i dont mean to come off as hostile but i feel this is actually something i had thought most people considered to be the opposite of what the fediverse wants?
i do believe that (as the navy calls them, Standard Operating Procedures, note that the term is much more specific) for admins and users to have access to how to handle it are a positive thing, although i would not confer that they are a book that must always be followed, are a good idea...
this has nothing to do with a "community strategy".
i worry i may come off as being pedantic or attacking the user of the term "community" but i still find this idea entirely unrelated to any sort of community.
a "suggested practice" or "suggested admin guidebook" is a wonderful tool but it is nothing to do with a "community", as i understand it.
you cannot ensure that people obey this "community" strategy, and thus there isn't really any community involved. community implies a coming together of people, "a group linked by a common policy". this policy cannot be enforced, will not be enforced, and is thus a community toolset at the very best. and again, this would not essentially turn out to be a community, as i understand it, as it assumes a group of instances all using the same toolset, and communicating.
this explanation does not even vilify or disagree with any work towards a "community" but i just dont hesitate to point out how fragile the idea of "community" is, and advise to be very careful when using such words or dancing around this idea, as i find it counterproductive more often than not.
EDIT: i realize this might have been a largely negative post, so an addition on how to positively manage a community follows.
first, communication, as is implied in the name, and thus a chat of some sort or another to discuss upcoming changes and the like.
second, a written agreement, or otherwise some sort of proof of agreeing to the rules and regulations such a community must form.
third, a system for reporting anonymously to the community at large of any one admin not obeying the rules and regulations.
that's about all i got, i think. i don't mean to say communities are a bad idea, or a waste of time, i have simply never seen one work out well, and thus am largely pessimistic.