{<scope>: {<follower>:{<followed>: boolean}}

to clarify, would follower be the target feed id (instead of the contact property?)
and would followed be the relation type (following, blocking, flagged)?

if so, this would allow for using {reason: string} or other arbitrary truthy data for the boolean value, which could be useful.
it would also allow for relating to multiple contacts in one message, which seems okay to me.
it would also break backwards compatibility so would be ignored by existing sbots. this would be useful if you want that: %ezEUduX... or not useful if you don't want that: %UfwxBAq...

including scope in the object path before the feed id and relation type makes it required. what would we use for scope if want to have continuity with the current scope which is none/all?