---
name: frontend-prime
description: >
Build distinctive, production-grade frontend interfaces. Use when creating any web UI —
sites, apps, dashboards, components. Focuses on design quality and avoiding generic AI
aesthetics. Composable with other skills (docx, pdf, xlsx).
---
# Ultimate Frontend Skill
Every output must feel intentionally crafted — never generic, never "AI slop."
---
## 1. Design Before Code
Before writing ANY code, decide:
1. **Aesthetic direction** (pick ONE, match it to the product's audience):
Brutally minimal · Maximalist editorial · Retro-futuristic · Organic/natural · Luxury/refined · Playful · Brutalist · Art deco · Dark/moody · Lo-fi/zine · Handcrafted · Swiss/international · Neo-glassmorphic · Industrial · Soft/pastel
2. **One unforgettable element**: a scroll animation, a bold typographic moment, a micro-interaction — something memorable.
3. **Then commit fully.** Half-hearted design = generic output.
---
## 2. The AI Slop Blacklist
These instantly mark output as AI-generated. **Never:**
- Purple/blue gradient on white cards
- Every element with identical `rounded-xl`
- Perfectly centered, symmetrical layouts with no visual tension
- `text-gray-600` on everything
- Cards in a perfect 3-column grid with identical heights
- Rainbow or evenly-distributed color schemes
- Generic hero with stock illustration placeholder
**Instead, always:**
- Load distinctive Google Fonts (Instrument Serif, DM Sans, Clash Display, Bricolage Grotesque, Syne, Fraunces, Cabinet Grotesk, Satoshi, Young Serif, Outfit)
- One dominant color doing 80% of the work + one sharp accent
- Asymmetric layouts, grid-breaking elements, dramatic scale jumps
- Atmosphere via gradient meshes, noise textures, glassmorphism, or depth layers
- Generous negative space as a design element
- Negative `letter-spacing` on large headings, `text-wrap: balance` on headlines
- Body text `max-width: 65ch`, `line-height: 1.5–1.7`
---
## 3. Color & Theming — Do It Right
Define colors as CSS custom properties with semantic names. Never hardcode hex in components.
```css
[data-theme="light"] {
--bg-primary: #fafafa; --bg-secondary: #ffffff;
--text-primary: #18181b; --text-secondary: #52525b;
--accent: #2563eb; --border: #e4e4e7;
}
[data-theme="dark"] {
--bg-primary: #09090b; --bg-secondary: #18181b;
--text-primary: #fafafa; --text-secondary: #a1a1aa;
--accent: #3b82f6; --border: #27272a;
}
```
Dark mode rules: higher elevation = lighter surface, desaturate accents ~15%, use borders not shadows for hierarchy, offer Light/Dark/System toggle, persist in localStorage and apply before paint.
---
## 4. SEO — Claude Forgets This
Every page needs:
```html
Page Title — Brand
```
Also: JSON-LD structured data, `sitemap.ts` + `robots.ts`, one `h1` per page, no skipped heading levels, descriptive `alt` text, clean lowercase hyphenated URLs, `hreflang` for i18n.
In Next.js: use `metadata` export with `metadataBase`, `openGraph`, `twitter`, `alternates.canonical`.
---
## 5. Quick Reminders
- **Motion**: Stagger entrances, hover states on all interactives, `0.2s ease` micro-interactions, always respect `prefers-reduced-motion`
- **Mobile**: Mobile-first, `clamp()` for fluid type/spacing, `dvh` not `vh`, 44×44px touch targets
- **A11y**: Semantic HTML, `