Good morning folks,
I’m new to Elixir and have a project I’d like to build, but I think I might be a little out of my depth.
I want to make an SSH server which, instead of presenting a command prompt, presents a simple game in the terminal.

I’ve found jbenden/esshd and a couple of small examples of Erlang’s own :ssh module. However, all the examples I can find seem to accept input line by line. The user types a command then the user presses enter, then the full line they typed is sent to the server and my code can read it and do something with it.

I’m wondering if this is a gap in my knowledge about how SSH works. With a normal command-line application, I know there are arcane escape sequences I can send to any given terminal emulator that will put it into raw/non-canonical mode; all nicely abstracted away behind ncurses so I don’t have to think about them.
But in this application, there is no terminal, at least not one I’m aware of.
By what mechanism can I signal to an SSH client that as soon as the user presses an arrow key, I want to hear about it?