Last modified: 2012-12-30 22:47:36 UTC
The stashimageinfo doesn't work the same way other prop query modules do (it doesn't accept titles and doesn't work with generators). Because of this, I think it shouldn't be a querymodule, but a regular module. I think th reason it's currently a querymodule is just because the ApiQueryStashImageInfo class inherits from the ApiQueryImageInfo class.
I tried to convince the original developers to not make it a query module, but they had some compelling reason to still do it. There is probably a thread on a mailing list about this.