What problem does it solve? Engineering plans often contain hidden architecture flaws, missing test coverage, and performance risks that only surface during implementation. This Skill locks in an execution plan by walking through issues interactively with opinionated recommendations before any code is written. ## Core Features & Use Cases - Four-Section Review: Evaluates architecture, code quality, test coverage, and performance, raising each finding as an individual decision with options and recommendations. - Test Coverage Audit: Traces every codepath and user flow in the plan, produces an ASCII coverage diagram, and adds missing unit, E2E, and eval tests to the plan. - Outside Voice Challenge: Runs an independent second opinion from another AI model (Codex CLI or a Claude subagent) and presents cross-model disagreements for user decision. - Use Case: Before starting a multi-day feature build, run this Skill on your design doc to catch a missing database index, an untested error path, and an over-engineered component — each resolved interactively before implementation begins. ## Quick Start Ask the AI to review the architecture and lock in the implementation plan for your current design doc.
