Design e Frontend

Use when a feature launch needs experiment design, test sequencing, rollout guardrails, and measurement logic before exposure to users.

React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements.

Use when legacy prompts or older framework flows reference `build-error-resolver` and you need the modern runtime to resolve that capability cleanly.

Review a pull request or contribution deeply, explain it tutorial-style for a maintainer, and produce a polished report artifact such as HTML or Markdown. Use when asked to analyze a PR, explain a contributor's design decisions, compare it with similar systems, or prepare a merge recommendation.

Use when starting any conversation - establishes how to find and use skills, requiring Skill tool invocation before ANY response including clarifying questions

You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.

Generate Playwright tests. Use when user says \"write tests\", \"generate tests\", \"add tests for\", \"test this component\", \"e2e test\", \"create test for\", \"test this page\", or \"test this feature\".

Review a pull request or contribution deeply, explain it tutorial-style for a maintainer, and produce a polished report artifact such as HTML or Markdown. Use when asked to analyze a PR, explain a contributor's design decisions, compare it with similar systems, or prepare a merge recommendation.

Import UI screenshots and generate uxscii components automatically using vision analysis. Use when user wants to import, convert, or generate .uxm components from screenshots or images.

Utilize quando o usuário mencionar Stark, UI/UX, fluxo de produto, jornada do usuário, onboarding, checkout, formulários, dashboards, arquitetura da informação, design de estado, usabilidade, qualidade de design frontend, auditorias de design, tradução de design, planejamento de ativos, geração de imagens para UI, referências visuais, animação, movimento, rolagem, técnicas de interação, design tokens ou design de aplicativo/site não genérico. Esta skill encaminha o agente.

Orientação de melhores práticas para o monorepo SojuStack (NestJS + Drizzle + Better Auth + TanStack Start). Use ao editar arquivos em apps/api ou apps/web, projetar rotas, padrões de consulta/formulário, fluxos de autenticação/transação ou implementar recursos entre stacks.

Desenvolva Frontend profissionalmente com Angular, React, Vue e Next.js.