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Diagnose a failure from its symptoms v1.0.0

Use this resource to diagnose an error or regression and propose a verified minimal repair

New

  • 308 downloads
  • 147 likes
  • 208 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install symptom-to-root-cause-debug

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 reproduces the symptom, classifies the broken invariant, traces the smallest root cause and writes a test that fails before the fix. If you ask, it applies a minimal fix in your working tree, without committing.

Mostly picked by

Updated November 2, 2026

Card for the “Diagnose a failure from its symptoms” skill

Details

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

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What you get

  • SKILL.md: arguments, workflow and output format
  • references/diagnosis-map.md and regression-oracles.md: diagnosis map and regression test types

Good fit for

  • A test starts failing after an update with no obvious reason
  • A feature that used to work has broken and you do not know why

Not for

    Tags

    • debugging
    • regression
    • diagnosis
    • fix
    • test

    About

    You say

    “Why has this test failed since the last commit? Diagnose it and fix it if it is simple.”

    Card for the “Diagnose a failure from its symptoms” skill

    Skill published by open-mercato 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 diagnose an error or regression and propose a verified minimal repair
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • references/agentic-setup.md4.1 KB
    • references/diagnosis-map.md3.5 KB
    • references/regression-oracles.md1.5 KB
    • references/report-templates.md2.2 KB
    • references/rules.md6.1 KB
    • SKILL.md6.8 KB

    Origin and licence

    Listed unmodified

    Author
    open-mercato
    Source
    github.com/open-mercato/skills/tree/002bf5cbf9e9ffe4b56120b4f79080cf61df79d4/skills/om-troubleshooter
    Licence
    MIT

    Notice

    « om-troubleshooter » (open-mercato, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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