What was agreed to in the unsealed Change of Plea is clear. I am guilty of the four counts because of ...
If you're asking what information he gave in exchange for what appears to be a drastically reduced sentence, that's a different question. Yes, that story is sealed, probably being used by the prosecutors.
Prosecutor: Were this -- were this matter to go to trial, the government would be prepared to prove the following: Defendant Matthew Brown is pleading guilty to ...