No native way to do it in C4D. Manually have to merge them then convert that one file to PYP.
So have to manage separate project files. One for source ones and one for merging several PY files.

without further questions or postings, we will consider this topic as solved by Monday 05/06/2023 and flag it accordingly.

Thank you for your understanding,
Maxime.

apologies for the late response.

thanks for the confirmation.
I guess I'll just do what @baca recommends which is to manually merge everything to one .pyp file. Probably some a bit debugging happening for imported modules but I guess that's for another thread.

Thanks again!

Cheers,
Maxime.

I keep source files separately.

And I wrote compilation script and config file, which just loads separate plugin files, scan for local dependencies to load them as well.
So it combines everything into single .pyp file.
For distribution it encrypts final compilation into .pypv file.

Not much effort for this script gives development flexibility.

I'm guessing you are referring to just a simple merge of files with PYP convention.
I'm thinking more of like a C++ project. Where it has a lot of files and can just be compressed/compiled to just handful of files for distributions.

I have a lot of utility py files and I would like to keep separate in my development environment since I used it in several plugins.

But there're not many reasons to have single file for multiple plugins over multiple files with single plugin each.
More likely issues with one of the plugin might affect other logic if they are in a single file.