Module mode 

Atomic connection state and controller lifecycle coordination for socket transports.

Transition contract

ConnectionMode is shared across transport tasks. Reconnect transitions use atomic compare-and-exchange operations so late reconnect work cannot overwrite a concurrent Disconnect or Closed state. Sink-backed transitions pair each successful mode change with its semantic availability edge.

Session and controller fencing

ReadSessionFence marks a reader as retired so its dispatch checks drop old-transport messages after observing invalidation. ControllerLifecycle prevents retained reconnect handles from accepting work after shutdown and defers aborting the controller until each in-flight request reaches its handoff boundary.

Enums

ConnectionMode

The lifecycle state of a socket client.

ReconnectRequestOutcome

Outcome of a controller-owned reconnect request.