What problem does it solve? Engineering plans often ship with scope creep, missing test coverage, and unexamined architecture decisions. This Skill enforces a structured technical review gate so a plan or change is validated for engineering soundness before implementation or release. ## Core Features & Use Cases - Blocking scope challenge: Maps reusable existing code, flags plans touching 8+ files, and enforces 2-5 minute granularity per implementation leaf with decompose-or-accept decisions. - Four-section review: Covers architecture, code quality (DRY, error handling, tech debt), mandatory test coverage diagrams with regression rules, and performance (N+1 queries, caching, slow paths). - Persisted review report: Writes a REVIEW REPORT section with verdict into the plan doc and logs results via bin/li-review-log so the ship phase can gate on it. - Use Case: Before shipping a feature branch, run the review against your design doc to get a CLEAR/NOT CLEARED verdict, unresolved decision list, and a regression-test task list. ## Quick Start Ask the agent to run /plan-eng-review on your current plan document to produce a verdict and review report before implementation.