Unified mobile platform assessment — merges former mobile-architecture and mobile-assessment into one skill. Covers cross-platform vs native strategy, store compliance, app vitals, architecture patterns, offline-first design, performance optimization, dependency health, and remediation roadmaps. Use when the user asks to "assess mobile architecture", "evaluate mobile platform", "audit app health", "choose between native and cross-platform", "check store compliance", "optimize mobile performance", "review app dependencies", or mentions Flutter, React Native, KMP, MVVM, crash rate, ANR, app size, cold start time, or mobile tech debt.