Function: useChat()

useChat<TMode>(options?): UseChatResult<TMode>

Full chat controller hook — messages, steering, and tool confirmations.

Wraps ChatSession with useSyncExternalStore for concurrent-safe React state.

Options like transform, confirmationPolicy, and deriveMode are captured at mount time. Changing them requires a new sessionId to take effect.

Type Parameters

TMode extends string = ChatMode

UseChatOptions<TMode> = ...