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tdd

Enforce a RED-GREEN-REFACTOR test-first workflow for production code.

3|2|Updated Feb 10, 2026
Search Tags:#testing#tdd#agile#red-green-refactor#code-quality#test-driven#unit-tests
One-click install
npx skills add https://github.com/sami-abdul/claude-predev-setup --skill tdd-sami-abdul
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: tdd
Source: https://github.com/sami-abdul/claude-predev-setup/tree/main/scaffold/.claude/skills/tdd
Command: npx skills add https://github.com/sami-abdul/claude-predev-setup --skill tdd-sami-abdul

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

TDD helps teams avoid untested production code by ensuring every feature starts with a failing test, guiding minimal, reliable implementation.

Core Features & Use Cases

  • Enforces a RED-GREEN-REFACTOR cycle to drive development with tests.
  • Improves code reliability and regression safety across features and bug fixes.
  • Use Case: When adding a new feature, write a failing test first, then implement production code until the test passes.

Quick Start

Write a failing test that describes the desired behavior, then implement only enough production code to make it pass.

Frequently Asked Questions about tdd

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

FAQPage Schema
What is test-driven development and how does the red-green-refactor cycle work?▼

Test-driven development (TDD) is a test-first workflow where you write a failing test, implement minimal production code to pass it, then refactor. This RED-GREEN-REFACTOR cycle prevents untested code and improves reliability across features and bug fixes.

How do I start writing unit tests before implementing new features?▼

To start writing unit tests with a test-first approach, write a failing test that describes the desired behavior of your feature, then implement only enough production code to make that test pass, ensuring regression safety and minimal implementation.

Can I apply test-first development across different programming languages and codebases?▼

Yes, test-first development is applicable during feature development and bug fixes across programming languages and codebases. It enforces a universal workflow requiring adherence to the RED-GREEN-REFACTOR cycle to ensure code quality.

How do I fix bugs using a test-driven workflow?▼

To fix bugs using a test-driven workflow, write a failing unit test that reproduces the specific bug, then implement minimal production code until the test suite passes, ensuring regression safety and preventing future occurrences of the defect.

Why does test-driven development require passing test suites before refactoring?▼

Test-driven development requires passing test suites before refactoring to ensure existing behavior remains intact. The RED-GREEN-REFACTOR cycle mandates a passing GREEN state before improving code structure, guaranteeing code quality and regression safety.

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