I hope to work on this at the upcoming hackathon, in the Washington DC space. (https://meta.wikimedia.org/wiki/DC_Hackathon_2022)

@Bryandamon: We discussed this at EMWCon 2019. It might not be difficult and it addresses one struggle in wikis using Cargo.

@Aklapper: I can't work on it this Hackathon but someday perhaps. (I had some logistical challenges.) Also I don't know how to program well enough in the mediawiki context. In the longer run I hope to find an extension author who wouldn't mind to merge this content into an existing extension. It is not a lot to add, and some mediawiki managers would benefit.

I can respect that. I don't know what should happen.

Went great! Very clear. Capt_Swing presented very helpfully and walked us through the basics. Everyone could try queries on their own computer as he spoke so it was easy to remember, build, and focus on subject of our own interest.
Quarry's ingenious -- We can see other people's queries and learn from them how to specify a query without bothering them. Quite nice feature also for the teaching session so we don't all have to get the syntax right immediately by ourselves. Thank you yuvipanda!