A few weeks ago I highlighted an article on turning VSCode into an awesome Markdown editor, Marvelous Markdown with VSCode.
Today's project is as comprehensive, but Lucian Wischik's extension is a type that I've not seen done very often. Seems like he loves doing those kind, doesn't he, such as Lessons Learned Creating A Visual Studio Text Adornment
Adds support for browsing the headings of a .md file in Solution Explorer
This extension makes it so Markdown files show all their headings and subheadings right inside Solution Explorer.
Note: this is still a preliminary proof-of-concept thing. It doesn't dynamically change the list when you add or remove headings. To achieve that you have to press the Refresh button.
... [Download it]
Make sure you check out the repo too, https://github.com/ljw1004/blog/tree/master/VSIX/MarkdownProvider