What problem does it solve? Engineering plans often hide architecture flaws, missing edge cases, and scope creep that only surface after code is written. This Skill runs an engineering-manager-style review of your plan or design doc before implementation, catching issues when they are cheapest to fix. ## Core Features & Use Cases - Scope Challenge (Step 0): Identifies existing code that already solves sub-problems, flags plans touching 8+ files or 2+ new services, and challenges shortcuts against a completeness standard. - Interactive Issue Walkthrough: Presents each finding with concrete tradeoffs, an opinionated recommendation, and completeness scores, then asks for your decision before proceeding. - Architecture & Test Review: Evaluates data flow, ASCII diagrams, edge cases, test coverage, and performance using engineering-leadership heuristics like blast radius, boring-by-default technology choices, and reversibility. - Use Case: You have a design doc for a new billing feature and are about to start coding. Run this review to catch an N+1 query pattern, a missing failure-mode test, and an unnecessary new service before writing a single line. ## Quick Start Ask the AI to run an engineering review of the current plan or design doc on this branch before starting implementation.