An address is the public path a Human reaches a thing at — a product's URL — and once it has been shared, linked, or indexed it becomes a durable promise rather than a disposable string. This RFC defines Durable Addressability so that changing the address of a published thing preserves the old path by redirect, rather than silently breaking every inbound link, bookmark, and citation that trusted it. It applies No Retroactive Harm to the namespace and supports Exit & Portability, treating reachability as something owed to the people on the other end of a link, not a convenience the platform may revoke.
