Problem: QRpedia.org has existed for many years, but it doesn't (seem to) suport anything other than "[xx].wikipedia.org" domain. So we can't make QR codes for Commons, Wiktionary, Wikisource, Wikibooks, Species, Incubator, etc. CMIIW but there's no documentation and unclear who's the maintainer
Proposed solution: Create an official QR generator In-Wiki. Just like how w.wiki was created for URL shortener, something like qr.wiki could be made for a permanent QR identifier
Who would benefit: Everyone that's trying to generate QR codes for projects other than wikipedia.org domain.
More comments: Our GLAM partner have to resort to third party websites to generate QR code for Commons. It works normally the first few weeks(?), but after that it display advertisement first before user being redirected to the target URL. By that time it's already late to replace all the plaques, printouts, etc. It was a saddening day. Their trust to us was lowered because they think the advertisement came from us/Wikipedia. (And please don't suggest a "free" 3rd party QR generator, I'm not looking for any)