Building off @pukkamustard’s FEP and the initial proposed process over at https://git.activitypub.dev, there’s a list of FEPs that are missing that could document the current Fediverse better:
- webfinger: @tinyrabbit + ?
- http signatures: ?
- federating Block activities: ?
- custom emojis: ?
- e2e encryption: ?
- nodeinfo2: ?
- federating.md: @darius
- chat: @lain
- …?
(I am not here to say which of these I do/don’t endorse, just figured all should be considered for FEP)
I’ve “volunteered” a few folks I think that had expressed something before. If I’m wrong, let me know. 
Anyone else want to sign up / pair up for writing these? Also, what other topics are we missing?