How to add parts to a rig?

I have a default rig, and I want to add clothes to it. How could I properly attach it so that it doesn’t break the rig/fall off?

what you can do is make the clothing accessories and use attchments for them then you can rig it with the accessories moving with it

Do I have to make the clothes apart of the rig or just attach them?

Also what attachments should I use?

just default attachment’s should work.
and yes just attach them

Oh so like the wield surface? or glue or

Yes, a wield or something along those lines could work.