What’s up Grace! We’re both design geeks; that’s good.
I’ve toyed with Craft Library a little bit. I know lots of UX Power Tools customers have used Craft successfully with this technique. I have had issues with Craft in the past, so I’ve stopped depending on it.
Lately I’ve been playing with Brand.ai and it’s everything Craft Library is, but better. I prefer their Sketch plugin UI, and I love that they have a developer API so that devs can access things like brand colors and fonts that I sync. It’s pretty genius. (No, I don’t work for them ☺️).
Their website has some good testimonials from large companies like Ebay, so I trust that larger enterprise-level teams have made it work.