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test-driven-development

Guide developers to write failing tests before implementation code.

Updated Apr 1, 2026
Search Tags:#testing#tdd#software development#bug fixing#test-first
One-click install
npx skills add https://github.com/evanfang0054/agent-harness --skill test-driven-development-evanfang0054
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/evanfang0054/agent-harness/tree/main/skills/test-driven-development
Command: npx skills add https://github.com/evanfang0054/agent-harness --skill test-driven-development-evanfang0054

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill helps establish and maintain a test-first approach to development, improving code quality and reliability.

Core Features & Use Cases

  • Test-First Discipline: Guides developers to write tests before implementation code.
  • Red-Green-Refactor Cycle: Encourages writing a failing test, then writing code to pass the test, and finally refactoring the code.
  • Good Tests: Promotes writing clear, minimal, and meaningful tests.

Quick Start

Begin a new feature or bugfix by writing a failing test for the desired functionality.

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 is a test-first approach where you write failing tests before implementation code to ensure correct behavior. It improves code quality and reliability by enforcing clear requirements and guiding refactoring for maintainability.

How do I start a new feature using the red-green-refactor cycle?▼

To start a feature with the red-green-refactor cycle, write a failing test for the desired functionality, implement the minimal code required to pass that test, and finally refactor the code for better maintainability without changing behavior.

Can I use test-first development for both feature development and bug fixing?▼

Yes, test-first development applies to both feature development and bug fixing. You begin by writing a failing test that defines the desired functionality or reproduces the bug, then implement code to make the test pass.

What's the best way to write meaningful tests during software development?▼

The best way to write meaningful tests is to keep them clear, minimal, and focused on desired functionality. Write tests that specifically validate intended behavior to ensure code coverage and reliability throughout all development phases.

Does test-driven development require any specific testing frameworks or dependencies?▼

No specific testing frameworks or dependencies are required to apply test-driven development. The practice focuses on the test-first discipline and the red-green-refactor cycle, making it applicable across any software development environment.

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