Struggling to get windows focused correctly

[thefiredman]

I am working on the following script:

focus window after active space changes

yabai -m signal --add event=space_changed action="[ $(yabai -m query --windows --space | jq length) -eq 1 ] && yabai -m window --focus first"

I tried writing my own script as #719 (comment) didn't work

This focuses the window if there is only one window present I tested this in /bin/sh and it worked.

Is there something I'm missing help would be appreciated.
I also have this which focuses the window if there is only one. These scripts aren't great but I'm kinda struggling.

yabai -m signal --add event=window_destroyed action="yabai -m query --windows --window &> /dev/null || yabai -m window --focus mouse"
yabai -m signal --add event=application_terminated action="yabai -m query --windows --window &> /dev/null || yabai -m window --focus mouse"