Head’s up: in time (not sure how soon) I will remove the libraries functionality as it exists today (as it relies on federation, which I’ll also remove (Who's using federation? - #10 by zef)).
With your permission @janssen-io I’d then move to basically including what you built here, but baked into SB core as the new “blessed” way to distribute libraries, because I think it’s better than the old way (which was pretty hard to use, unless you deployed a public read-only SB instance).