fish_prompt.fish

$ cat .config/fish/functions/fish_prompt.fish 

function fish_prompt --description 'Write out the prompt'
	if test -z $WINDOW
   printf '%s%s@%s%s%s%s%s> ' (set_color yellow) (whoami) (set_color purple) (hostname|cut -d . -f 1) (set_color $fish_color_cwd) (prompt_pwd) (set_color normal)
 else
   printf '%s%s@%s%s%s(%s)%s%s%s> ' (set_color yellow) (whoami) (set_color purple) (hostname|cut -d . -f 1) (set_color white) (echo $WINDOW) (set_color $fish_color_cwd) (prompt_pwd) (set_color normal)
 end

# update the cwd to facilitate restore
# https://github.com/fish-shell/fish-shell/issues/87
printf '\033]7;%s\07' (echo file://(hostname)$PWD |sed -e 's/ /%20/g')

end

the -s flag to hostname was preventing proper proxy icons from working with local shells, so I removed it.