Marek S. ล.
@marek@m5l.eu
See it working at https://marsh-sim.github.io/bibliography/
Because everything is written in regular files, the editor can autocomplete citation keys without any special tooling - they are just sections in another file. This kind of interoperability is why simple tools like text files and #ssg are so great.
I'm not a fan of hosting it on GitHub anymore, but there are already links in various places that I can't update, so this is the reasonable thing to do.