Frontend

Use when creating, improving, or troubleshooting Claude Code subagents. Expert guidance on agent design, system prompts, tool access, model selection, and best practices for building specialized AI assistants.

ReactでSPAフロントエンドを実装・改修するためのガイド。バックエンド分離前提でNext.jsやサーバーサイド機能に依存せず、React Router中心のクライアント実装を行う時に使う。認証はAuthProviderとuseAuthカスタムフックで統一し、OpenAPIからorvalまたはopenapi-typescriptで型/クライアントを生成して利用する。ESLint+Prettier、zod、shadcn/ui、デザイントークン（CSS変数/Tailwindテーマ）を前提にする場合に適用する。ディレクトリ構成はmodules/components/hooks/providers/servicesなどの直感的な命名で複雑化に耐える構成にする。

Use this skill when developing Next.js 16+ applications - creating pages, components, layouts, API routes, implementing proxy.ts, adding caching with Cache Components, or refactoring frontend code. This includes working with App Router patterns, Server Components, Server Actions, React 19+ features, and Tailwind CSS v4.

Expert guidance for building LLM applications with LangChain framework - chains, prompts, memory, retrievers, and integrations.

Next.js development tooling via MCP. Inspect routes, components, build info, and debug Next.js apps.Use when working on Next.js applications, debugging routing, or inspecting app structure.NOT for general React or non-Next.js projects.

Next.js content model with visual editing for Netlify.

Cloudflare deployment for frontend (Pages) and backend (Workers). Covers secrets, environment variables, custom domains, and production configuration.

scArches 单细胞深度学习参考图谱框架 - 100%覆盖文档（26个HTML文件，包含完整API、教程、模型训练、多模态整合）

Use when configuring Karabiner-Elements keyboard customizations, before writing JSON - provides systematic workflow for complex modifications with correct structure, common patterns, and guidance on manual vs generator approaches

Performance optimization toolkit for Astro SSG sites. Analyzes and applies optimizations including resource preloading (fonts, images, CSS), page prefetching, image loading strategies (lazy/eager, fetchpriority), and configuration improvements. Use when the user asks to optimize an Astro site, improve Astro performance, add preloading, configure prefetching, or speed up their Astro build. Handles both automatic safe optimizations and user-confirmed risky optimizations.

Use quality dependencies freely - default to using existing libraries over reinventing. For Python prefer conda over pip, maintain separate requirements-conda.txt and requirements-pip.txt. Use when adding dependencies, installing packages, or evaluating whether to use a library.

Debug issues in the Second Brain Nuxt 4 + @nuxt/content v3 project. Use for any bug, test failure, or unexpected behavior.

Look up Fannie Mae underwriting guidelines for income, assets, credit, or collateral verification. Use when questions involve DTI, income documentation, asset requirements, credit standards, or any B3/B4 guideline references. Reads guidelines dynamically from configs/guidelines/ - never hardcodes content.

Documentation generation patterns for technical specs, API docs, user guides, and knowledge bases using real tools like Sphinx, MkDocs, TypeDoc, and Nextra. Use when creating docs from code, building doc sites, or automating documentation workflows.

Create consistent, high-quality educational programming exercises or tutorials following strict template guidelines. Use this skill whenever you need to create or refine a programming exercise or tutorial for your course. Automatically applies template structure, formatting rules, and quality verification.

Comprehensive Docker containerization workflow covering multi-stage builds, docker-compose orchestration, image optimization, debugging, and production best practices. Use when containerizing applications, setting up development environments, or deploying with Docker.

Default testing standard for all implementation work - ensures code actually works through mandatory execution validation before confirming to user. Applies automatically whenever writing, modifying, debugging, or implementing any code (scripts, APIs, UI, configs, data operations, logic changes). This is the baseline expectation, not an optional extra - every implementation must be verified through actual execution, not assumed correct.

Submit complex code questions to OpenAI GPT-5 Pro for deep analysis when you have 20 minutes. Use when the user asks for architectural analysis, comprehensive code review, debugging complex issues, or requests expert analysis of their codebase that requires extended reasoning. Automatically handles file selection, code packing with Repomix, cost estimation, long-running API requests, and result presentation.

Use this skill when developing Next.js/React frontend code for Brokle. Includes components, pages, hooks, API clients, stores, or any frontend features.

Running precommit checks and build validation. ALWAYS use after ANY code changes.