provide-module expand %—
    define-command expand-impl %{
        evaluate-commands -itersel %sh{
            sel="$kak_selection_desc"
            left=${sel%%,*}
            right=${sel##*,}
            left_d=${left#*.}
            right_d=${right#*.}
            if [ "$left_d" -gt "$right_d" ]; then
                # sel facing back
                echo 'execute-keys H<a-;>L<a-;>'
            elif [ "$left_d" -lt "$right_d" ]; then
                # sel facing forward
                echo 'execute-keys L<a-;>H<a-;>'
            else
                echo 'nop' #single cursor do nothing
            fi
        }
    }
    define-command shrink %{
        execute-keys '<a-:>H<a-;>L'
    }
—