text: Title: Force json response for autodraw drawing agent
  Body: Within `/gpt converse` there is an agent that creates a prompt and determines if drawing is needed when a conversation message is sent with gpt-vision, currently, when I set response_format in the request to the model, the upstream API seems to complain saying that that parameter isn't allowed. 
  
  It may be not supported by gpt-4-vision? Otherwise, we need to find a fix so we don't depend on retries to enforce JSON.