React & Next.js Skills for Claude Code, Codex & AI Agents

React Doctor

Million Software

Scan React projects for correctness, accessibility, security, architecture and performance findings; triage and fix issues with the upstream workflow.

• react
• code-review
• debugging

React Doctor Skills

Million Software

React Doctor workflows for scanning React code, planning fixes, inspecting Three.js and measuring runtime performance.

• react
• code-review

Brainstorming

obra

development skill for Claude AI. Grade A. You MUST use this before any creative work - creating features, building components, adding functionality, modifying behavior, or planning anything new, in software or out of it (a talk, a business, a renovation).

• development
• go
• react

React-PDF Documents

molefrog

Create reports, invoices and other PDFs with React components, reusable layouts, SVG graphics and controlled page breaks.

• pdf
• react
• document-generation

Improve Three.js

Million Software

Audit Three.js and React Three Fiber applications for frame-loop, GPU resource and visual problems.

• threejs
• react
• performance

React Email Templates

Resend

Create component-based HTML emails with React Email, reusable layout and styling, local previews, and rendered output for a sending provider.

• react-email
• html-email
• react

Sanity Form Suspense

Sanity

Add suitable Suspense boundaries to Sanity Studio custom form components.

• sanity
• react

Agent Elements skill

21st.dev

Use whenever the user wants to build or modify a chat, agent, or tool-calling UI in a React 19 + Tailwind v4 project — especially if the code imports from `@/components/agent-elements/*` or the project has that folder on disk. Triggers: "agent chat", "tool call UI", "streaming chat", "plan approval", "AgentChat", "InputBar", "tool renderer", mentions of Agent Elements, or requests to add a new agent surface with shadcn. Do NOT use for plain chat UIs that don't need tool/plan/approval cards, or for projects already committed to a different agent UI kit.

• react
• agent ui

UI Design

mblode

Designs and builds React/Next/Tailwind UI, audits visual and interaction defects, and stress-tests components with worst-case data. Use when asked to "build a landing page", "extract our design system", "add dark mode", "make this responsive", "remove UI slop", "audit this component", "stress-test this component", "break this UI", or "show me the worst case".

• react
• ui design

Remotion Best Practices

Remotion

Route Remotion video tasks to the relevant official guidance for composition, animation, preview and rendering.

• remotion
• react
• video

Agentation Setup

Benji Taylor, Dennis Jin, Alex Vanderzon

Add the Agentation visual-feedback toolbar to a React or Next.js project, choose manual feedback or MCP sync, and verify the selected connection.

• ui-design
• ux-design
• annotations

Ant Design CLI

Ant Design

Use when the user's task involves Ant Design (antd) — writing antd components, debugging antd issues, querying antd APIs/props/tokens/demos, migrating between antd versions, or analyzing antd usage in a project. Triggers on antd-related code, imports from 'antd', or explicit antd questions.

• ant design
• react

Vercel React View Transitions

vercel-labs

Guide for implementing smooth, native-feeling animations using React's View Transition API (`<ViewTransition>` component, `addTransitionType`, and CSS view transition pseudo-elements).

• react
• animation

Vercel Composition Patterns

vercel-labs

React composition patterns that scale.

• react
• components

Vercel React Best Practices

vercel-labs

React and Next.js performance optimization guidelines from Vercel Engineering.

• react
• performance

Improve React

Million Software

Survey a React codebase and turn prioritized findings into implementation plans without editing application source.

• react
• code-review
• planning

React Doctor Performance

Million Software

Diagnose a reproducible React interaction with browser traces, rendering evidence and a structured report.

• react
• performance
• debugging

Vercel Agent Skills

vercel-labs

Apply Vercel guidance for React composition, performance, React Native, View Transitions and deployment workflows.

• react
• development