| title | State Rendering |
|---|---|
| icon | lucide/Bot |
| description | Render your agent's state with custom UI components in real-time. |
| snippet_cell | shared-state-streaming |
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.
**Free course:** See this pattern built end-to-end in [Build Interactive Agents with Generative UI](https://www.deeplearning.ai/short-courses/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).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
On the frontend, subscribe to the agent's state. Each time the backend forwards a fresh value, your component re-renders with the latest partial output.
On the backend, a state-streaming middleware forwards a specific tool argument straight into a state key as it's being generated, so the UI can watch the answer assemble token-by-token rather than appearing in one burst between node transitions.
<IntegrationGrid path="generative-ui/state-rendering" exclude={["agno", "agent-spec"]} />