The export format reference documents data.edn and says an archive can contain media files, but I could not find how a card's markdown should reference an attachment shipping inside the same archive.
I worked it out empirically -  - and it imports correctly, so I am already shipping archives in that shape. Two questions: is that the canonical syntax, and is there a reason it is not in the reference?
Context: I build NextLang, an AI flashcard generator that exports native .mochi packages with generated audio on the cards. Happy to send a sample archive if it is useful.