Have a look here: https://gitlab.freedesktop.org/terminal-wg/specifications/-/issues/1 https://gitlab.freedesktop.org/terminal-wg/specifications/-/... Basicall

Have a look here: https://gitlab.freedesktop.org/terminal-wg/specifications/-/issues/1 https://gitlab.freedesktop.org/terminal-wg/specifications/-/... Basically Kovid Goyal, the author of kitty, volunteered to write a spec, based on the work he did for kitty, but got fed up with what he perceived as pointless bikeshedding. The authors of other terminals represented in the terminal-wg (e.g. iterm2, mintty and vte -- which powers terminator, gnome-terminal and others) kept going for a bit, but there is no shared spec yet and I haven't checked if anyone else other than Goyal has implemented something at this point (I thought vte had, but I didn't immediately find it when I looked). It also looks like it might take some time till some de-facto standard emerges.