I've worked the CodeSharing feature into the MoEML XAR today, deciding on having the build process for the XAR just check it out from GitHub and put the bits in the right place, with the controller.xql handling the rest. So far so good; then I set up controller-config.xml so that the root path goes to the MoEML webapp, and the other apps we want are available from there. However, the "root" right now is /exist, not /, and I can't find a way to change that. After trying everything I could think of, I've written to the eXist list.