Thank you! Let me note a few places where I believe the bibtex could be improved. I have never written any Clojure so this is less useful than I think you’d like, but let’s at least start with “here are three things that could be done better” and then see the next steps.
Months
It appears that add-month will always return a string surrounded with quotes (e.g., "jan"). BibTeX instead has (built-in) abbreviations for months, and understands those abbreviations, and those abbreviations do NOT have quotes around them. (Then a local style could understand this abbreviation and produce a bibliography with, say, “January” or “Jan.” or “1/” or in a foreign language.) So instead of emitting
month = "jan", or month = {Jan},,
->bibtex needs to emit
month = jan,
It appears that the months are capitalized somewhere in the process and I haven’t figured out how yet (because bibtex-month has uncapitalized strings). But correct BibTeX months are lower-case and not in quotes.
(“It’s best to use the three-letter abbreviations for the month, rather than spelling out the month yourself. This lets the bibliography style be consistent.”—BibTeXing, Oren Patashnik [BibTeX’s author], February 8, 1988. https://bibtexml.sourceforge.net/btxdoc.pdf)
Extra credit: issued/date-parts might have multiple dates. If there are two dates, does this encode things like “March–April”? If so, the correct BibTeX is month = aug # "\slash " # sep.
@inproceedings
I’m looking at an article (doi:10.1145/3448016.3452841) that’s labeled as type: proceedings-article that should be output as an @inproceedings with the container-title mapping to the field booktitle. Instead the BibTeX output is an @article with a journal that contains container-title.
Extra credit: It’d be nice for @inproceedings to also output series = with the contents of event/acronym, if present.
Title + subtitle → title only
Same DOI as above. It has a title and a subtitle field. I believe add-titles only takes into account title. If subtitle is also present, then title and subtitle should be joined with a colon and output as the BibTeX field title = ....