https://github.com/nostr-protocol/nips/blob/master/65.md

mostly this... it enhances the old relay list by specifying which ones you read from and which ones you write to

the outbox model means pulling this event type and using those for the relevant case, so, posting to where you read, and reading from where you post 

 Thanks. Seems like a good model, hopefully more clients use it like nostrudel  

 it's better than the "gossip model" which pablo, fiatjaf and other rock stars are in love with... they are just youngins and don't have serious engineering troubleshooting exp