Operator Command and Authoritative State Roundtrip

Operator Command and Authoritative State Roundtrip A sequence diagram generated by Archify. select permitted action register expected reply typed WebSocket command validate, then send S99F97W EUI command execute equipment operation result and changed state S99F98 acknowledgement valid acknowledgement command reply event resolve pending command authoritative snapshot or update publish reconciled state Validate and dispatch Execute through EAP Acknowledge and reconcile Operator · browser · Sequence participant Operator browser OUI module · store + gateway · Sequence participant OUI module store + gateway RequestBroker · reply ownership · Sequence participant RequestBroker reply ownership EAPWebManager · UI_ handler · Sequence participant EAPWebManager UI_ handler PLUS · S99F97W / S99F98 · Sequence participant PLUS S99F97W / S99F98 Equipment EAP · EUI handler · Sequence participant Equipment EAP EUI handler Equipment · authoritative state · Sequence participant Equipment authoritative state Legend request return security async trace

Reply Ownership

  • • RequestBroker owns the expected reply before send
  • • Same-reply requests are serialized
  • • Timeout quarantine prevents a late reply from satisfying later work

Equipment Authority

  • • A command acknowledgement is not the final display state
  • • EAP remains authoritative for controls and process state
  • • OUI clears pending state only under the feature lifecycle rules

Failure Boundaries

  • • Validation can reject before PLUS transport
  • • Disconnect rejects pending broker work
  • • Stale generation results cannot mutate the selected equipment