Run a systematic usability audit against Nielsen's 10 heuristics, the standard framework UX professionals use to catch interface problems before user testing. You feed it interface descriptions, screenshots, or user flows, and it evaluates everything from system feedback visibility to error recovery. This is basically a structured checklist turned into an agent skill, which sounds tedious until you realize how easy it is to miss obvious usability issues when you're deep in implementation. Covers all ten heuristics with specific violation patterns to look for. Pairs well with accessibility audits if you're doing a comprehensive design review. Best used when you need documented findings to justify UX debt or compare design alternatives.
npx skills add https://github.com/mastepanoski/claude-skills --skill nielsen-heuristics-audit