```mermaid
stateDiagram-v2
    [*] --> Running
    Running --> [*]: operator stopped / close socket / retain checkpoint
    state Running {
        state Connection {
            [*] --> Connect
            Connect --> Reconcile: WebSocket over Unix socket / initialize
            Reconcile --> Listen: enumerate loaded threads / subscribe / read goal and latest turn
            Listen --> Reconcile: poll interval or retry deadline
            Reconcile --> Reconnect: connection failure
            Listen --> Reconnect: connection failure
            Connect --> Reconnect: connection failure
            Reconnect --> Connect: capped exponential backoff with jitter
        }
        --
        state "Per loaded thread; checkpointed across connections" as Recovery {
            [*] --> Observe
            Observe --> Armed: active goal and in-progress turn observed
            Armed --> Backoff: same goal blocked and same turn failed with transient API error
            Armed --> Observe: successful turn / reset failure count
            Armed --> Observe: human interrupt / pause / clear / replacement / limit / completion / non-transient error
            Backoff --> Check: persisted retry deadline reached
            Check --> Observe: goal changed / turn changed / thread active or unloaded
            Check --> Resume: same blocked goal / failed turn / thread idle or systemError
            Resume --> Armed: goal activated and new turn observed
            Resume --> Backoff: RPC failure / persist next retry
            Resume --> Observe: activation observed before next turn
            Backoff --> Observe: human pause / clear / replacement / limit / completion
            Observe --> Observe: existing blocked goal or non-transient failure
        }
    }
```