How to Allow Some Descendants of Package be Modifiable?

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#1

I have a package with some IntValues, NumberValues, and other miscellaneous items like parts and whatnot. However, I would like for the properties of these values to be different for every package. How would I include these in the package but allow them to be modifiable?

#2

Maybe try using Attributes instead?

#3

I need to do the same with ObjectValues as well, but Attributes don’t support that.