Earlier quoted context omitted.
A pull request would edit a page, I think.
But that doesn't make it a wiki.
Though... you might as well just use GitHub's Wiki...
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Any team member can collaborate and edit articles live on the site and we are considering adding wiki type functionality if people are interested.
You can learn more at http://userdeck.com/guides.
TLDR; Not actually a wiki. This is a nice front end js component that live autocompiles markdown into HTML. IMHO to be a wiki it would need to manage user editing and version control.
And how is the crawling of search bots handled? Does Google render this into HTML and interpret the hyperlinks and try to crawl deeper pages as well?