Title
Code name (sidebar + here; exported in .md front matter, never the internal id)
Tags (comma or #inline in text)
Each note has a code name (the note). Set You under Live session so edits stamp last edited by with your session name—visible in the list and editor, included in Export .md as last_edited_by. Internal id stays in JSON / share / peer only. Live / merge: last full sync wins / demo-grade, not CRDT.