Run Script In Background

I have a script that I need to run in the background. I use launchd to run it every 5 minutes. I would prefer if the user wasn’t taken out of what they are doing, or saw a bouncing dock icon.
This is a script I wrote a couple of years back and finally the client wants to install it… I think I had a utility that I used to set this… but it’s gone… and I would rather know what controls this so I could see ion the parameter was set… wherever it lives.
Do you folks have any idea where this gets set…

In the Info.plist file of the app, add an entry for LSBackgroundOnly and set its value to YES.

This is terrific, Thanks.