diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DeploymentArtifact.cs b/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DeploymentArtifact.cs
index a99f5c22..5e5bd575 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DeploymentArtifact.cs
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DeploymentArtifact.cs
@@ -523,6 +523,14 @@ public static class DeploymentArtifact
             var source = scriptId is not null && scriptSourceById.TryGetValue(scriptId, out var src)
                 ? src : string.Empty;
 
+            // Historize: the artifact carries a Pascal-case "Historize" bool (ConfigComposer serialises
+            // the whole VirtualTag entity with DefaultIgnoreCondition.Never). Robust parse — default
+            // false; only honoured when the JSON value is an actual boolean — so absent/non-bool ⇒ false,
+            // byte-parity with Phase7Composer's entity-default-false behaviour.
+            var historize = el.TryGetProperty("Historize", out var hEl)
+                && (hEl.ValueKind == JsonValueKind.True || hEl.ValueKind == JsonValueKind.False)
+                && hEl.GetBoolean();
+
             // Substitute the {{equip}} token with the owning equipment's tag base BEFORE extracting
             // refs, so both Expression and DependencyRefs are machine-specific — byte-parity with
             // Phase7Composer.Compose.
@@ -536,7 +544,8 @@ public static class DeploymentArtifact
                 Name: name!,
                 DataType: dataType ?? "BaseDataType",
                 Expression: expanded,
-                DependencyRefs: EquipmentScriptPaths.ExtractDependencyRefs(expanded)));
+                DependencyRefs: EquipmentScriptPaths.ExtractDependencyRefs(expanded),
+                Historize: historize));
         }
 
         result.Sort((a, b) =>
diff --git a/tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DeploymentArtifactVirtualTagHistorizeParityTests.cs b/tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DeploymentArtifactVirtualTagHistorizeParityTests.cs
new file mode 100644
index 00000000..6410bd64
--- /dev/null
+++ b/tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DeploymentArtifactVirtualTagHistorizeParityTests.cs
@@ -0,0 +1,172 @@
+using System.Linq;
+using System.Text.Json;
+using Shouldly;
+using Xunit;
+using ZB.MOM.WW.OtOpcUa.Configuration.Entities;
+using ZB.MOM.WW.OtOpcUa.Configuration.Enums;
+using ZB.MOM.WW.OtOpcUa.OpcUaServer;
+using ZB.MOM.WW.OtOpcUa.Runtime.Drivers;
+
+namespace ZB.MOM.WW.OtOpcUa.Runtime.Tests.Drivers;
+
+/// <summary>
+///     Byte-parity tests for the VirtualTag <c>Historize</c> flag across the artifact-decode path
+///     (<c>DeploymentArtifact.BuildEquipmentVirtualTagPlans</c>) and the live compose seam
+///     (<c>Phase7Composer.Compose</c>) — H5b. The artifact JSON already carries a Pascal-case
+///     <c>"Historize"</c> bool (ConfigComposer serialises the whole VirtualTag entity with
+///     <c>DefaultIgnoreCondition.Never</c>); the decode just had to read it. Both sides default to
+///     <c>false</c> when the flag is unset/absent/non-bool, so the decoded plans must equal the
+///     composer's element-wise (the record has value equality including Historize). Mirrors
+///     <c>DeploymentArtifactScriptedAlarmParityTests</c>.
+/// </summary>
+public sealed class DeploymentArtifactVirtualTagHistorizeParityTests
+{
+    private static byte[] BlobOf(object snapshot) => JsonSerializer.SerializeToUtf8Bytes(snapshot);
+
+    [Fact]
+    public void ParseComposition_virtual_tag_historize_is_byte_parity_with_composer()
+    {
+        var ns = new Namespace
+        {
+            NamespaceId = "ns-eq",
+            ClusterId = "c1",
+            Kind = NamespaceKind.Equipment,
+            NamespaceUri = "urn:eq",
+        };
+        var driver = new DriverInstance
+        {
+            DriverInstanceId = "drv-1",
+            ClusterId = "c1",
+            NamespaceId = "ns-eq",
+            Name = "Modbus1",
+            DriverType = "Modbus",
+            DriverConfig = "{}",
+        };
+        var area = new UnsArea { UnsAreaId = "area-1", ClusterId = "c1", Name = "filling" };
+        var line = new UnsLine { UnsLineId = "line-1", UnsAreaId = "area-1", Name = "line-1" };
+        var equip = new Equipment { EquipmentId = "eq-1", DriverInstanceId = "drv-1", UnsLineId = "line-1", Name = "TestMachine_001", MachineCode = "TESTMACHINE_001" };
+        var tag = new Tag
+        {
+            TagId = "tag-1",
+            DriverInstanceId = "drv-1",
+            EquipmentId = "eq-1",
+            Name = "Source",
+            DataType = "Int32",
+            AccessLevel = TagAccessLevel.Read,
+            TagConfig = "{\"FullName\":\"TestMachine_001.Source\",\"DataType\":\"Int32\"}",
+        };
+        var script = new Script
+        {
+            ScriptId = "s-1",
+            Name = "passthru",
+            SourceCode = "return ctx.GetTag(\"TestMachine_001.Source\").Value;",
+            SourceHash = "hash-1",
+        };
+        var vtHist = new VirtualTag { VirtualTagId = "vt-hist", EquipmentId = "eq-1", Name = "Historized", DataType = "Int32", ScriptId = "s-1", Historize = true };
+        var vtPlain = new VirtualTag { VirtualTagId = "vt-plain", EquipmentId = "eq-1", Name = "Plain", DataType = "Int32", ScriptId = "s-1", Historize = false };
+
+        var composed = Phase7Composer.Compose(
+            new[] { area }, new[] { line }, new[] { equip },
+            new[] { driver }, Array.Empty<ScriptedAlarm>(),
+            new[] { tag }, new[] { ns },
+            virtualTags: new[] { vtHist, vtPlain },
+            scripts: new[] { script });
+
+        // The artifact blob the write side (ConfigComposer) emits: the FULL VirtualTag entity
+        // serialised Pascal-case off EF, including the Historize bool.
