Add stop helper to useAssistant

[jferrettiboke]

Feature Description

Could we add support for canceling a call that is in progress in the AI SDK UI? I know this feature is available in the AI SDK Core and AI SDK RSC, but can we incorporate it into the AI SDK UI as well?

Use Case

Many users see no value in waiting for the full response from the server if they notice that the response does not align with their desires or if they realize the response is incorrect. It would be beneficial to have the ability to cancel a call that is in progress while using the AI SDK UI.

Additional context

No response

[lgrammel]

The AI SDK UI functions ( useChat, useCompletion ) return a stop helper (see https://sdk.vercel.ai/docs/reference/ai-sdk-ui/use-chat#stop ). Would this work for your use case?

[jferrettiboke]

@lgrammel But this doesn't exist in useAssistant. Right? I need it there.

[lgrammel]

PR: #1524

Unfortunately it seems that OpenAI does not correctly abort the assistant from running when an abort signal is sent, and prevents further chat responses until it has finished completely.

[jferrettiboke]

@lgrammel Thanks!