{
  "planPath": "archreview/plans/PLAN-01-cluster-host-failover.md",
  "tasks": [
    {
      "id": 1,
      "subject": "Task 1: Enable the SBR downing provider in BuildHocon",
      "status": "completed",
      "blockedBy": []
    },
    {
      "id": 2,
      "subject": "Task 2: Raise the cluster-leave CoordinatedShutdown phase timeout above the drain budget",
      "status": "completed",
      "blockedBy": [
        1
      ]
    },
    {
      "id": 3,
      "subject": "Task 3: Two-node in-process cluster fixture (the reusable failover rig)",
      "status": "completed",
      "blockedBy": [
        1
      ]
    },
    {
      "id": 4,
      "subject": "Task 4: SBR behavioral proof \u2014 DELIVERED as younger-node-crash (SBR downs it, oldest keeps singleton); the planned oldest-crash 'singleton migration' is impossible under 2-node keep-oldest \u2014 see master-tracker follow-up",
      "status": "completed",
      "blockedBy": [
        3
      ]
    },
    {
      "id": 5,
      "subject": "Task 5: ClusterActivityEvaluator \u2014 single oldest-member \"active node\" definition",
      "status": "completed",
      "blockedBy": []
    },
    {
      "id": 6,
      "subject": "Task 6: Rewire ActiveNodeGate, AkkaClusterNodeProvider and Primary labels onto the evaluator",
      "status": "completed",
      "blockedBy": [
        5
      ]
    },
    {
      "id": 7,
      "subject": "Task 7: Oldest-based /health/active check + require DB reachability for Active",
      "status": "completed",
      "blockedBy": [
        5
      ]
    },
    {
      "id": 8,
      "subject": "Task 8: Divergence proof \u2014 restarted first node must NOT become active again",
      "status": "completed",
      "blockedBy": [
        3,
        6
      ]
    },
    {
      "id": 9,
      "subject": "Task 9: CentralSingletonRegistrar helper (manager + drain task + proxy)",
      "status": "completed",
      "blockedBy": [
        2
      ]
    },
    {
      "id": 10,
      "subject": "Task 10: Route all seven central singletons through the registrar (adds missing outbox/ingest drains)",
      "status": "completed",
      "blockedBy": [
        9
      ]
    },
    {
      "id": 11,
      "subject": "Task 11: SiteHealthReportAck message + ack semantics in the communication actors",
      "status": "completed",
      "blockedBy": []
    },
    {
      "id": 12,
      "subject": "Task 12: Acked async health-report transport so counter-restore actually fires",
      "status": "completed",
      "blockedBy": [
        11
      ]
    },
    {
      "id": 13,
      "subject": "Task 13: Metrics-staleness signal + status-transition timestamps in the aggregator",
      "status": "completed",
      "blockedBy": []
    },
    {
      "id": 14,
      "subject": "Task 14: Surface metrics-stale + offline-since on the Health dashboard",
      "status": "completed",
      "blockedBy": [
        13
      ]
    },
    {
      "id": 15,
      "subject": "Task 15: Fix the metrics-port seed in appsettings.Site.json + close the validator gap",
      "status": "completed",
      "blockedBy": []
    },
    {
      "id": 16,
      "subject": "Task 16: Single-node installs \u2014 explicit AllowSingleNodeCluster instead of phantom seeds",
      "status": "completed",
      "blockedBy": []
    },
    {
      "id": 17,
      "subject": "Task 17: stop_grace_period for all app containers (both topologies)",
      "status": "completed",
      "blockedBy": []
    },
    {
      "id": 18,
      "subject": "Task 18: Evict deleted sites from the health aggregator",
      "status": "completed",
      "blockedBy": [
        13
      ]
    },
    {
      "id": 19,
      "subject": "Task 19: Rate-limit dead-letter warnings",
      "status": "completed",
      "blockedBy": []
    },
    {
      "id": 20,
      "subject": "Task 20: Down-if-alone recovery \u2014 exit on unexpected ActorSystem termination + service restart actions",
      "status": "completed",
      "blockedBy": [
        10
      ]
    },
    {
      "id": 21,
      "subject": "Task 21: Docker failover drill script (manual/CI kill test against the real topology)",
      "status": "completed",
      "blockedBy": [
        1,
        17
      ]
    },
    {
      "id": 22,
      "subject": "Task 22: Reconcile REQ-HOST-6 (Akka.Hosting) with the hand-rolled bootstrap",
      "status": "completed",
      "blockedBy": [
        1
      ]
    },
    {
      "id": 23,
      "subject": "Task 23: Docs & deploy-config cleanup batch (Traefik doc, NodeName overlays, TLS roadmap note)",
      "status": "completed",
      "blockedBy": [
        7,
        16
      ]
    }
  ],
  "lastUpdated": "2026-07-08"
}