@marado@tilde.pt well, I find that’s a problem of leaving that open. Using should vs must. Leaves that to different interpretations.
https://twtxt.readthedocs.io/en/latest/user/twtxtfile.html
A status should consist of up to 140 characters, longer status updates are technically possible but discouraged. twtxt will warn the user if a newly composed status update exceeds this limit, and it will also shorten incoming status updates by default.