Recently we introduced the jsduck @see tag in MobileFrontend , which isn't part of the vanilla jsduck. Actually we need to add a customTag our self  to use it without warnings from jsduck. The feature request for jsduck  isn't implemented at the moment and there is no roadmap for it (as i can see).
VisualEditor itself (like mentioned by @Krinkle on the feature request) uses a set of custom tags  and there are other projects using this (and other) custom tag(s), too (core, VE and GuidedTours). It would be possible to use cores CustomTags.rb in jsduck, but with it it wouldn't be easy to share custom tags introduced in VE or MF, e.g.. So it would be great to have a central repository (e.g. a git project in gerrit) to manage tags used in wmf projects to simply clone it (maybe integrate it as a submodule) into the project (or a seperate directory) and use it. An update of a tag or new tags could be used without any problems by updating the local copy of the repo.