We LOVE the idea of libraries. The ability to create one, add related rules to it and then promote them as a group is a big plus for Launch.
I envision creating libraries named after the JIRA story that requests the work. Again, a huge step in being able to track requirements through implementation.
It would be great if there was a comment field available at the library level similar to what we have for rules. That way, more detailed information about what is in the library can be added. Something as simple as a link to the JIRA story or more complex like a full explanation of what work is being done there. Think of it like how you add a comment to a PR in Git.