This skill is a legitimate software workflow tool, but it can auto-activate on broad phrases and create persistent project files before clear user consent.
Review before installing. Use it only in repositories where you are comfortable with automatic creation of .agent/harness and docs/harness files, possible source-code changes, and verification commands that may install dependencies. Prefer invoking it explicitly with /reqplan, keep the workspace under version control, and avoid using it on projects containing secrets or sensitive customer data unless you first confirm what it will write.