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.

• Chatter Feed Files
• Update fields on Content Version