Yes, it's in NIP-24 for Kind 0.
https://github.com/nostr-protocol/nips/blob/master/24.md#kind-0
nostr:npub1m4ny6hjqzepn4rxknuq94c2gpqzr29ufkkw7ttcxyak7v43n6vvsajc2jl did a NIP for profiles AFAIR. bot=1 or something like that.
but there should also be something for individual notes.
Yes, it's in NIP-24 for Kind 0.
https://github.com/nostr-protocol/nips/blob/master/24.md#kind-0
No replies yet.