Interesting...
A cherry.jpg image/jpeg file is shown as an image by the browser
A logo in svg like https://news.ycombinator.com/y18.svg too
So browsers should show readme.md as text/markdown and clicking on a link inside that file should also redirect to another markdown file, instant wiki
Browsers should implement that asap and we will follow
It depends on one question: does Markdown support <script> tags?
Technically, Markdown supports all HTML tags, including script tags.
Practically, Markdown is more of a vibe than a spec and everyone just uses whatever subset makes sense to them.