I've been working on knowledge base + spaced repetition project, and I know how convenient markdown files are.

1. You can view them anywhere (Github renders them nicely) 2. You can edit them in your favorite editor 3. Formatting doesn't decrease the readability 4. Extensible (syntax highlighting, mermaid, mathjax, etc.) 5. Cross-linking which is a core for any knowledge system is free 6. You can use Git for versioning and backup, etc, etc.

https://github.com/odosui/mt

This looks really interesting! I am studying "knowledge-heavy" subjects with lots of facts I need to learn, and have been looking for software where I can write flashcards directly within my notes, and both review them when reading my notes, and globally across notes. I like to have my notes locally, so I didnt find any good solutions. But there are some parsers for anki that can process markdown documents and extract items within them