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Finds what a change could break beyond the diff and proves the one fact it is safe because of by running real code instead of writing it up. 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
blast-radiusplugin: finds what a change could break somewhere else before it ships, beyond the diff, and requires the one fact the change is safe because of to be proven by running real code — not asserted in a writeup. Includes a five-level certainty ladder and a structured hand-back format.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 companion-skill and tooling references removed and Droid conventions applied. Made model-invocable so Droid applies it proactively.Checklist
plugins/blast-radius/with.factory-plugin/plugin.jsonskills/(per the check-skills CI).factory-plugin/marketplace.jsonentry added