Thank you for sharing this, it's a beautiful writing experience. And so easy to install, it was straightforward to make it available on a Tilde server for others to try.
(one suggestion for the docs: the included man page can be installed systemwide, with "sudo cp fri.1 /usr/share/man/man1/" on Debian systems)
Edit: having Hemingway/typewriter mode (disable backspace) available as a shell flag would be wonderful :)
