nostr:npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z

How/when can I share a post in nostr/Amethyst, to a user who also uses nostr/Amethyst, such that I can send them a link out of band, and it will open in nostr/Amethyst?