Web & Frontend

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Manage server state with TanStack Query (React Query). Covers data fetching, caching, mutations, optimistic updates, infinite queries, and prefetching. Use for API integration, server state management, and data synchronization in React applications.

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Zodライブラリによるランタイムバリデーション、スキーマ定義、TypeScript型推論を専門とするスキル。 型安全なバリデーションロジックを設計・実装し、API・フォーム・ドメイン層での検証を網羅する。 Anchors: • Zod Official Documentation / 適用: スキーマAPI・バリデーション / 目的: 公式パターン準拠 • Effective TypeScript (Dan Vanderkam) / 適用: 型設計・型推論 / 目的: ランタイム安全性担保 • @hookform/resolvers / 適用: フォーム統合 / 目的: React Hook Form連携 Trigger: Use when implementing runtime validation with Zod, defining TypeScript schemas, integrating form validation (react-hook-form), or validating API requests/responses. Keywords: zod, schema, safeParse, refine, z.infer, zodResolver.

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Optimize application performance for speed, efficiency, and scalability. Use when improving page load times, reducing bundle size, optimizing database queries, or fixing performance bottlenecks. Handles React optimization, lazy loading, caching, code splitting, and profiling.

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Comprehensive testing patterns for Jest, Vitest, Playwright, and React Testing Library. Use when writing unit tests, integration tests, or E2E tests.

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Next.js best practices - file conventions, RSC boundaries, data patterns, async APIs, metadata, error handling, route handlers, image/font optimization, bundling

majiayu000 Bundle

Ensure UI components are accessible to all users including those using assistive technologies through semantic HTML, keyboard navigation, ARIA attributes, color contrast, and screen reader compatibility. Use this skill when building UI components, forms, interactive elements, modals, or any frontend code in React, Vue, or plain HTML that needs WCAG compliance. Applies when adding navigation elements, buttons, inputs, focus management, alternative text, or testing with screen readers to ensure inclusive user experiences.

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Build scalable design systems with Tailwind CSS, design tokens, component libraries, and responsive patterns. Use when creating component libraries, implementing design systems, or standardizing UI patterns.

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Use ONLY when creating NEW registrable components in ML projects that require Factory/Registry patterns. ✅ USE when: - Creating a new Dataset class (needs @register_dataset) - Creating a new Model class (needs @register_model) - Creating a new module directory with __init__.py factory - Initializing a new ML project structure from scratch - Adding new component types (Augmentation, CollateFunction, Metrics) ❌ DO NOT USE when: - Modifying existing functions or methods - Fixing bugs in existing code - Adding helper functions or utilities - Refactoring without adding new registrable components - Simple code changes to a single file - Modifying configuration files - Reading or understanding existing code Key indicator: Does the task require @register_* decorator or Factory pattern? If no, skip this skill.

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Expert in Template Project backend architecture, service patterns, testing, and API development using Express.js, TypeScript, and Drizzle ORM. Use when implementing backend services, APIs, controllers, database queries, error handling, testing server code, or writing migrations.

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Error handling and reporting patterns for both frontend and backend in PastCare

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Use this skill for ANY work involving React, Next.js, TypeScript, or Tailwind in the browser layer. This includes building components and pages, but equally covers debugging and fixing frontend issues: CSS/Tailwind classes not applying, form validation behavior, hydration mismatches between server and client renders, styling bugs, layout shifts, and rendering problems. Also use for refactoring components (e.g., splitting Server vs Client Components), data fetching patterns, state management, bundle optimization, and frontend tooling. If the problem involves what users see or interact with in a web browser — whether building, fixing, or refactoring — use this skill. Not for backend APIs, databases, infrastructure, or DevOps.

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Frontend development patterns for LivestockAI. Use when implementing React components, TanStack Router routes, UI components, or working with the offline-first PWA architecture.

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React and Next.js performance playbook distilled from Vercel Engineering guidance. Use when building, reviewing, or refactoring React/Next.js code for waterfalls, bundle size, rendering cost, and client/server data flow.

majiayu000 Bundle

在构建需要组件架构、hooks 模式或状态管理的 React 18+ 应用程序时使用。调用时机包括：Server Components、性能优化、Suspense 边界、React 19 特性。

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React Native patterns for mobile app development with Expo and bare workflow. Trigger: When building mobile apps, working with React Native components, using Expo, React Navigation, or NativeWind.

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Build type-safe React applications with TanStack Router. Covers file-based routing, type-safe params, search params, loaders, and code splitting. Use for React SPAs requiring type-safe navigation, nested layouts, and data loading patterns.

