CSV Importer
I would like to look at creating a CSV importer for the csv export from libraries in libib.com. Is there any information on creating such an importer? Would starting from one of the other importers be the suggested way to start?
https://www.zotero.org/support/dev/translators/coding#import_translators
You'll mainly be using standard javascript; there aren't many specialized zotero functions beyond detectImport and doImport that'll help you in this context.
I would _look_ at some existing translators (Bookmarks.js and Ovid Tagged, maybe) to get a sense of how they work, but I wouldn't actually start with one of them: what you'll want to do is going to be so significantly different that it likely doesn't make sense to carry over any of the code designed for completely different import formats. Zotero currently has no import translator for anything tabular.