Hi everyone, I've come up with a rough OOjs-UI-based rewrite of the long-standing Reference Tooltips https://www.mediawiki.org/wiki/Reference_Tooltips gadget. I'd like to see it enabled on Wikimedia sites as a beta feature, to ultimately replace the gadget, but I'm not sure it is worth an extension on its own. It could share some code with the Popups extension https://www.mediawiki.org/wiki/Extension:Popups but, unlike the latter, the former does not depend on neither TextExtracts nor PageImages. The Cite extension https://www.mediawiki.org/wiki/Extension:Cite is required for references to work, so the tooltips could just be an additional feature. However, I don't feel comfortable with embedding such an experiment into a cornerstone of ours like Cite. VectorBeta https://www.mediawiki.org/wiki/Extension:VectorBeta includes many features of this kind, but reference tooltips are really not Vector-specific. Which do you think is the most suitable repository?