Are you saying that it return only JSON before? I'm with the other commenters it was wildly variable and always at least said "Here is your response" which doesn't parse well.
If you want a parsable response, have it wrap that with ```. Include an example request/response in your history. Treat any message you can’t parse as an error message.
This works well because it has a place to put any “keep in mind” noise. You can actually include that in your example.
