The current up arrow implementation is nice, but why not both?
Maybe a bit nit picky, but as an extra UX feature, if I was implementing this, I would probably also
add an extra safe lock where if the “last whisper” has changed within 3 seconds of me using /r,
it stops me from sending it, just incase someone else whispers me as I’m about to send my whisper.
EDIT: Quick extra UX tip, strip @ sign in username, as people may use that for autocompleting names.
/w @ehsankia helloworld