Generalize `useAssistant` to accept and send an `assistantId` to `api`

[mfts]

Feature Description

Add assistantId to useAssistant

Use Case

I'm creating assistants on-demand and want to pass the assistantId into useAssistant, so it's sent to the the edge server along with threadId and message.

Furthermore, I want to add the assistantId to AssistantResponse because assistantId is created dynamically. Current implementation relies on assistantId coming from .env

Additional context

No response

[tgonzales]

Hi @mfts Just like useChat you can use body to send customized data

[mfts]

@tgonzales I don't see how useAssistant takes a body argument? What am I missing?

ai/packages/core/react/use-assistant.ts

Lines 10 to 13 in 8b4f7d1

	export function experimental_useAssistant({
	api,
	threadId: threadIdParam,
	}: {

[tgonzales]

You're right @mfts , I thought the implementation was closer to useChat, I believe the best way would be this, adding body and header to useAssistant would give more flexibility. I'll try to make a PR for this feature

[lgrammel]

@tgonzales I have some capacity to take this on. Let me now if you want to add it, otherwise I could take a look at it today or tomorrow.

[lgrammel]

Also, as a note, I would prefer not adding the assistantId to useAssistant, since this is an edge case and in most cases the assistant ID should be hidden on the server side. Instead I would implement the option to send arbitrary data with the useAssistant hook, so you can handle this special case (I can provide an example).

[holdenmatt]

Great to see a data prop is being added (thanks!). I'm building a prototype that uses multiple assistants, so having some way to specify an assistantId will be very useful!