test-driven-development

Enforce the RED-GREEN-REFACTOR cycle by writing failing tests before implementation code.

Updated Mar 16, 2026

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

Ready to run

npx skills add https://github.com/Likas07/t3code-skills --skill test-driven-development-likas07

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/Likas07/t3code-skills/tree/main/skills/test-driven-development
Command: npx skills add https://github.com/Likas07/t3code-skills --skill test-driven-development-likas07

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill enforces a rigorous Test-Driven Development (TDD) process to ensure code quality, prevent regressions, and build robust software by writing tests before implementation.

Core Features & Use Cases

Strict RED-GREEN-REFACTOR Cycle: Guides users through writing a failing test, minimal code to pass, and refactoring.
Rationalization Prevention: Provides clear arguments against common excuses for skipping TDD.
Use Case: When starting any new feature or bug fix, use this Skill to ensure you write a failing test first, guaranteeing the code addresses a specific, verifiable requirement and preventing future bugs.

Quick Start

Follow the RED-GREEN-REFACTOR cycle for all new code development.

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 tests before implementation code using TDD?▼

The TDD process is enforced through the strict RED-GREEN-REFACTOR cycle: write a failing test, write minimal code to pass it, then refactor. This discipline prevents rationalizations for skipping tests and ensures code addresses verifiable requirements.

Why does test-driven development help prevent regressions during refactoring?▼

Test-driven development prevents regressions by mandating tests before implementation, creating a safety net. When refactoring, these tests verify existing behavior remains intact, ensuring software quality and preventing future bugs from rationalizations for skipping TDD.

What is the RED-GREEN-REFACTOR cycle in agile software development?▼

The RED-GREEN-REFACTOR cycle is the core TDD mechanism: write a failing test (RED), implement minimal code to pass it (GREEN), and refactor the code (REFACTOR). This agile process ensures code quality and prevents skipping testing steps.

Can I use TDD for both new features and bug fixes?▼

Yes, strict test-driven development principles apply to all new features, bug fixes, and refactoring tasks. Mandating a failing test first guarantees the code addresses a specific, verifiable requirement and prevents future bugs across all development scenarios.

What are common rationalizations for skipping TDD and how do I prevent them?▼

Common rationalizations for skipping TDD include time constraints or perceived simplicity. This discipline provides clear arguments against these excuses, enforcing the RED-GREEN-REFACTOR cycle to ensure code quality and prevent regressions in software development.