Yes that was my point exactly.
There will be a plea agreement.
It will have been negotiated by both parties.
It will set forth terms and conditions mutually agreeable to the parties.
It could contain terms to govern what the parties are allowed or not allowed to say.
I'm not suggesting particular content, which are you say, can only be found in the record and typically would be sealed by agreement of the parties.
ThankQ lawfag.