setup

Installs and configures assistant-ui with the `assistant-ui` CLI (`create`, `init`, `add`, `update`, `upgrade`, `codemod`, `doctor`, `info`, `mcp`, `agent`) and picks the runtime adapter for a backend. Use for first-time install (`npx assistant-ui@latest create my-app` with templates `default`, `minimal`, `cloud`, `cloud-clerk`, `langchain`, `mcp`, `eve`, or `--example` scaffolds such as `with-ai-sdk-v7`, `with-langgraph`, `with-ag-ui`, `with-google-adk`, `with-eve`, `with-openui`, `with-expo`, `with-react-ink`), adding to an existing Next.js app (`init`), or keeping an install current (`update`, `upgrade`, `codemod`). Covers picking a runtime hook for a backend: `useChatRuntime` (AI SDK v7 via `@assistant-ui/ai-sdk`), `useLangGraphRuntime`, `useStreamRuntime` (LangChain), `useAdkRuntime` (Google ADK), `useA2ARuntime`, `useAgUiRuntime`, `useEveAgentRuntime`, `useOpenCodeRuntime`, `useLocalRuntime`, `useExternalStoreRuntime`, `useDataStreamRuntime`, and `useAssistantTransportRuntime`, plus wiring guides for Mastra, Cloudflare Agents, Claude Managed Agents, LLM gateways, a ChatGPT subscription, and Electron. Also covers the Expo (`--native`) and React Ink (`--ink`) platform scaffolds and the hosted MCP docs server. Route here for the CLI itself, choosing a runtime, or a platform target; once a runtime exists, use elements to install the styled Thread/composer, primitives for unstyled building blocks, runtime for the chosen runtime's hooks and adapters in depth, react-native or ink for platform specifics, and update for a deep migration.

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