How to make assistant start the conversation?

AI SDK Audit Logging: Enhancing Data Persistence and Tracking”

There are a large number of LLM observability tools out there that capture this for you and present it in a nice UI: https://ai-sdk.dev/providers/observability

How to make assistant start the conversation?

I want the assistant to start the conversation instead of the user. How can this be done? The first assistant message should come from the API, not be hardcoded.