platform-design Curated from @ehmo. What it does 300+ design rules from Apple HIG, Material Design 3, and WCAG 2.2 for cross-platform apps. Useful when shipping a single design across iOS, Android, and the web. Source - Upstream: https://github.com/ehmo/platform-design-skills - Category: How to use This catalogue entry advertises the skill in Open Design so the agent discovers it during planning. To run the full upstream workflow with its original assets, scripts, and references, install the upstream bundle into your active agent's skills directory: Then ask the agent to invoke this skill by…