citar-org-roam VS org-glossary

The `citar-org-roam` declaration looks wrong. `citar-org-roam-mode` shouldn't be in the custom block. Try this (based on the `citar-org-roam` documentation at https://github.com/emacs-citar/citar-org-roam):

I use Citar (along with the Vertico+Marginalia+Orderless stack) to insert/manage inserting citations and citar-org-roam to take longer-form notes on papers with org-roam.

Could you submit an issue at the citar-org-roam tracker, and we'll figure it out?

As far as I can tell, citar--format-entry-no-widths is from a much older version of citar, and is no longer provided by it. You may want to look at the commit history for a definition of that function though probably it will also make use of functions that are no longer part of citar. Perhaps you can take a look at citar-org-roam to see if it does what you need out of the box.

The note API in 1.0 in turn enables a small integration extension: citar-org-roam. This is partly a demo and test of the new API, but should also be useful for users, and developers that might want to build on it. This still needs a bit of work before I submit it to MELPA; PRs welcome.

I've never used it, but I think org-glossary might do more or less what you want.

There's been other, more general, work around similar issues (see org-glossary), that may or may not end up in org, and which may or may not be useful for enhanced cross-references as well.

Along those lines, I've experimented a bit with what a small package to handle cross-references might look like in https://github.com/bdarcus/oxr, and though I guess he hasn't yet formally announced it, org-glossary is a pretty awesome (and much more comprehensive) approach to glossaries, indexes, etc.