mesh-sdk's group B member renames the grant to Grant, drops the
controller principal, the signer and the lease fields from the user
list key, and the keeper's and config's take-over verbs. The grants
part, the assigner and the view use the new names; the judge's copies of
the health and config seats follow; the tests' fixtures lose the
controller's user, and the refused principal is one removing what the
closed set does not name, the controller's mirror being gone.
Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL