Using backpack for libraries, without a index.js file?

Hey, thank you for a great project!

I wanted ask if it's possible to use backpack when developing a library, i.e. just use it to compile the code and not try to run it and build all files as single files. If it's not possible, would it be possible to add that in the future or is that outside of backpack's scope?

Thanks

Start by reviewing Backpack's current handling of index.js and its single-file build behavior. Determine whether library development can compile code without running it or bundling all files, and document the intended scope and completion criteria for supporting that workflow.

Written by the indexing model from the issue text.