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tdd

Enforce the RED-GREEN-REFACTOR cycle for test-first code changes.

4|Updated Jan 1, 2026
Search Tags:#tdd#refactoring#red-green-refactor#unit-testing#quality-assurance#test-driven-development#software-testing
One-click install
npx skills add https://github.com/vertexcover-io/tarash --skill tdd-vertexcover-io
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: tdd
Source: https://github.com/vertexcover-io/tarash/tree/main/.claude/skills/tdd
Command: npx skills add https://github.com/vertexcover-io/tarash --skill tdd-vertexcover-io

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

TDD provides a disciplined workflow to ensure code correctness and maintainability by guiding development through tests before production code.

Core Features & Use Cases

  • Test-Driven Workflow: Enforces RED-GREEN-REFACTOR cycle to reduce regressions.
  • Safety Guardrails: Ensures failing tests drive changes and prevent feature creep.
  • Use Case: For refactoring tasks, ensure no functionality is broken by writing tests first.

Quick Start

Enable TDD by first writing a failing test that specifies the desired behavior, then implement the minimal code to pass it.

Frequently Asked Questions about tdd

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

FAQPage Schema
What is the test-driven development workflow for writing reliable code?▼

Test-driven development (TDD) is a workflow enforcing the RED-GREEN-REFACTOR cycle to ensure code correctness. It requires writing a failing test first to specify behavior, implementing minimal code to pass it, and then refactoring safely.

How do I use test-driven development to safely refactor existing code?▼

To use test-driven development for refactoring, you must first write failing tests that specify the existing behavior. Once tests pass, the TDD guardrails allow you to refactor incrementally, ensuring no functionality is broken or feature creep is introduced.

When should I use a test-first workflow during software development?▼

You should use a test-first workflow when guiding feature additions, bug fixes, or refactoring tasks in TDD-configured projects. It provides safety guardrails that prevent regressions and ensure code maintainability throughout incremental changes.

Does test-driven development require failing tests before writing production code?▼

Yes, test-driven development strictly requires failing tests before any production code is written. This mechanism drives code changes, enforces the RED-GREEN-REFACTOR cycle, and provides necessary guardrails to track development progress accurately.

What are the limitations of enforcing the RED-GREEN-REFACTOR cycle?▼

The RED-GREEN-REFACTOR cycle is limited to TDD-configured projects and requires strict discipline to write failing tests before implementation. It may slow initial feature development but prevents regressions and feature creep during incremental changes.

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