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test-driven-development

Guide test-first development with a Red-Green-Refactor workflow.

6|1|Updated Mar 5, 2026
Search Tags:#workflow#tdd#red-green-refactor#quality-assurance#software-engineering#unit-tests#test-driven-development
One-click install
npx skills add https://github.com/pwv-vc/agentcribs-community --skill test-driven-development-pwv-vc
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/pwv-vc/agentcribs-community/tree/main/resources/tearsheets/arsenal/dot-claude/skills/test-driven-development
Command: npx skills add https://github.com/pwv-vc/agentcribs-community --skill test-driven-development-pwv-vc

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Writing code without failing tests first often leads to undetected regressions and brittle behavior. This skill guides you to adopt a test-first approach, ensuring every feature or bugfix starts with a failing test that encodes the expected behavior.

Core Features & Use Cases

  • Enforces the Red-Green-Refactor cycle to validate new functionality.
  • Provides a repeatable workflow for feature development, bug fixes, and refactoring.
  • Improves code quality by requiring tests to fail first and pass only after minimal, correct implementations.

Quick Start

Write a failing unit test for the new behavior, then implement the minimal code to pass.

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 prevent regressions when writing new features?▼

The Red-Green-Refactor workflow structures test-first development into three phases: write a failing test, implement minimal code to pass it, then refactor safely. This cycle ensures software engineering tasks maintain quality assurance throughout.

Can I apply test-driven development to bug fixes and refactoring?▼

Yes, test-driven development applies to bug fixes and refactoring by first writing a failing test that reproduces the bug or validates current behavior. This structured workflow ensures your refactor or fix passes all unit tests without regressions.

What is the best way to start writing a failing test for a new behavior?▼

The best way to start is to write a failing unit test for the desired behavior, run it to confirm failure, and then implement the minimal production code required to pass. This enforces a structured, test-first development workflow.

Does test-driven development work for integration and end-to-end tests?▼

Test-driven development works across unit, integration, and end-to-end layers by guiding users to write a failing test before coding. This structured approach validates feature work at all testing levels to ensure correct implementation.

When should I not use a test-first approach for software engineering?▼

You should avoid a test-first approach when exploring experimental prototypes where behavior is undefined, as writing failing tests requires clear expected outcomes to guide minimal, correct implementations effectively.

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