BibTeX capitalisation and CSL nocase

When working with BibTeX input, titles fields are sometimes entirely wrapped in an extra pair of brackets, e.g.

title = {{foo}}

Should this result in the whole title being wrapped in <span class="nocase">...</span>, as per https://www.zotero.org/support/kb/rich_text_bibliography?

Moreover, should BibTeX output automatically have an extra {...} wrapping title fields, which is what happens now?

@rmzelle: Thoughts?

[retorquere]

Some of the madness of brace protection and caps meddling is documented here. It’s not an easy subject with a few subtle edge cases.

[retorquere]

If you’re importing {{…}}, that should in principle translate to a nocase wrap. I don’t do this in BBT though.

BibTeX output should absolutely not automatically be wrapped in an extra pair of braces. I see this recommendation occasionally but it’s simply wrong. There are bibtex styles that demand legitimately that they can do their own case folding, and the second pair of braces prevents this. There is an unfortunate difference in baseline assumptions about how titles should be written in Zotero (sentence case) and bibtex (Title Case) that cannot just be ignored.