Pulled from OpenAI's internal skills repository, this gives you their production frontend playbook for building landing pages and UI with restrained composition. It's designed to work with Claude's design system mode, so you get opinionated guidance on visual hierarchy and layout decisions rather than just component libraries. Useful when you want to ship clean, focused interfaces without overthinking every spacing decision. The triggers are broad enough that it'll activate when you're working on any frontend task, which means you're getting OpenAI's house style whether you asked for it or not. Worth trying if you like their aesthetic, but know it's going to push you toward minimalism.
npx skills add https://github.com/nexu-io/open-design --skill frontend-skill