diff --git a/docs/plans/2026-06-06-equipment-namespace-structure-milestone.md.tasks.json b/docs/plans/2026-06-06-equipment-namespace-structure-milestone.md.tasks.json
index 11824f39..93b5e6ac 100644
--- a/docs/plans/2026-06-06-equipment-namespace-structure-milestone.md.tasks.json
+++ b/docs/plans/2026-06-06-equipment-namespace-structure-milestone.md.tasks.json
@@ -8,7 +8,7 @@
     {"id": 2, "nativeTaskId": 88, "subject": "Task 2: Materialise equipment signals in the live rebuild", "status": "completed", "blockedBy": [87]},
     {"id": 3, "nativeTaskId": 89, "subject": "Task 3: Friendly browse names for UNS folders", "status": "completed", "blockedBy": [87]},
     {"id": 4, "nativeTaskId": 90, "subject": "Task 4: Idempotency + restart-safety", "status": "completed", "blockedBy": [88]},
-    {"id": 5, "nativeTaskId": 91, "subject": "Task 5: docker-dev integration verification + tool support", "status": "pending", "blockedBy": [88, 89]}
+    {"id": 5, "nativeTaskId": 91, "subject": "Task 5: docker-dev integration verification + tool support", "status": "completed", "blockedBy": [88, 89]}
   ],
   "lastUpdated": "2026-06-06"
 }
diff --git a/tests/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer.Tests/Phase7ApplierHierarchyTests.cs b/tests/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer.Tests/Phase7ApplierHierarchyTests.cs
index 46d3a95f..ae8610fe 100644
--- a/tests/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer.Tests/Phase7ApplierHierarchyTests.cs
+++ b/tests/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer.Tests/Phase7ApplierHierarchyTests.cs
@@ -4,6 +4,8 @@ using Opc.Ua.Server;
 using Shouldly;
 using Xunit;
 using ZB.MOM.WW.OtOpcUa.Commons.OpcUa;
+using ZB.MOM.WW.OtOpcUa.Configuration.Entities;
+using ZB.MOM.WW.OtOpcUa.Configuration.Enums;
 
 namespace ZB.MOM.WW.OtOpcUa.OpcUaServer.Tests;
 
@@ -158,6 +160,61 @@ public sealed class Phase7ApplierHierarchyTests : IDisposable
         sdkServer.NodeManager!.VariableCount.ShouldBe(1); // single variable despite the double-apply
     }
 
+    /// <summary>
+    ///     Full structure-materialisation pipeline against a real SDK node manager: real Config
+    ///     entities (Area / Line / Equipment + an Equipment-namespace Tag) → <see cref="Phase7Composer.Compose"/>
+    ///     → MaterialiseHierarchy + MaterialiseEquipmentTags → <see cref="OtOpcUaNodeManager"/>. Proves
+    ///     an Equipment namespace lands its Area/Line/Equipment folder tree + the equipment-signal
+    ///     Variable in a live OPC UA address space (structure-only; live values are a later milestone).
+    ///     Also covers the compose-side EquipmentTags extraction. The cluster-level deploy +
+    ///     network-browse E2E (Host.IntegrationTests) needs the docker-dev fixture and is tracked
+    ///     as a follow-up.
+    /// </summary>
+    [Fact]
+    public async Task Equipment_namespace_structure_materialises_end_to_end_against_real_SDK()
+    {
+        await using var host = new OpcUaApplicationHost(
+            new OpcUaApplicationHostOptions
+            {
+                ApplicationName = "OtOpcUa.EquipmentE2e",
+                ApplicationUri = $"urn:OtOpcUa.EquipmentE2e:{Guid.NewGuid():N}",
+                OpcUaPort = AllocateFreePort(),
+                PublicHostname = "localhost",
+                PkiStoreRoot = _pkiRoot,
+            },
+            NullLogger<OpcUaApplicationHost>.Instance);
+
+        var sdkServer = new OtOpcUaSdkServer();
+        await host.StartAsync(sdkServer, Ct);
+        sdkServer.NodeManager.ShouldNotBeNull();
+
+        // One area / line / equipment + a Modbus FK driver in an Equipment-kind namespace, with a
+        // single equipment-bound Tag (the signal). Equipment.Name is the UNS browse segment.
+        var ns = new Namespace { NamespaceId = "ns-eq", ClusterId = "c1", Kind = NamespaceKind.Equipment, NamespaceUri = "urn:eq" };
+        var driver = new DriverInstance { DriverInstanceId = "drv-modbus", ClusterId = "c1", NamespaceId = "ns-eq", Name = "Modbus", DriverType = "Modbus", DriverConfig = "{}" };
+        var area = new UnsArea { UnsAreaId = "nw-area-filling", ClusterId = "c1", Name = "filling" };
+        var line = new UnsLine { UnsLineId = "nw-line-1", UnsAreaId = "nw-area-filling", Name = "line-1" };
+        var equipment = new Equipment { EquipmentId = "eq-1", DriverInstanceId = "drv-modbus", UnsLineId = "nw-line-1", Name = "station-1", MachineCode = "STATION_001" };
+        var tag = new Tag { TagId = "tag-speed", DriverInstanceId = "drv-modbus", EquipmentId = "eq-1", Name = "Speed", DataType = "Float", AccessLevel = TagAccessLevel.Read, TagConfig = "{\"FullName\":\"40001\"}" };
+
+        var composition = Phase7Composer.Compose(
+            new[] { area }, new[] { line }, new[] { equipment }, new[] { driver },
+            Array.Empty<ScriptedAlarm>(), new[] { tag }, new[] { ns });
+
+        // Compose-side EquipmentTags extraction (the inverse of the Galaxy filter).
+        var planned = composition.EquipmentTags.ShouldHaveSingleItem();
+        planned.EquipmentId.ShouldBe("eq-1");
+        planned.FullName.ShouldBe("40001");
+
+        var sink = new SdkAddressSpaceSink(sdkServer.NodeManager!);
+        var applier = new Phase7Applier(sink, NullLogger<Phase7Applier>.Instance);
+        applier.MaterialiseHierarchy(composition);
+        applier.MaterialiseEquipmentTags(composition);
+
+        sdkServer.NodeManager!.FolderCount.ShouldBe(3);   // filling area + line-1 + station-1 equipment
+        sdkServer.NodeManager!.VariableCount.ShouldBe(1); // the Speed signal under the equipment folder
+    }
+
     private static int AllocateFreePort()
     {
         using var listener = new System.Net.Sockets.TcpListener(System.Net.IPAddress.Loopback, 0);