An idea for helping humans and machines understand when a twtxt-feed are using some of the yarn.social extensions by applying a mix of a hash-bang and a DTD to the first line of the txt-file:
#! DOCTYPE = twtxt (https://twtxt.readthedocs.io) with extension for multi-line and conversation treading from Yarn.social (https://dev.twtxt.net)
It would be nice if the link to the extension could be to dev.yarn.social
, docs.yarn.social
or similar instead of dev.twtxt.net
to make it less confusing.