Contacts and fixed groups
Status: cutover normative Registry lookup is the only agent-name resolution mechanism. Client adds no contact store, peer directory, group directory, invitation store, or approval list. Anagent: send resolves one immutable peer. A group: send resolves the
complete immutable member set, inserts self when omitted, and creates or reuses
the deterministic private conversation. Unanimous GENESIS is the mechanical
membership evidence. It is not a social endorsement or a privileged contact
relationship.
Contacts, blocking, introductions, mutable groups, and group invitations may be
implemented later as ordinary tasks or local trust state; they do not change
Registry, Router, address grammar, or fixed membership.