test-driven-development

Guide software development through the Red-Green-Refactor cycle.

1|Updated Feb 24, 2026

Search Tags:#code quality #testing #tdd #debugging #refactoring #software development

Ready to run

npx skills add https://github.com/FacuM/yolo-agent --skill test-driven-development-facum

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/FacuM/yolo-agent/tree/main/.claude/skills/test-driven-development
Command: npx skills add https://github.com/FacuM/yolo-agent --skill test-driven-development-facum

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill enforces a rigorous Test-Driven Development (TDD) methodology to ensure code quality, prevent regressions, and build robust software by writing tests before implementation.

Core Features & Use Cases

Enforces TDD Cycle: Guides users through the Red-Green-Refactor loop.
Prevents Common Pitfalls: Identifies and warns against TDD rationalizations and anti-patterns.
Use Case: When starting a new feature, use this Skill to ensure you write a failing test first, then minimal code to pass, and finally refactor, guaranteeing the code is well-tested and meets requirements.

Quick Start

Follow the TDD cycle to implement the new feature, starting with a failing test.

Frequently Asked Questions about test-driven-development

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I start writing code using the test-driven development cycle?▼

To practice test-driven development, you begin by writing a failing test for the new feature, implement the minimal code required to pass that test, and then refactor the implementation while ensuring the test stays green.

What are common anti-patterns to avoid when doing TDD?▼

Common TDD anti-patterns include writing implementation code before tests, skipping the refactoring step, and rationalizing insufficient test coverage, all of which undermine code quality and increase the risk of regressions.

Why does writing failing tests before implementation improve code quality?▼

Writing failing tests before implementation improves code quality by enforcing a Red-Green-Refactor loop that ensures every piece of code is purpose-built to meet requirements and is continuously validated against regressions.

Does test-driven development help with debugging and refactoring existing software?▼

Yes, test-driven development significantly aids debugging and refactoring by establishing a comprehensive test suite that catches regressions immediately when modifying existing software code.

What is the best way to prevent regressions when building a new software feature?▼

The best way to prevent regressions when building a new software feature is to rigorously follow the TDD methodology, writing failing tests first to validate requirements before writing the actual implementation code.