Morning, Hodlbod.  I posted a PR this morning and someone suggested I “merge” ideas with your idea.  Was wondering if you wouldnt mind taking a look at my PR making a comment about the sophistication of your unions, intersections, and diffs relative to my submission.  Should these ideas merge into one “feed” kind?  I do see some overlap as far as the end result. 

 https://github.com/nostr-protocol/nips/pull/1268

forgot to link PR