I’m interested to hear how you think this would work. Currently we do allow you to link to other notes. It puts a link in the text. Of course, you can put a backlink in the other note yourself too.
How would a bidirectional link work in Agenda exactly? You would have a link in the text where you make the link, but where would the back link go? You can’t insert it in the text of the other note. Would you expect it to be in the cog menu or behind some button? Ie have a menu list of notes that point to the current note with links, and be able to jump to them by selecting an item in the list?