(#fzmmn2q) @zvava@twtxt.net Good question. This is the spec, I think:
https://twtxt.dev/exts/metadata.html#nick
It doesn’t say much. 🤔
In the wild, I’ve only seen “traditional” nick names, i.e. ASCII 0x21 thru 0x7E.
My client removes anything but r'[a-zA-Z0-9]'
from nick names.
#d4tc7ya