conn.AnswerSeat takes the seat's definition from its caller (the seat list the process follows) and,
before a handler runs, refuses an unproven caller, and every caller while the definition is unread,
names no such verb or opens it to none; a proven caller is among them, since the grants part composes
the call subject only for the effective callers. Every caller of AnswerSeat passes the definition.
Builds: design 47 G §610; lead answers A-165, A-179, A-186
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h