test-driven-development

Guide the red-green-refactor TDD cycle for behavior-driven development.

14|5|Updated Jan 29, 2026

Search Tags:#code quality #testing #tdd #refactoring #software design #agile

Ready to run

npx skills add https://github.com/oakoss/agent-skills --skill test-driven-development-oakoss

💬 Prompt for ChatGPT / Claude Chat▼

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

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps developers write more robust, maintainable, and well-designed code by adhering to the Test-Driven Development (TDD) methodology. It guides users through the red-green-refactor cycle to ensure code quality and correctness from the outset.

Core Features & Use Cases

TDD Cycle Guidance: Provides clear steps for the red, green, and refactor phases.
Principle Reinforcement: Outlines key TDD principles like "one test at a time" and "behavior over implementation."
Use Case: When starting a new feature, use this Skill to ensure each piece of functionality is built with a corresponding test, leading to fewer bugs and a more confident codebase.

Quick Start

Follow the red-green-refactor cycle to implement the next behavior for the current feature.

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 using Test-Driven Development for a new feature?▼

Start Test-Driven Development by following the red-green-refactor cycle to implement the next behavior for your current feature. Write a failing test, write the minimum code to pass it, and then refactor for better software design.

What are the core principles of TDD I should follow?▼

Core TDD principles include writing one test at a time and focusing on behavior over implementation. Reinforcing these principles ensures you build robust, maintainable code with correctness established from the outset.

How does the red-green-refactor cycle improve code quality?▼

The red-green-refactor cycle improves code quality by ensuring every piece of functionality has a corresponding test. This behavior-driven development approach leads to fewer bugs and a more confident codebase.

When should I use TDD instead of writing tests after the code?▼

Use TDD when starting a new feature to ensure each piece of functionality is built with a corresponding test. This behavior-driven approach guarantees testability and correctness from the outset, rather than retrofitting tests later.

What are common mistakes to avoid during TDD?▼

Common TDD mistakes include testing implementation details instead of behavior and writing multiple tests simultaneously. Adhering strictly to the one-test-at-a-time principle and focusing on behavior-driven development prevents these errors.