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LaTeX 模板高保真优化器，支持任意 LaTeX 模板的样式参数对齐、标题文字对齐、标题格式对比（加粗）、HTML 可视化报告、LaTeX 自动修复建议和像素级 PDF 对比验证

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Next.jsアプリケーションのパフォーマンス最適化スキル。 Core Web Vitals（LCP、FID、CLS）改善、バンドルサイズ削減、画像・フォント最適化を提供する。 Anchors: • 『High Performance Browser Networking』(Ilya Grigorik) / 適用: ネットワーク最適化 / 目的: レイテンシ削減 • Web Vitals (Google) / 適用: Core Web Vitals測定 / 目的: UXメトリクス改善 • Next.js Documentation / 適用: next/image, next/font, App Router / 目的: フレームワーク最適化 Trigger: Use when optimizing Core Web Vitals (LCP, FID, CLS), reducing bundle size, implementing image optimization with next/image, or optimizing font loading with next/font.

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Define authentication flow using JWT between frontend and backend. This skill should be used when designing the overall authentication architecture, planning token flow between frontend and backend, establishing token format and claims structure, and defining authentication state machine.

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WCAG 2.2 compliance testing, screen reader validation, and inclusive design verification. Use when ensuring legal compliance (ADA, Section 508), testing for disabilities, or building accessible applications for 1 billion disabled users globally.

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> Responsive tasarım ve modern CSS özellikleri.

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Backend architecture patterns, API design, database optimization, and server-side best practices for Next.js API routes and tRPC.

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Use when choosing, implementing, or reviewing browser storage such as localStorage, sessionStorage, IndexedDB, cookies, client persistence, offline data, secure storage, or cleanup strategy; Chinese triggers include 浏览器存储, 客户端持久化.

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Form validation patterns for both frontend (Angular) and backend (Spring) in PastCare

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Framer Motion animation patterns. Use when adding animations, transitions, gestures, or layout animations to React applications. Covers performance optimization and accessibility.

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前端页面开发。当用户需要开发 Web 应用、创建 UI 组件、实现交互功能或优化前端性能时使用此技能。

majiayu000 Bundle

Enterprise TypeScript with strict typing and modern ecosystem TypeScript 5.9.3, Next.js 16, Turbopack, React 19, tRPC, Zod for type-safe schemas; activates for full-stack development, API contract definition, type safety enforcement, and framework-agnostic TypeScript patterns.

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Master Next.js 16+ App Router with Server Components, streaming, parallel routes, and advanced data fetching. Use when building Next.js applications, implementing SSR/SSG, or optimizing React Server Components.

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Next.js App Router patterns including server components, route handlers, middleware, parallel routes, intercepting routes, streaming, and caching strategies. Use when the user is building with Next.js 13+/14+/15+, asking about the App Router, server components vs client components, route handlers, Next.js middleware, or Next.js caching and revalidation. Trigger on any mention of Next.js, App Router, server components, or Next.js API routes.

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Build with Next.js for BigCommerce — App Router, Server/Client Components, data fetching, ISR, middleware, API routes, and Catalyst patterns. Use when building headless BigCommerce storefronts with Next.js.

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Provides comprehensive project folder structure design guidelines and best practices. Defines standard directory organizations for diverse project types including monorepos, web frameworks, backend services, libraries, and extensions. Ensures scalable, maintainable architecture through consistent file organization patterns. Specializes in separation of concerns, modular architecture, and tooling integration. Use when: designing new project structures, organizing monorepo workspaces with tools like Turborepo/Nx, structuring NestJS backend projects, organizing React/Next.js frontend applications, designing Go service architectures, creating NPM package structures, organizing VSCode extension projects, structuring Chrome extension codebases, planning directory hierarchies, migrating legacy project structures, or establishing code organization conventions for teams.

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Apply React and Next.js performance optimization guidelines from Vercel Engineering — 40+ rules covering components, data fetching, bundle optimization, and rendering. Triggers on React components, Next.js pages, bundle optimization, performance improvements, refactoring React code.

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Master modern React state management with Redux Toolkit, Zustand, Jotai, and React Query. Use when setting up global state, managing server state, or choosing between state management solutions.

majiayu000 Bundle

用于加载状态、错误处理和数据获取的现代React UI模式。在构建UI组件、处理异步数据或管理UI状态时使用。

majiayu000 Bundle

Master React state management with Zustand, Redux Toolkit, Jotai, and React Query. Covers global state, server state, atomic state, and persistence patterns. Use for complex applications requiring scalable state architecture.

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Svelte 5 patterns including TanStack Query mutations, shadcn-svelte components, and component composition. Use when writing Svelte components, using TanStack Query, or working with shadcn-svelte UI.