I was hoping to see a more modern alternative to the VTE terminal protocol and its derivatives. Does anybody have any good suggestions and possible implementations?
https://sw.kovidgoyal.net/kitty/protocol-extensions/
The intention is to document them well enough that other terminal emulators can implement them (which some have).
Among those is a graphics protocol, which is actually (optionally) used by chafa. Another is a keyboard protocol extension: which has been implemented by a number of editors and other terminals: notably neovim, kakoune, helix, wezterm, and foot.