Thanks for your question Brandon. I'm not sure if anyone has used Skuid for libraries yet however I did some initial digging and have found that libraries etc. are stored in objects that are accessible to Skuid (via models, like all other objects).
Libraries are stored in the Content Workspace Object, which you can expose in Skuid (at least for public libraries).
The files themselves are stored in the ContentDocument object and related to libraries by the (aptly named) ContentWorkspaceDoc object.
There a quite a few other Content-related objects as well which might be worth looking into.
For general info on files/ chatter files see these topics: