Provide complete steps responses in useChat onFinish

[leonho]

Feature Description

In the current useChat onFinish, for multi-step calls, only the final message is returned instead of including the tool responses and chat messages.

With server-side streamText now returning all steps, it could be beneficial to implement this in useChat as well.

Use Case

No response

Additional context

No response

[jonkurtis]

same issue here. when there is a multi-step server side tool call, onFinish only returns the final message which typically would not have the toolInvocation in it.

[nicoalbanese]

Hey @leonho - you can access steps in the onFinish of useChat if you define the maxSteps within your useChat options rather than on the server. Would that work for you?