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test-driven-development

Guide developers through the Red-Green-Refactor cycle for test-driven development.

Updated Apr 11, 2026
Search Tags:#testing#tdd#debugging#red-green-refactor#unit-testing#quality-assurance#software-engineering
One-click install
npx skills add https://github.com/ilderaj/superpowering-with-files --skill test-driven-development-ilderaj
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/ilderaj/superpowering-with-files/tree/main/harness/upstream/superpowers/skills/test-driven-development
Command: npx skills add https://github.com/ilderaj/superpowering-with-files --skill test-driven-development-ilderaj

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Writing robust software relies on validating requirements before coding; this skill guides teams to adopt a test-driven development approach that helps prevent regressions.

Core Features & Use Cases

  • Red-Green-Refactor cycle: write a failing test, implement the minimal production code to pass, then refactor.
  • Clear guidance for feature work, bug fixes, and refactors; warnings about throwaway prototypes, generated code, and risky configurations.
  • Use cases include new features, bug fixes, and refactors across languages and ecosystems with strong test coverage.

Quick Start

Start by writing a failing test, then implement the minimal production code to pass, and finally refactor for clarity.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema
How do I use test-driven development for new features and bug fixes?▼

Test-driven development guides you to write a failing test first, implement minimal production code to pass it, then refactor. This Red-Green-Refactor cycle applies directly to feature work, bug fixes, and behavior changes across languages.

What is the Red-Green-Refactor cycle in unit testing?▼

The Red-Green-Refactor cycle is a unit testing workflow where you write a failing test, implement minimal code to make it pass, then refactor safely. It enforces incremental improvements and validates requirements before production code is written.

Does test-driven development work across different languages and frameworks?▼

Test-driven development works across languages and frameworks with strong test coverage. It provides clear guidance for feature work and refactoring, verifying failures and promoting safe incremental improvements regardless of your ecosystem.

When should I avoid using test-driven development?▼

You should avoid test-driven development for throwaway prototypes, generated code, and risky configurations. The cycle provides guardrails for feature work and refactoring, but warnings indicate it is not suited for exploratory or temporary code.

How do I start unit testing with a fail-fast approach?▼

To start unit testing with a fail-fast approach, write a failing test that validates a requirement, implement the minimal production code to pass that test, and finally refactor the code for clarity and safe incremental improvements.

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