensure production code is only written in response to failing behavioral tests.

This skill transforms Claude into a disciplined TDD practitioner, guiding the development process through the rigorous Red-Green-Refactor cycle. It prioritizes behavior-driven testing over implementation details, utilizing factory patterns for test data and ensuring high-quality code through business logic verification. By providing strict quality gates and decision trees, it prevents common pitfalls such as speculative coding, testing private methods, or using brittle setup patterns, resulting in a robust and maintainable codebase.

Características Principales

01Strict Red-Green-Refactor workflow enforcement

02Test data management using factory patterns

03Behavior-focused testing via public APIs

0414 GitHub stars

05Comprehensive refactoring assessment guides

06Quality gate checklists for clean code commits

Casos de Uso

01Standardizing testing patterns across web and iOS development projects

02Safely refactoring complex logic while maintaining API stability

03Building mission-critical features with 100% behavioral test coverage

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add mintuz/claude-plugins tdd

For use in Claude.ai and ChatGPT

Download Skill