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Debugging guardrail: trace each symptom back to the first place the system went wrong and fix it there, instead of patching the symptom. Adapted from the pstack skills (MIT, (c) Lauren Tan, https://github.com/cursor/plugins), Cursor-specific tooling removed.
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Part of a 10-PR series contributing the agent-guardrail skill stack (prove-it-works, blast-radius, fix-root-causes, subtract-before-you-add, correct, interrogate, show-me-your-work, create-verification-skill, maintain-verification-skill, property-based-testing). Each PR is independent, adds exactly one single-skill plugin, and can be reviewed and merged in any order; adjacent additions to
marketplace.json/README.mdmay show trivial conflicts with sibling PRs.What
Adds the
fix-root-causesplugin: a debugging guardrail that traces each symptom back to the first place the system went wrong and fixes it there. A guard counts as a fix only when the state it handles is legitimate; otherwise the guard hides the bug.Why
The marketplace ships code-review, security, and runtime-verification guardrails (
droid-control's/verify), but nothing covering behavioral verification discipline for the agent itself. This stack was built and battle-tested in a hackathon repo's quality gates; we are contributing it back.Provenance and license
Adapted from the pstack skills by Lauren Tan (cursor/plugins, MIT License, commit
c742dd6), with Cursor-specific machinery removed and Droid conventions applied. Made model-invocable so Droid applies it proactively.Checklist
plugins/fix-root-causes/with.factory-plugin/plugin.jsonskills/(per the check-skills CI).factory-plugin/marketplace.jsonentry added