Move a Session to Another Region Without a Gap

When a region degrades, sessions must move to a healthy one, but a move that copies state without fencing can leave two regions both believing they own the same session. This skill covers cross region failover for agent sessions: carry the session state to the target first, confirm the target can serve the turn, give the new owner a fence token the old one cannot hold, reject any delayed message from the old region, drain the old region so in flight turns finish, and alert on regional health so a move starts before the failure is total.

Commands