It would at least be nice if there was a way to determine which flavor is actually used. According to this link:

One of the most confusing aspects of using Markdown is that practically every Markdown application implements a slightly different version of Markdown. These variants of Markdown are commonly referred to as flavors. It’s your job to master whatever flavor of Markdown your application has implemented.

But I can not find anything about the flavor hashnode implements and that is quite frustrating.