diff --git a/archreview/plans/R2-10-resilience-observability-plan.md.tasks.json b/archreview/plans/R2-10-resilience-observability-plan.md.tasks.json
index a3879c72..39fc2774 100644
--- a/archreview/plans/R2-10-resilience-observability-plan.md.tasks.json
+++ b/archreview/plans/R2-10-resilience-observability-plan.md.tasks.json
@@ -5,7 +5,7 @@
     { "id": "T1", "subject": "Tracker: LastBreakerClosedUtc + IsBreakerOpen + RecordBreakerClose (Core, TDD in DriverResilienceStatusTrackerTests)", "status": "completed", "blockedBy": [] },
     { "id": "T2", "subject": "Builder: OnClosed records breaker-close on the tracker (TDD in DriverResiliencePipelineBuilderTests)", "status": "completed", "blockedBy": ["T1"] },
     { "id": "T3", "subject": "Invoker: successful Execute* resets ConsecutiveFailures (TDD in CapabilityInvokerTests)", "status": "completed", "blockedBy": ["T1"] },
-    { "id": "T4", "subject": "Commons: DriverResilienceStatusChanged record + driver-resilience-status TopicName", "status": "pending", "blockedBy": [] },
+    { "id": "T4", "subject": "Commons: DriverResilienceStatusChanged record + driver-resilience-status TopicName", "status": "completed", "blockedBy": [] },
     { "id": "T5", "subject": "Host: DriverResilienceStatusPublisherService (BuildMessages mapping + 5s DPS timer shell; TDD mapping in Host.IntegrationTests)", "status": "pending", "blockedBy": ["T1", "T4"] },
     { "id": "T6", "subject": "Host DI: register the publisher in AddOtOpcUaDriverFactories + ResilienceStatusReaderRegistrationTests wiring guard (tracker HAS a production reader)", "status": "pending", "blockedBy": ["T5"] },
     { "id": "T7", "subject": "AdminUI: IDriverResilienceStatusStore + InMemory impl + AddOtOpcUaDriverStatusServices registration (TDD mirroring DriverStatusSnapshotStoreTests)", "status": "pending", "blockedBy": ["T4"] },
diff --git a/src/Core/ZB.MOM.WW.OtOpcUa.Commons/Messages/Drivers/DriverResilienceStatusChanged.cs b/src/Core/ZB.MOM.WW.OtOpcUa.Commons/Messages/Drivers/DriverResilienceStatusChanged.cs
new file mode 100644
index 00000000..b167dfe1
--- /dev/null
+++ b/src/Core/ZB.MOM.WW.OtOpcUa.Commons/Messages/Drivers/DriverResilienceStatusChanged.cs
@@ -0,0 +1,35 @@
+namespace ZB.MOM.WW.OtOpcUa.Commons.Messages.Drivers;
+
+/// <summary>
+///     Snapshot of one driver instance's live resilience counters for a single target host,
+///     published periodically to the <c>driver-resilience-status</c> DistributedPubSub topic by
+///     <c>DriverResilienceStatusPublisherService</c> (Host, driver-role nodes) and consumed by the
+///     AdminUI <c>DriverResilienceStatusBridge</c> → <c>IDriverResilienceStatusStore</c> →
+///     resilience section of the driver status panel. Mirrors the <see cref="DriverHealthChanged"/>
+///     flow one-for-one; a separate topic keeps the two feeds (event-driven health vs. periodic
+///     resilience) decoupled.
+/// </summary>
+/// <param name="DriverInstanceId">Globally-unique driver instance ID (the panel filters on this alone).</param>
+/// <param name="HostName">Target host the counters aggregate for (per-device breaker isolation key).</param>
+/// <param name="BreakerOpen">Whether the circuit breaker is currently open for this (instance, host).</param>
+/// <param name="ConsecutiveFailures">Consecutive pipeline failures — nonzero only during an active retry storm.</param>
+/// <param name="CurrentInFlight">In-flight capability-call depth against this (instance, host).</param>
+/// <param name="LastBreakerOpenUtc">UTC of the most recent breaker-open event; null if never.</param>
+/// <param name="LastSampledUtc">UTC the tracker counters were last updated.</param>
+/// <param name="PublishedUtc">UTC this snapshot was published (drives staleness detection in the panel).</param>
+public sealed record DriverResilienceStatusChanged(
+    string DriverInstanceId,
+    string HostName,
+    bool BreakerOpen,
+    int ConsecutiveFailures,
+    int CurrentInFlight,
+    DateTime? LastBreakerOpenUtc,
+    DateTime LastSampledUtc,
+    DateTime PublishedUtc)
+{
+    /// <summary>
+    ///     DPS topic name. Both the Host publisher and the AdminUI bridge reference this single
+    ///     constant on the contract so a rename can't silently desynchronise publisher and subscriber.
+    /// </summary>
+    public const string TopicName = "driver-resilience-status";
+}