Yeah, I am not very happy with this xypic.js library. It hasn't been worked on for years and has some questionable practices in terms of module management - e.g. deploying on a different URL path requires changing last line in xypic.js.

There is probably a new iteration somewhere else that solves the same problem. I might take a look in couple of weeks, but I know for sure this version can only do about 90% of what your engine can render. I tried to keep everything very simple, mostly as a wireframe, not marrying to the libraries underneath. But hey, it somewhat works.