Human In The Loop Setup - Copilotkit

<Steps> <Step> ### Install the ADK + AG-UI bridge

```bash
pip install ag-ui-adk
```

</Step> <Step> ### Add `AGUIToolset()` to your agent

Tool-based HITL (`useHumanInTheLoop`) registers the picker UI on the
frontend; CopilotKit forwards the tool definition to your model through
`AGUIToolset()`. ADK doesn't have a native `interrupt(...)` primitive
like LangGraph — for graph-paused pauses, use the frontend
Promise-based `useFrontendTool` pattern instead.

<DemoCode file="src/agents/hitl_in_chat_agent.py" region="setup" />

</Step> </Steps>