frontend-prime
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).
What this skill does
# 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
<title>Page Title — Brand</title>
<meta name="description" content="150-160 chars">
<link rel="canonical" href="https://example.com/page">
<meta property="og:title/description/image/url" ...>
<meta name="twitter:card" content="summary_large_image">
```
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, `<button>` for actions / `<a>` for links, `aria-label` on icon buttons, 4.5:1 contrast, full keyboard nav
- **Perf**: `font-display: swap`, lazy load images with dimensions, `content-visibility: auto`, LCP<2.5s
- **Forms**: Visible labels always, validate on blur, helpful error messages, correct `input type` + `autocomplete`
- **Errors**: Error boundaries per section, custom 404/500, toast for feedback (auto-dismiss success, persist errors)
- **Security**: CSP headers, never unsanitized `dangerouslySetInnerHTML`, validate URLs in `href`, httpOnly cookies for auth, server-side validation
Related in Design
contribute
IncludedLocal-only OSS contribution command center. Auto-refreshes the user's in-flight PR and issue state on invoke so conversations start with full context — no need to brief Claude on what's in flight. Helps the user find issues to contribute to on GitHub, builds per-repo dossiers of what each upstream expects (CLA, DCO, branch convention, AI policy, draft-first, review bots, issue templates), runs deterministic gates before any external action so AI-assisted contributions don't reach maintainers as slop. State is markdown-only: candidate files at ~/.contribute-system/candidates/, repo dossiers at ~/.contribute-system/research/, append-only event log at ~/.contribute-system/log.jsonl. No database, no cloud calls. Use when the user asks about their PRs / issues / contributions, wants to find new work to take on, claim an issue, build/refresh a repo's dossier, or draft a Design Issue or PR. Trigger with "/contribute", "what's my PR status", "find a contribution", "claim issue X", "draft a Design Issue for Y", "refresh dossier for Z".
architectural-analysis
IncludedUser-triggered deep architectural analysis of a codebase or scoped subtree across eight modes — information architecture, data flow, integration points, UI surfaces, interaction patterns, data model, control flow, and failure modes. This skill should be used when the user asks to "diagram this codebase," "map the architecture," "show the data flow," "give me an ERD," "trace control flow," "find the integration points," "verify the layout pattern," "audit the UX architecture," or any similar request whose primary deliverable is mermaid diagrams plus cited reports under docs/architecture/. Dispatches haiku/sonnet sub-agents in parallel for per-mode exploration, then verifies every citation mechanically before any node lands in a diagram. Not for one-off prose explanations of code (use code-explanation) or for high-level system design from scratch (use system-design).
mcp
IncludedModel Context Protocol (MCP) server development and tool management. Languages: Python, TypeScript. Capabilities: build MCP servers, integrate external APIs, discover/execute MCP tools, manage multi-server configs, design agent-centric tools. Actions: create, build, integrate, discover, execute, configure MCP servers/tools. Keywords: MCP, Model Context Protocol, MCP server, MCP tool, stdio transport, SSE transport, tool discovery, resource provider, prompt template, external API integration, Gemini CLI MCP, Claude MCP, agent tools, tool execution, server config. Use when: building MCP servers, integrating external APIs as MCP tools, discovering available MCP tools, executing MCP capabilities, configuring multi-server setups, designing tools for AI agents.
react-native-skia
IncludedDesign, build, debug, and optimise high-polish animated graphics in React Native or Expo using @shopify/react-native-skia, Reanimated, and Gesture Handler. Use when the user wants canvas-driven UI, shaders, paths, rich text, image filters, sprite fields, Skottie, video frames, snapshots, web CanvasKit setup, or performance tuning for custom motion-heavy elements such as loaders, hero art, cards, charts, progress indicators, particle systems, or gesture-driven surfaces. Also use when the user asks for fluid, glow, glass, blob, parallax, 60fps/120fps, or GPU-friendly animated effects in React Native, even if they do not explicitly say "Skia". Do not use for ordinary form/layout work with standard views.
plaid
IncludedProduct Led AI Development — guides founders from idea to launched product. Six capabilities: Idea (discover a product idea), Validate (pressure-test the idea against fatal flaws, problem reality, competition, and 2-week MVP feasibility), Plan (vision intake + document generation), Design (translate image references into a design.md spec), Launch (go-to-market strategy), and Build (roadmap execution). Use when someone says "PLAID", "plaid idea", "help me find an idea", "product idea", "idea from my business", "idea from my expertise", "plaid validate", "validate my idea", "pressure-test", "is this idea good", "find fatal flaws", "validate the problem", "plan a product", "define my vision", "generate a PRD", "product strategy", "plaid design", "design from image", "translate image to design", "create design.md", "extract design tokens", "plaid launch", "go-to-market", "launch plan", "GTM strategy", "launch playbook", "plaid build", "build the app", "start building", or "execute the roadmap".
nextjs-framer-motion-animations
IncludedAdds production-safe Motion for React or Framer Motion animations to Next.js apps, including reveal, hover and tap micro-interactions, whileInView, stagger, AnimatePresence, layout and layoutId transitions, reorder, scroll-linked UI, and lightweight route-content transitions. Use when the user asks to add, refactor, or debug Motion or Framer Motion in App Router or Pages Router codebases, especially around server/client boundaries, reduced motion, LazyMotion, bundle size, hydration, or route transitions. Avoid for GSAP-style timelines, WebGL or 3D scenes, heavy scroll storytelling, or CSS-only effects unless Motion is explicitly requested.