I wrote an article about some of the protocols underneath StatusNet, and I plan to write more in the near future.

https://www.fknsrs.biz/blog/don-statusnet-node-part-one-read-protocols.html

@deoxxa I thought LRDD and host-meta were deprecated and only are implemented for backwards comparability with OStatus nodes that don't use webfinger
@serval they kidn of are deprecated, at least in the context of OStatus. It's still useful to have them as a fallback for when the WebFinger negotiation doesn't work first try though, I think. Maybe they're unnecessary though - I'm sure we'll find out more as time goes on :)