The gap between "AI-generated UI" and "designed UI" is taste — spacing, hierarchy, typography, restraint. Design skills close that gap by encoding real design judgment as instructions, and they're consistently among the most-installed skills in the directory.
What design skills actually do
A good design skill doesn't say "make it pretty". It imposes a system:
Layout discipline — consistent spacing scales, grid alignment, breathing room rules.Typography systems — type scales, weight hierarchies, line-height ratios instead of ad-hoc font sizes.Color restraint — monochrome-first palettes, one accent, contrast requirements.Component conventions — states (hover, focus, disabled) defined up front, not bolted on.Install one and every UI Claude generates follows the system — including a11y details (focus rings, reduced-motion) most generated UIs skip.
Picks by job
Frontend polish — the most-installed frontend-design skills (including Anthropic's first-party one) are the safest starting point; see design-category skills.Design systems work — skills that read your tokens and existing components before generating anything new.Design review — skills that critique a screen against heuristics (hierarchy, contrast, alignment) and produce actionable notes.How to combine them
One design-taste skill + one code-review skill + your framework's skill is the standard stack: taste, correctness, and idiom. They compose — that's the point of the format.
Live rankings by install count: Design skills.