Thanks! I built the editor using Tiptap (https://tiptap.dev/) which doesn't support Markdown out of the box. However, since it can detect Markdown shortcuts (#, ##, >, etc.), it should be possible to convert a markdown file into rich text, and then when done writing and editing convert it back into markdown, while limiting formatting options only to ones that are available for both. I think Joplin (https://joplinapp.org/) does something similar.

I'll think about this for sure, especially since I've been thinking of making it possible to save and read local files. If you'd like to try Gorby, send me an email and I'll be happy to give you a free license code :)