In case people use
markdown to write academic documents in atom, I just released a fork of
autocomplete-bibtex working with citeproc files (in JSON and YAML). Pandoc deals with them natively, and many reference managers (Zotero, Mendeley, …) can export them.
It adds a few nice features when compared to the original version. You can have a look here:
Please look at the version number (0.0.1), it means that nothing is guaranteed to work, and there are some missing features still.