test-driven-development

Enforce red-green-refactoring cycles by writing tests before implementation code.

Updated Jun 11, 2026

Search Tags:#code quality #best practices #TDD #software development #test-first coding

Ready to run

npx skills add https://github.com/26mitch26/ai-mall --skill test-driven-development-26mitch26

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/26mitch26/ai-mall/tree/main/.claude/skills/test-driven-development
Command: npx skills add https://github.com/26mitch26/ai-mall --skill test-driven-development-26mitch26

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

The Skill solves the challenge of creating reliable and maintainable code by promoting effective and structured test-driven development (TDD) practices.

Core Features & Use Cases

Test Creation and Verification: Encourages writing tests before the implementation code to ensure the functionality works as expected.
Red-Green-Refactoring: Provides a clear framework to start with a failing test, write just enough code to pass it, and then refactor to clean up the codebase.
Prevent Regression: Ensures that code changes do not inadvertently introduce new bugs.
Code Confidence: By testing code first, it reduces the uncertainty around its behavior and quality.

Quick Start

Implement new feature 'add item to cart' with test-driven development by starting with a failing test 'cannot add item to cart', then write minimal code to pass 'adds item to cart', and finally refactor to improve 'code quality and test efficiency'.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema

What is test-driven development and how does it improve code quality?▼

Test-driven development improves code quality by enforcing a test-first coding practice where you write tests before implementation code. This ensures robust codebase behavior, prevents regression, and reduces uncertainty around functionality.

How do I implement a new feature using the red-green-refactoring cycle?▼

Implement a feature using red-green-refactoring by first writing a failing test, then writing minimal implementation code to pass the test, and finally refactoring to improve code quality and test efficiency. This enforces structured TDD cycles.

When should I use test-first coding practices in software development?▼

Use test-first coding practices when creating, debugging, and iterating over code to prevent regression and ensure robust codebase behavior. It is applicable across all software engineering roles focused on maximizing software quality.

Does test-driven development help prevent regression bugs when iterating over code?▼

Yes, test-driven development prevents regression bugs by ensuring code changes do not inadvertently introduce new bugs. By testing code first, it builds code confidence and reduces uncertainty around behavior during iterations.

What is the best way to structure tests before writing implementation code?▼

The best way to structure tests before writing implementation code is to follow the red-green-refactoring framework. Start with a failing test for the specific feature, write just enough code to pass it, and then refactor to clean up the codebase.