UI Design Review

When to Use

Use this skill when you need review UI code for design system compliance, accessibility, and best practices.

When NOT to use

• For accessibility-only issues → use /ss-a11y
• For Nielsen UX heuristics → use /ss-audit
• For a quick automated check → use /ss-lint
• For non-UI code (data fetching, business rules)

Review the file: $ARGUMENTS

Checklist

1. Design Token Compliance

• No hardcoded hex colors (use semantic tokens: text-foreground, bg-brand, etc.)
• No hardcoded px spacing in Tailwind (use p-6 not p-[24px])
• Shadows use CSS variables (shadow-[var(--shadow-card)])
• Border radius follows the scale (rounded-md, rounded-lg, rounded-2xl)

2. Component Conventions

• Uses data-slot attribute
• Uses cn() for className merging
• Props typed with React.ComponentProps<>
• Supports className prop override
• Named export (not default export for components)
• No wrapper components that only add a className

3. Accessibility (a11y)

• Touch targets >= 44x44px for interactive elements
• focus-visible styles on all interactive elements
• Proper aria-* attributes where needed
• Color contrast meets WCAG AA (4.5:1 for text, 3:1 for large text)
• Animations respect prefers-reduced-motion
• Images have alt text
• Form inputs have associated labels

4. Mobile Best Practices

• No horizontal overflow
• Touch-friendly spacing between interactive elements
• Safe area insets handled for notched devices
• Text sizes >= 12px for readability
• Scrollable containers have -webkit-overflow-scrolling: touch

5. Performance

• No unnecessary re-renders (stable references, memoization where needed)
• Images are lazy-loaded
• Heavy components are code-split

6. Typography

• Uses the Pretendard/Inter font stack
• Font sizes from the 14-step scale (10-48px, see CLAUDE.md)
• Proper font weights (400, 500, 600, 700)
• Display text (36-48px): leading-none + tracking-[-0.02em]
• Heading text (18-24px): leading-snug + tracking-[-0.01em]
• Body text (14-17px): leading-normal (no custom tracking)
• Caption uppercase (10-13px): tracking-[0.05em] or tracking-wide
• No line-height: 1.5 on display/heading text (too loose)

7. Spacing Consistency

• All spacing values are multiples of 6px (p-1.5, p-3, p-6, etc.)
• No arbitrary spacing (p-5=20px, gap-3.5=14px are violations)
• Uses size-* shorthand instead of w-* h-*
• Uses ms-*/me-* instead of ml-*/mr-* (logical properties)
• Motion transitions use design tokens (duration-[var(--duration-fast)])

8. Coherence (VISUAL-CRAFT.md §C0 — the "one choice per axis" laws)

The biggest reason a UI reads as "AI-generated" isn't ugly parts — it's mixed parts. Check that each axis below uses ONE value system-wide; flag a mix as a real issue, not a nitpick.

• One radius personality — sharp (0-4px) OR soft (8-12px) OR pill, applied to every card/button/input/modal. No mixing (e.g. a rounded-none panel with rounded-full buttons).
• One accent color for interactive emphasis (+ semantic red/green/amber only) — not two+ competing accents.
• No emoji as UI icons (🚗🧺⭐ as list/nav/status/category markers) — they inject many uncontrolled hues; use one line-icon set in currentColor.
• Status color = severity, not decoration — a normal/OK/"보통" state is neutral grey (not colored); color marks only the minority of rows that need attention; same value → same color.
• No decorative hues — favorite stars, category dots, avatars use the accent or grey, not a new color each.
• One shadow language — same light direction, same scale/tint; not some black + some tinted, some up-lit + some down-lit.
• One icon family / fill mode / stroke weight across the file.
• Nested-radius law — an element inside a rounded container uses inner = outer − padding, not the same radius (which bulges).
• Consistent control heights — buttons, inputs, selects share a height set (e.g. 40px).
• Errors/states never rely on color alone (icon + text too).

Output Format

Provide:

1. Score: Pass / Needs Improvement / Fail
2. Issues: List each violation with file:line reference
3. Fixes: Concrete code changes for each issue

Example

User request:

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