+        var blob = BlobOf(new
+        {
+            Namespaces = new[] { new { NamespaceId = "ns-eq", Kind = 0 } },
+            DriverInstances = new[]
+            {
+                new { DriverInstanceId = "drv-1", DriverType = "Modbus", DriverConfig = "{}", NamespaceId = "ns-eq" },
+            },
+            Tags = new object[]
+            {
+                new
+                {
+                    TagId = "tag-1",
+                    DriverInstanceId = "drv-1",
+                    EquipmentId = "eq-1",
+                    Name = "Source",
+                    FolderPath = (string?)null,
+                    DataType = "Int32",
+                    TagConfig = "{\"FullName\":\"TestMachine_001.Source\",\"DataType\":\"Int32\"}",
+                },
+            },
+            Scripts = new[]
+            {
+                new { ScriptId = "s-1", SourceCode = "return ctx.GetTag(\"TestMachine_001.Source\").Value;" },
+            },
+            VirtualTags = new[]
+            {
+                ToSnapshot(vtHist),
+                ToSnapshot(vtPlain),
+            },
+        });
+
+        var decoded = DeploymentArtifact.ParseComposition(blob);
+
+        decoded.EquipmentVirtualTags.Count.ShouldBe(2);
+        decoded.EquipmentVirtualTags.Single(p => p.VirtualTagId == "vt-hist").Historize.ShouldBeTrue();
+        decoded.EquipmentVirtualTags.Single(p => p.VirtualTagId == "vt-plain").Historize.ShouldBeFalse();
+
+        // Byte-parity: element-wise value equality (record equality includes Historize).
+        decoded.EquipmentVirtualTags.SequenceEqual(composed.EquipmentVirtualTags).ShouldBeTrue();
+    }
+
+    [Fact]
+    public void ParseComposition_absent_historize_defaults_false()
+    {
+        // A VirtualTag object with NO "Historize" property at all (older artifact / unset) decodes
+        // to false — same default the composer uses for an unset entity column.
+        var blob = BlobOf(new
+        {
+            Namespaces = new[] { new { NamespaceId = "ns-eq", Kind = 0 } },
+            DriverInstances = new[]
+            {
+                new { DriverInstanceId = "drv-1", DriverType = "Modbus", DriverConfig = "{}", NamespaceId = "ns-eq" },
+            },
+            Tags = new object[]
+            {
+                new
+                {
+                    TagId = "tag-1",
+                    DriverInstanceId = "drv-1",
+                    EquipmentId = "eq-1",
+                    Name = "Source",
+                    FolderPath = (string?)null,
+                    DataType = "Int32",
+                    TagConfig = "{\"FullName\":\"TestMachine_001.Source\"}",
+                },
+            },
+            Scripts = new[]
+            {
+                new { ScriptId = "s-1", SourceCode = "return ctx.GetTag(\"TestMachine_001.Source\").Value;" },
+            },
+            VirtualTags = new[]
+            {
+                new { VirtualTagId = "vt-1", EquipmentId = "eq-1", Name = "NoHistorize", DataType = "Int32", ScriptId = "s-1" },
+            },
+        });
+
+        var decoded = DeploymentArtifact.ParseComposition(blob);
+
+        decoded.EquipmentVirtualTags.ShouldHaveSingleItem().Historize.ShouldBeFalse();
+    }
+
+    // The Pascal-case snapshot a VirtualTag EF entity serialises to (matches ConfigComposer's
+    // DefaultIgnoreCondition.Never whole-entity serialisation — includes Historize).
+    private static object ToSnapshot(VirtualTag v) => new
+    {
+        v.VirtualTagId,
+        v.EquipmentId,
+        v.Name,
+        v.DataType,
+        v.ScriptId,
+        v.ChangeTriggered,
+        v.TimerIntervalMs,
+        v.Historize,
+        v.Enabled,
+    };
+}