platform-design

Platform Design is a thin catalogue entry advertising a cross-platform design-rules reference curated from @ehmo. It describes a collection of 300-plus design rules drawn from Apple's Human Interface Guidelines, Material Design 3, and WCAG 2.2, intended to help teams ship a single coherent design across iOS, Android, and the web. It is triggered by phrases such as "platform design", "cross platform design", "material design", "hig rules", or "wcag rules".

The entry is explicit that it is a discovery pointer rather than a full implementation. Its SKILL.md states that the catalogue entry exists so an Open Design agent surfaces the skill during planning, and that running the full upstream workflow with its original assets, scripts, and references requires installing the upstream bundle from the linked GitHub repository into the active agent's skills directory. The only shell guidance is an 'open' command to inspect the upstream README.

Target users are designers and front-end engineers building products that must feel native and accessible across multiple platforms, and who want a consolidated ruleset spanning HIG, Material, and accessibility standards. The substantive rules live in the upstream repository; this entry's role is to make the skill discoverable and route users to that source.