Gregory's Server@kissane The concept is to create a link that could be clicked by someone regardless of their server, and their preferred app would be able to open it locally on their own server. e.g. web+ap://portend.place/users/smitten could be shown on any page and would link to my profile on your server.
“Preferred app” here could be a desktop browser, mobile app, or native desktop app. This would replace Mastodon’s copy-paste, or ‘Remote Follow’ from Akkoma/Pleroma. works for post’s URIs too.