@stigatle This is more than trivial to implement. Before deciding how to render a link, Yaics might have to send a probe to the destination to find out if it's a GNUsocial instance. If yes, then fetch the contents and display in Yaics. If no, then send the link to the browser. It might be possible to build a cache of hosts that discovered to be GNUsocial, so the probe doesn't have to be sent every time.