Firstly, thanks for creating this project!

It would be great to extend the completion support for references and citations to support the following things:

• completion support for equation references \eqref,
• support for parsing citations from a bibliography added with \bibliography{path/to/bib} ,
• setting the details/documentation property of citation completions to include the author(s) and the title. It would be great if whenever the user types \cite{ the completion window contains not just the cite key but the author and title (I am not sure but I thought this could be done by setting the either the detaill property or the documentation property of the completion),
• hover support for references and citations: when the user hovers over a reference show the definition, when a the user hovers over a citation show author and title (and possibly other details).

Personally I would find these features particularly useful, all of my citation keys are some unique identifier that are not very instructive as to what is being cited (most of the citation keys I use are the same as used on mathsci.net).