First, this is AWESOME!
Second, what is required for someone to have this for a non-Wikipedia wiki? While it would be ideal if this could be packaged as an installable extension, maybe you could share the instructions on what steps to take to make it happen on another wiki server.
Thank you for the kind words, I'm really glad you like this, and very happy to see the positive reactions overall.
As a point of clarification, the Community-Tech team built Who-Wrote-That as an interactive interface on top of the history-analysis done by WikiWho, which is a service that was built and operated by the leibniz-institut für sozialwissenschaften (GESIS). They provide the article history and analysis through an API that "Who Wrote That?" then uses to provide an easy-to-access information.
We're looking into potential expansions of the Who Wrote That? product with an analysis of whether we can expand to more wiki languages and/or potentially to a gadget for wider usage; that effort is tracked at T242918: Spike: Investigate WWT Expansion [4 hours]
@Darenwelsh, the API and the service requires a read into the article history by the institute, so, unfortunately, I don't think it's possible to use it on a private wiki.
The algorithm is open-source, so you could in theory use it on any stream of wikitext (or any kind of text, for that matter). I'm not sure what all it involves to set it up, though.
I don't think it's possible to use it on a private wiki.
Declining for the time being per previous comment