Agent Skills Hub

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What are agent skills?

Agent skills package instructions, scripts, and reference material into a single folder (SKILL.md) so an AI agent can perform a specific task better. Claude, ChatGPT/Codex, Cursor, Gemini CLI, and GitHub Copilot all support the same format.

About this site

We collect skills from across the web and show which agents they work with and how to install them. Each skill belongs to its original author, and we always link to the source.

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Category: Development

Test-Driven Development (Superpowers)

Superpowers TDD skill: write tests before implementation code.

Works with

What it does

  • Test-Driven Development (TDD)
  • Write the test first. Watch it fail. Write minimal code to pass.
  • Core principle:* If you didn't watch the test fail, you don't know if it tests the right thing.
  • Violating the letter of the rules is violating the spirit of the rules.*

When to use it

Superpowers TDD skill: write tests before implementation code.

How to install

  1. Run the command below in your terminal. Pick the agents you use (Claude Code, Codex, Cursor, Gemini CLI, Copilot, and more) and it installs into the right folder.
npx skills add https://github.com/obra/superpowers --skill test-driven-development
  1. To install manually, download the test-driven-development skill folder from the GitHub repository and copy it into your agent's skills folder, such as ~/.claude/skills/ or .cursor/skills/.
  2. Ask your agent for a related task and the skill is used automatically.
View source ↗

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