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Gate new tests before writing them v1.0.0

Use this resource to decide whether a test should be added or changed, and keep it efficient

New

  • 398 downloads
  • 139 likes
  • 220 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install test-value-gate-check

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 asks two questions: does the test catch a realistic regression that no existing test catches, and where should it live? It recommends extending the nearest test, parameterising near-duplicates and keeping tests deterministic and isolated. You get a justified test or a decision not to write one.

Mostly picked by

Updated November 2, 2026

Card for the “Gate new tests before writing them” skill

Details

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

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What you get

  • SKILL.md: value questions, five reasons not to write a test and test levels
  • SKILL.md: Python and Jest practices and pre-PR checklist
  • references/mistakes-we-make.md: catalogue of bug shapes the project has shipped

Good fit for

  • You add an assertion to an existing test block or a new pytest test
  • A PR contains several near-identical tests

Not for

    Tags

    • tests
    • pytest
    • jest
    • quality

    About

    You say

    “Do we need a new test for this case, or should I extend the existing test in the same block?”

    Card for the “Gate new tests before writing them” skill

    Skill published by posthog 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 decide whether a test should be added or changed, and keep it efficient
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.5 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • references/database-free-test-classes.md3.9 KB
    • references/mistakes-we-make.md10.3 KB
    • SKILL.md23.5 KB

    Origin and licence

    Listed unmodified

    Author
    posthog
    Source
    github.com/posthog/posthog/tree/fcb362bb439b15171da4dfba401bff03ea98bd2b/.agents/skills/writing-tests
    Licence
    MIT

    Notice

    « writing-tests » (posthog, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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