What problem does it solve? Teams often jump into implementation without locking down architecture, leading to over-engineering, unclear interfaces, and missing test coverage. This Skill enforces an engineering-manager review pass that maps the system before code is written. ## Core Features & Use Cases - Architecture Mapping: Produces an architecture map, data flow diagram, and trust boundary analysis for the planned work. - Failure Mode Analysis: Identifies failure modes and calls out both over-engineering and under-engineering. - Test Planning: Delivers a concrete test plan and a minimal-diff recommendation before implementation starts. - Use Case: After product direction is set for a new feature, run this review to lock the minimal viable architecture, then hand off to implementation and later to a preflight review. ## Quick Start Ask the assistant to run an engineering review of the proposed feature, covering architecture, data flow, failure modes, and a test plan.