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Test-driven development: red, green, refactor v1.0.0

Use this resource to write a failing test before any production code, then make it pass

New

  • 494 downloads
  • 109 likes
  • 145 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install test-first-development-cycle

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent follows the red, green, refactor cycle: failing test, minimal code, cleanup. You get tests that prove the expected behavior and code limited to what is needed.

Mostly picked by

Updated November 2, 2026

Card for the “Test-driven development: red, green, refactor” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • SKILL.md: the iron law and the red, green, refactor cycle
  • SKILL.md: criteria for good tests and allowed exceptions

Good fit for

  • You are adding a feature or fixing a bug
  • You are refactoring a module and want to keep its behavior

Not for

    Tags

    • tdd
    • tests
    • refactoring
    • development

    About

    You say

    “Add a VAT calculation function with TDD: write the failing test first.”

    Card for the “Test-driven development: red, green, refactor” skill

    Skill published by obra under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to write a failing test before any production code, then make it pass
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • SKILL.md9.8 KB

    Origin and licence

    Listed unmodified

    Author
    obra
    Source
    github.com/obra/superpowers-skills/tree/cdcd624ad3fd8026deb692e565351854569798dd/skills/testing/test-driven-development
    Licence
    MIT

    Notice

    « Test-Driven Development (TDD) » (obra, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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