Mobile Design skill: what it does and how to install it

What it does. Assesses mobile features with a feasibility score, asks for platform, framework, navigation, offline, device and audience context, then applies touch-first and platform-specific guidance. It covers performance patterns, secure storage, offline handling, accessibility, testing and release checks for React Native, Flutter, SwiftUI and Compose.

When to use it. Use before designing or implementing mobile screens and features, especially when interactions, lists, media, offline behaviour or accessibility create risk. It requires clarification and reference reading before work, and does not replace device testing or environment-specific validation.