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Red-green-refactor TDD in TypeScript v1.0.0

Use this resource to build a feature or fix a bug test-first

New

  • 460 downloads
  • 108 likes
  • 183 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install red-green-refactor-typescript

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 writes one test, checks that it fails for the right reason, adds the minimal code to make it pass, then refactors. The example uses TypeScript with Vitest. You get code checked by tests at each step.

Mostly picked by

Updated November 2, 2026

Card for the “Red-green-refactor TDD in TypeScript” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
Apache-2.0

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What you get

  • SKILL.md: three-phase cycle and operating rules
  • SKILL.md: worked example with TypeScript and Vitest

Good fit for

  • You add a feature to a TypeScript project
  • You fix a bug with a test that reproduces it first

Not for

    Tags

    • TDD
    • TypeScript
    • tests
    • Vitest

    About

    You say

    “Add a VAT calculation function test-first, with Vitest.”

    Card for the “Red-green-refactor TDD in TypeScript” skill

    Skill published by google-labs-code under the Apache-2.0 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 build a feature or fix a bug test-first
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE11.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • SKILL.md3 KB

    Origin and licence

    Listed unmodified

    Author
    google-labs-code
    Source
    github.com/google-labs-code/design.md/tree/6e5da5382f41edbba9d73b2c62f33f32e9971f15/.agents/skills/tdd
    Licence
    Apache-2.0

    Notice

    « tdd-red-green-refactor » (google-labs-code, Apache-2.0) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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