Shared State Setup - Copilotkit

<Steps> <Step> ### Install the LangGraph Python SDK

<InstallPythonSDK />

</Step> <Step> ### Wire CopilotKit middleware into your graph

Shared state flows between your UI and your agent through `agent.setState`
on the frontend and `state.get(...)` in your graph nodes. Attach
`CopilotKitMiddleware` to your `create_agent` call so CopilotKit-specific
state is picked up alongside your own.

<DemoCode file="src/agents/frontend_tools.py" region="middleware" />

</Step> </Steps>