This one coaches Claude to write interface copy that actually helps users instead of sounding like a robot wrote it. It covers the essentials: microcopy for buttons and forms, error messages that explain what happened and what to do next, empty states that guide action, and CTAs that start with verbs. The principles are solid, clear over clever, concise over comprehensive, and it pushes you to think about content before designing the UI. Useful if you're building products and tired of placeholder text making it to production or error messages that just say "Error: something went wrong."
npx skills add https://github.com/owl-listener/designer-skills --skill ux-writing