Redirects are for pretty paths, not for moves. A move changes a node's parent; children, comments and grants follow because they reference the id. A redirect node at the old place is optional and exists only so that old pretty URLs and old links written without a node id keep working. The peer follows at most five hops and refuses cycles. A redirect concurrent with a state target loses, like a tombstone. The space root cannot redirect; the alias attribute of the space kind does that job for whole accounts.

A Ref with empty heads and a redirect target of {space?, path?, republish?}. Because today's identity is the path, a move is itself a redirect plus a new Ref, and every descendant needs its own. In Stem a redirect refers to a node id, so it survives the target moving again.