What problem does it solve? Reviewing changes in a cross-platform React and React Native monorepo is error-prone because the same finding category means different things on web (Tailwind) versus native (useStyleSheet), and manual reviewers often miss version-plan requirements or apply the wrong platform's rules. ## Core Features & Use Cases - Platform routing: Maps each changed file to React web or React Native guidelines so Tailwind rules never leak onto RN files and vice versa. - Severity-scored findings: Produces a flat findings table with 1-10 severity ratings, categories, and exact file:line locations, sorted by severity. - Version plan verification: Checks Nx version plans for missing plans, wrong bump types, and multi-package grouping. - Use Case: Paste a GitHub PR URL or point at your current branch, and receive a structured review covering correctness, type safety, performance, API parity, and release readiness while skipping issues already caught by ESLint. ## Quick Start Ask the assistant to review the current branch or a specific GitHub PR against Lumen's design-system conventions.