Use this skill whenever the user asks you to review, critique, audit, score, or improve a UI, frontend component, layout, or design mockup. Also trigger if they ask about UX best practices, user experience, cognitive load, accessibility, or whether a design is user-friendly. This skill provides a principles-first framework for evaluating UI code and designs against 25+ established psychological principles, WCAG 2.2 accessibility criteria, and Nielsen's 10 usability heuristics, with a quantitative scoring rubric and optional platform overlays.
2026-05-19