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YepAPI/skills

Core Web Vitals, lazy loading, code splitting e análise de bundle.

O que é skills?

O YepAPI/skills é uma skill de performance web que orienta desenvolvedores a otimizar aplicações web modernas (React, Next.js). Ela define regras claras para métricas de Core Web Vitals (LCP < 2.5s, INP < 200ms, CLS < 0.1), carregamento lazy de imagens e componentes, divisão de código por rotas, otimização de imagens (WebP/AVIF), análise de bundle com @next/bundle-analyzer, estratégias de cache e indexação de banco de dados. Projetada para ambientes baseados em React e Next.js, ela ajuda a melhorar a experiência do usuário e o desempenho em produção, evitando mudanças de layout e reduzindo o tamanho dos bundles.

Funciona com~Claude Code~Codex CLI~Cursor
npx skills add https://github.com/YepAPI/skills/tree/HEAD/skills/performance
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Documentação

Performance

Regras

  • Core Web Vitals: LCP < 2.5s, INP < 200ms, CLS < 0.1
  • Carregamento lazy de imagens abaixo da dobra e componentes pesados: React.lazy(), next/dynamic
  • Divisão de código por rotas — cada página carrega apenas seu próprio código
  • Otimizar imagens: formato WebP/AVIF, dimensionamento adequado, next/image com sizes
  • Análise de bundle: @next/bundle-analyzer — identificar dependências grandes
  • Cache: cabeçalhos de cache HTTP, service worker para visitas repetidas, stale-while-revalidate
  • Banco de dados: indexar colunas frequentemente consultadas, usar EXPLAIN ANALYZE para encontrar consultas lentas
  • Evitar mudanças de layout: definir dimensões explícitas em imagens, vídeos e incorporações

Individual skills in this repo

This repo contains 20 individual skills — each has its own dedicated page.

YepAPI/skills

WCAG 2.1 AA — semantic HTML, keyboard navigation, screen readers.

YepAPI/skills

Experiment setup, variant splitting, statistical significance, and feature flag integration.

YepAPI/skills

CRUD generators, data tables, user management, role-based access, and bulk operations.

YepAPI/skills

Monitor what ChatGPT and Gemini say about your brand using YepAPI.

YepAPI/skills

Queue workers with BullMQ/Inngest/Trigger.dev, job retries, dead letter queues, concurrency.

YepAPI/skills

Commander.js, interactive prompts with Clack, spinners, colors, config files, exit codes, and npm publishing.

YepAPI/skills

cmdk integration, Cmd+K trigger, fuzzy search, grouped actions, keyboard navigation, and dynamic action registration.

YepAPI/skills

Content planning with trend and sentiment data from YepAPI.

YepAPI/skills

Content calendar, keyword-driven planning, and content briefs.

YepAPI/skills

Theme switching with CSS variables, system preference detection, next-themes, and persistence.

YepAPI/skills

Threaded comments, @mentions, reactions, moderation queue, optimistic UI, and cursor pagination.

YepAPI/skills

Competitive analysis between domains using YepAPI.

YepAPI/skills

Layout grids, KPI cards, data tables with sorting/filtering, sidebar navigation, and responsive breakpoints.

YepAPI/skills

Data encryption — TLS everywhere, AES-256-GCM for PII, bcrypt passwords, encrypted backups.

YepAPI/skills

Chart patterns with Recharts/Nivo/D3, responsive containers, color scales, and accessibility.

YepAPI/skills

Drizzle schema definition, push vs migrate, type-safe queries, relations, transactions, and prepared statements.

YepAPI/skills

Upload handling, resize/compress, CDN delivery, blur placeholders, and next/image patterns.

YepAPI/skills

Local business and Google Maps research using YepAPI.

YepAPI/skills

Cursor-based pagination, IntersectionObserver, virtualized lists with @tanstack/react-virtual, and scroll position restoration.

YepAPI/skills

Chat UI components, streaming responses with AI SDK, context window management, and RAG patterns.

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