This seems like black magic, but it really does raise a lot of questions about the telemetry issue. It's one thing to potentially leak information from your own machine, but leaking data from remote servers you ssh into requires a whole 'nother level of assurity around privacy.

That said, it's pretty attractive because it's much harder to make a case to install fish on remote servers.

I assume this is done by running 'ls' in the background and not showing the execution to the user, except as autocomplete suggestions?

if I type 'sudo cp ' will it run 'sudo ls' to offer suggestions?

this...is not good. my terminal should not be executing code on my behalf on remote servers I've SSHed to.