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test-driven-development

Enforce test-first development with failing tests before production code.

2|Updated Mar 26, 2026
Search Tags:#tdd#refactoring#code-quality#test-driven-development#software-testing#testing-first
One-click install
npx skills add https://github.com/CUexter/hermes-agent --skill test-driven-development-cuexter
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/CUexter/hermes-agent/tree/main/skills/software-development/test-driven-development
Command: npx skills add https://github.com/CUexter/hermes-agent --skill test-driven-development-cuexter

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Writing production-ready software without tests often leads to regressions and hard-to-track bugs; TDD provides a disciplined approach to prevent this.

Core Features & Use Cases

  • Enforces a test-first workflow to guide implementation and ensure test coverage.
  • Supports Red-Green-Refactor cycles with actionable guidance and examples.
  • Use Case: When implementing a new feature or fixing a bug, write a failing test first, then code to pass it, and finally refactor for clarity.

Quick Start

Run a failing test first, implement the minimal code to pass, then refactor for readability.

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 with a test-first workflow?▼

A test-first workflow requires writing a failing test for the new feature or bug fix, implementing minimal code to pass it, and then refactoring for clarity.

What is the Red-Green-Refactor cycle in software testing?▼

The Red-Green-Refactor cycle means writing a failing test first (Red), writing minimal production code to pass it (Green), and refactoring to improve code quality while maintaining passing tests.

Does test-driven development work for bug fixes and refactoring?▼

Test-driven development applies directly to bug fixes and refactors by precluding production code changes without a corresponding failing test to validate the correction and prevent regressions.

When do I need to apply test-driven development?▼

You need test-driven development when writing production-ready software that relies on automated tests to prevent regressions and ensure disciplined code quality across feature development.

Why does writing production code without tests lead to regressions?▼

Writing production code without tests leads to hard-to-track bugs because no automated fail-fast mechanism exists to validate behavior, making strict test-driven development necessary for regression prevention.

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