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Applying TDD to observable behavior changes v1.0.0

Use this resource to implement an observable behavior change with TDD

New

  • 450 downloads
  • 236 likes
  • 200 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install tdd-behavior-change-workflow

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 determines the repository's production and test boundaries, splits the work by observable behavior, then writes the tests first. It does not apply red-first mechanically to configuration or wiring. You get tests that describe the expected behavior, then the code that satisfies them.

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Updated November 2, 2026

Card for the “Applying TDD to observable behavior changes” skill

Details

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

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What you get

  • SKILL.md: boundary definition, red-green cycle and exceptions
  • references/test-boundaries.md: test boundaries per ecosystem

Good fit for

  • You are adding an observable business rule to a testable module
  • You are fixing a behavior bug and want a test that reproduces it

Not for

    Tags

    • tdd
    • tests
    • behavior
    • boundaries

    About

    You say

    “Implement the volume discount calculation with TDD, tests first.”

    Card for the “Applying TDD to observable behavior changes” skill

    Skill published by narumiruna 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 implement an observable behavior change with TDD
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • references/test-boundaries.md8.2 KB
    • SKILL.md3.5 KB

    Origin and licence

    Listed unmodified

    Author
    narumiruna
    Source
    github.com/narumiruna/skills/tree/079415193cdacb7947dc0dde9526bda7dd659f43/skills/optional/apply-tdd
    Licence
    MIT

    Notice

    « apply-tdd » (narumiruna, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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