What problem does it solve? Engineering plans often ship with silent failure modes, unhandled edge cases, missing tests, and unexamined scope assumptions. This Skill performs a rigorous, founder-grade review of any implementation plan before code is written, catching landmines early. ## Core Features & Use Cases - Three Review Modes: Choose SCOPE EXPANSION (dream big, find the 10-star product), HOLD SCOPE (maximum rigor on the agreed plan), or SCOPE REDUCTION (strip to the minimum viable version). - Ten Structured Review Sections: Covers architecture, error/rescue mapping, security threat modeling, data flow edge cases, code quality, tests, performance, observability, deployment, and long-term trajectory. - Mandatory Registries and Diagrams: Produces an error & rescue registry, failure modes registry, ASCII architecture/data-flow/state-machine diagrams, TODOS.md proposals, and a completion summary. - Use Case: Before implementing a new feature touching multiple services, run this review to map every exception class, flag unrescued errors as critical gaps, and decide interactively whether to expand, hold, or cut scope. ## Quick Start Ask the assistant to run a CEO-mode plan review on your current implementation plan and select a scope mode when prompted.