@zvava@twtxt.net the second format (the one you think should be changed to), is it backwards compatible to what’s currently in place? I believe the first one would be.

@bender@twtxt.net The first format use the subject extension while the other is a new format that is inspired by mentions format, the first one should be compatible but I’m not sure, if it’s used verbatim by the client it would work, but if we consider the new proposal for it to have an optional part it wont work on clients without changes.