Art & Design

Commit a finished change on develop the way this repo expects - yarn verify, semver bump, CHANGELOG entry, own files staged by name, version in the subject, push. Use whenever a change is ready to commit.

Personal developer blog and portfolio design with a narrow reading column, serif post text, warm neutrals and one green accent, light and dark mode with a toggle, writing grouped by year, reading time, post outline, author box, previous and next posts, project tiles with tech pills and an experience timeline.

Comprehensive patterns for Next.js 14+ App Router architecture, Server Components, and modern full-stack React development.

Accessibility patterns for React and Next.js — semantic HTML, ARIA attributes, form labeling, keyboard navigation, focus management, and screen reader support. Use when building or reviewing forms, modals, dropdowns, tooltips, or tabs, fixing a11y lint or code-review findings, or wiring up keyboard navigation and focus management.

Create API handoff documentation for frontend developers. Use when backend work is complete and needs to be documented for frontend integration, or user says 'create handoff', 'document API', 'frontend handoff', or 'API documentation'.

Invoke for frontend UI/UX best practices: responsive design, mobile adaptation, accessibility (a11y), animation performance, CSS, layout, component libraries, theming, dark mode, screens/resolutions, fonts, typography, color, interaction, UX, design systems, form validation, loading/empty/error states, navigation, route transitions, micro-interactions. Chinese triggers: 响应式 / 移动端适配 / 无障碍 / a11y / 动画 / 布局 / 组件库 / 主题 / 暗黑模式 / 排版 / 设计系统 / 微交互.

Next.js 16+ and Turbopack guidance — incremental Rust bundling, file-system caching, faster dev startup and HMR, Turbopack vs webpack tradeoffs, and the middleware.ts to proxy.ts filename change. Use when developing or debugging Next.js 16+ apps, diagnosing slow dev startup or hot reload, choosing between bundlers, or reviewing middleware/proxy file naming.

Read-only technical and conversion audit of a live website, made as the before-rebuild snapshot of a B2B site. Crawls up to N same-origin pages (default 10) in headless Chrome and checks mobile layout at 360/390/768 px, bugs (console errors, failed requests, broken links and images, forms without submitting them), accessibility (axe-core, WCAG 2.1 A/AA), performance (Lighthouse or browser timing), the lead path (CTA in the first screen on desktop and phone, contact within 2 clicks, contact info, trust markers) and SEO basics. Writes one markdown report with scores per area, findings P0-P3 (what, where, why it costs leads, fix) and a snapshot to compare after the rebuild, plus raw JSON. Use when the user says "audit this site", "what's wrong with this website", "website audit", "check this URL", "аудит сайту", "технічний аудит сайту", "перевір сайт", "що не так із сайтом". NOT a copywriting audit (use website-copy-reframe), NOT a design system (use design-system-generator).

Extract any website's design system into an agent-ready DESIGN.md using Firecrawl scrape evidence. Use when the user wants colors, fonts, spacing, components, layout patterns, or brand/UI guidance from a website so AI agents can create new websites, clone a look, or build pages inspired by that design.

>- Build and improve user interfaces with coherent visual design, responsive layout, accessible interaction, and reliable state. Use for pages, components, forms, frontend behavior, and UI polish. Follow the project's framework and design system and verify rendered behavior rather than relying on source or screenshots alone.

Document frontend data needs for backend developers. Use when frontend needs to communicate API requirements to backend, or user says 'backend requirements', 'what data do I need', 'API requirements', or is describing data needs for a UI.

Set an ECC-specific frontend design direction for production UI work. Use when building or improving websites, dashboards, applications, components, landing pages, visual tools, or any web UI that needs stronger product-specific design judgment.

Next.js App Router principles. Server Components, data fetching, routing patterns.

Frontend development patterns for React, Next.js, state management, performance optimization, and UI best practices.

Frontend development guidelines for React/TypeScript applications. Modern patterns including Suspense, lazy loading, useSuspenseQuery, file organization with features directory, MUI v7 styling, TanStack Router, performance optimization, and TypeScript best practices. Use when creating components, pages, features, fetching data, styling, routing, or working with frontend code.

Expert integration of Supabase Auth with Next.js App Router Use when: supabase auth next, authentication next.js, login supabase, auth middleware, protected route.

Comprehensive frontend development skill for building modern, performant web applications using ReactJS, NextJS, TypeScript, Tailwind CSS. Includes component scaffolding, performance optimization, bundle analysis, and UI best practices. Use when developing frontend features, optimizing performance, implementing UI/UX designs, managing state, or reviewing frontend code.

Tailwind CSS v4 principles. CSS-first configuration, container queries, modern patterns, design token architecture.

Design and build a marketing site, landing page, product homepage, or an app's UI and login/signup pages end to end — reference screenshots and image-gen drafts the user approves first, then a unified page system, an art direction and motion plan derived from the brief, component and animation libraries chosen to fit the project, i18n, and accessibility/e2e verification. Use when the user asks to design, redesign, restyle or polish an official website, landing page, homepage or its subpages, an app's screens (workbench, chat/agent UI, dashboards) or its auth pages, asks for UI reference sites, or says the current design looks bad, fragmented or lacks motion.

Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, artifacts, posters, or applications (examples include websites, landing pages, dashboards, React components, HTML/CSS layouts, or when styling/beautifying any web UI). Generates creative, polished code and UI design that avoids generic AI aesthetics.

Design or fix client, URL, and server state ownership, including request races, optimistic updates, and session changes.

Build modern web applications with React, Vue, Angular, or Svelte, focusing on performance and accessibility. Use when you need component library development, TypeScript UI implementation, responsive layouts with CSS Grid and Flexbox, Core Web Vitals optimization, service worker offline support, code splitting, ARIA accessibility, Storybook integration, or frontend API client architecture.

Expert guidance for integrating and building applications with shadcn/ui components, including component discovery, installation, customization, and best practices.

Generate a premium mockup website for a prospect using the buildinamsterdam.com template style. Use when user asks to design a website, create a mockup, or build a prospect website.