@dansup Great! Will this be using GTS's vocabulary? https://docs.gotosocial.org/en/stable/federation/interaction_policy/ That would be cool.
I have volunteered for the task of turning their spec into a FEP (with the GTS team's permission) and I hope to get that done within a week or two. Would be amazing to convene on one approach, to increase the likelihood of larger projects also joining in.