[vim_racer]

Another user mentioned this too. I'll be adding settings to let users turn relative lines off.

[ccvannorman]

is the vimrc exposed?

For maximum vimness you could let players mod an empty vinrc from start

[vim_racer]

I think the library just has key bindings, so it wouldn't even have a vimrc.

The library seems great at the time, but I might need to look into alternatives in the future.

[JoshTriplett]

A full vimrc would allow blatant cheating, such as preprogramming commands to do exactly the movements you need for a given case.

It sounds like allowing toggles for a few key options would probably satisfy most people while keeping the spirit of the exercise.