ChunkWM suggests cding into directory that does not exist ~/Library/LaunchAgents
From man launchd:

FILES
 ~/Library/LaunchAgents         Per-user agents provided by the user.
 /Library/LaunchAgents          Per-user agents provided by the adminis-
                                trator.
 /Library/LaunchDaemons         System-wide daemons provided by the admin-
                                istrator.
 /System/Library/LaunchAgents   Per-user agents provided by Mac OS X.
 /System/Library/LaunchDaemons  System-wide daemons provided by Mac OS X.


So user-specific agents should be in ~/Library/LaunchAgents. If the directory doesn't exist it can be created with mkdir ~/Library/LaunchAgents.