I noticed Skyrim by default when you compile a BSA includes script Source files PSC and PEX files

Do you have to have the source files PSC in the BSA for the mod to work correctly?



Thanks

No, you don't need to include the source files. It is considered a good practice to include the source files or otherwise make them available, so that others can learn from your work, or see how to make their work compatible with yours. But the mod will work fine without them.

The PSC files aren't required, only the compiled PEX files.

However as they're only a few bytes/kilobytes, it's always nice to include them so other modders can have a look at how you did certain things. There's no real advantage to not including them.