What problem does it solve? Engineering plans often hide architecture flaws, missing test coverage, and scope creep that only surface after coding starts. This Skill performs an engineering-manager-style review of a plan or design doc before implementation, walking through issues interactively with opinionated recommendations. ## Core Features & Use Cases - Scope Challenge (Step 0): Checks whether existing code already solves sub-problems, flags plans touching 8+ files or 2+ new services, and verifies the plan is not a shortcut when completeness is cheap. - Structured Review Sections: Walks through Architecture, Code Quality, Tests, and Performance one section at a time with at most 8 top issues each, using ASCII diagrams for data flow and test coverage. - Opinionated Recommendations: Every issue comes with concrete tradeoffs, a recommendation, completeness scoring, and an AskUserQuestion prompt before any direction is assumed. - Use Case: You have a design doc for a new billing feature and are about to start coding. Run the review to catch an N+1 query risk, a missing failure-path test, and an unnecessary new service before writing a line of code. ## Quick Start Ask the AI to run an engineering review of the current plan or design doc to lock in the architecture before implementation.