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test-driven-development

Enforce the Red-Green-Refactor cycle by writing failing tests before production code.

1|1|Updated Nov 22, 2025
Search Tags:#testing#tdd#quality assurance#refactoring#software development#agile
One-click install
npx skills add https://github.com/ntaksh42/agents --skill test-driven-development-ntaksh42
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/ntaksh42/agents/tree/main/.claude/skills/test-driven-development
Command: npx skills add https://github.com/ntaksh42/agents --skill test-driven-development-ntaksh42

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill enforces a rigorous development process by ensuring that tests are written before any implementation code, guaranteeing that tests actually verify behavior and catch regressions.

Core Features & Use Cases

  • Mandatory Test-First Approach: Enforces the "Red-Green-Refactor" cycle.
  • Behavior Verification: Ensures tests are written to confirm desired outcomes, not just to check existing code.
  • Use Case: When developing a new feature, you will first write a test that is expected to fail, then write the minimal code to make it pass, and finally refactor.

Quick Start

Use the test-driven-development skill to enforce writing tests before implementation code.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema
How does test-driven development improve software quality and prevent regressions?▼

Test-driven development improves software quality by requiring a failing test before writing production code, ensuring tests accurately verify intended behavior and prevent regressions throughout the development cycle.

How do I apply the Red-Green-Refactor cycle when developing a new feature?▼

To apply the Red-Green-Refactor cycle, first write a test that fails for the new feature, then write minimal production code to make it pass, and finally refactor the code while keeping the test green.

When should I use a test-first approach for bug fixes and refactoring?▼

A test-first approach should be used for all bug fixes and refactoring efforts to guarantee that tests verify desired outcomes and catch regressions before implementation changes are introduced.

Can I use this test-driven development methodology within an agile workflow?▼

Yes, this test-driven development methodology fits within agile workflows by enforcing behavior verification and the Red-Green-Refactor cycle, facilitating robust software development for new features and bug fixes.

What is the difference between behavior verification and testing existing code?▼

Behavior verification confirms desired outcomes by writing tests before implementation, whereas testing existing code merely checks current behavior, which may include hidden bugs and unverified regressions.

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