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Built-in Agent (TanStack AI)Build Generative UIState Rendering

State Rendering

Render your agent's state with custom UI components in real-time.

What is this?#

State rendering lets you build UI that reflects your agent's state in real-time. As your agent progresses through nodes and emits state updates, your frontend renders those changes, showing progress, drafts, or intermediate results.

Info

Free course: See this pattern built end-to-end in Build Interactive Agents with Generative UI — a free DeepLearning.AI short course taught by CopilotKit's CEO covering the full Generative UI spectrum (Controlled, Declarative, and Open-Ended).

When should I use this?#

Use state rendering when you want to:

  • Show real-time progress (e.g. "Researching... 2/5 complete")
  • Display drafts that update as the agent works
  • Build dashboards that reflect agent state
  • Render structured output outside of the chat