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From bug to invariant in the spec v1.0.0

Use this resource to turn a bug into an invariant and a spec entry

New

  • 456 downloads
  • 211 likes
  • 148 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install bug-to-invariant-spec-update

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 traces the failure back to the faulty line, checks whether a new invariant would prevent a recurrence, proposes the rule, generates a test and logs the entry in §B. You fix the code and the spec together, so the bug does not come back.

Mostly picked by

Updated November 2, 2026

Card for the “From bug to invariant in the spec” skill

Details

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

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What you get

  • SKILL.md: triggers and six steps from trace to log
  • SKILL.md: criteria for a good invariant and cases where none is added

Good fit for

  • A test fails during a build and the cause is hard to locate
  • A production incident should lead to a rule in the spec

Not for

    Tags

    • bug
    • invariant
    • spec
    • regression
    • post-mortem

    About

    You say

    “This billing test failed: find the cause and propose the invariant that would have caught it.”

    Card for the “From bug to invariant in the spec” skill

    Skill published by juliusbrussee 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 turn a bug into an invariant and a spec entry
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • SKILL.md2.7 KB

    Origin and licence

    Listed unmodified

    Author
    juliusbrussee
    Source
    github.com/juliusbrussee/cavekit/tree/7421e87d5b517c415c519ddf58a3dd10ba842530/skills/backprop
    Licence
    MIT

    Notice

    « backprop » (juliusbrussee, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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