diff --git a/archreview/plans/R2-11-tagconfig-consolidation-plan.md.tasks.json b/archreview/plans/R2-11-tagconfig-consolidation-plan.md.tasks.json
index 32a9a4cc..85846869 100644
--- a/archreview/plans/R2-11-tagconfig-consolidation-plan.md.tasks.json
+++ b/archreview/plans/R2-11-tagconfig-consolidation-plan.md.tasks.json
@@ -9,7 +9,7 @@
     { "id": "T5",  "subject": "AddressSpaceComposer swap: single TagConfigIntent.Parse per tag, delete 4 Extract* statics (P-1 parse-once)", "status": "completed", "blockedBy": ["T1", "T3"] },
     { "id": "T6",  "subject": "Device-host re-home: composer TryExtractDeviceHost/NormalizeDeviceHost → DeviceConfigIntent; update DriverHostActor + DeploymentArtifact callers", "status": "completed", "blockedBy": ["T4", "T5"] },
     { "id": "T7",  "subject": "DeploymentArtifact swap: delete 4 private mirrors, parse once per tag element via TagConfigIntent", "status": "completed", "blockedBy": ["T5"] },
-    { "id": "T8",  "subject": "DraftValidator swap: Configuration→Commons ProjectReference; ExtractTagConfigFullName → TagConfigIntent.ExplicitFullName (null-on-absent preserved)", "status": "pending", "blockedBy": ["T2", "T3"] },
+    { "id": "T8",  "subject": "DraftValidator swap: Configuration→Commons ProjectReference; ExtractTagConfigFullName → TagConfigIntent.ExplicitFullName (null-on-absent preserved)", "status": "completed", "blockedBy": ["T2", "T3"] },
     { "id": "T9",  "subject": "EquipmentNodeWalker.ExtractFullName delegates to TagConfigIntent; repoint tree-wide canonical-parser doc cites", "status": "pending", "blockedBy": ["T2", "T3"] },
     { "id": "T10", "subject": "Retire OpcUaServer.Tests ExtractTag*Tests (authority moved to Commons.Tests); verify zero 'MUST parse identically' hits", "status": "pending", "blockedBy": ["T3", "T5"] },
     { "id": "T11", "subject": "TagConfigJson strict-capable readers in Core.Abstractions (TryReadEnum Absent/Valid/Invalid, ReadEnumOrDefault, ReadWritable, DescribeInvalidEnum) (TDD)", "status": "pending", "blockedBy": [] },
diff --git a/src/Core/ZB.MOM.WW.OtOpcUa.Configuration/Validation/DraftValidator.cs b/src/Core/ZB.MOM.WW.OtOpcUa.Configuration/Validation/DraftValidator.cs
index b5ba029d..e1c18e8e 100644
--- a/src/Core/ZB.MOM.WW.OtOpcUa.Configuration/Validation/DraftValidator.cs
+++ b/src/Core/ZB.MOM.WW.OtOpcUa.Configuration/Validation/DraftValidator.cs
@@ -1,4 +1,5 @@
 using System.Text.RegularExpressions;
+using ZB.MOM.WW.OtOpcUa.Commons.Types;
 using ZB.MOM.WW.OtOpcUa.Configuration.Entities;
 using ZB.MOM.WW.OtOpcUa.Configuration.Enums;
 
@@ -47,29 +48,16 @@ public static class DraftValidator
             if (t.EquipmentId is null) continue;
             if (!typeByDriver.TryGetValue(t.DriverInstanceId, out var dtype) || dtype != "GalaxyMxGateway")
                 continue;
-            if (string.IsNullOrWhiteSpace(ExtractTagConfigFullName(t.TagConfig)))
+            // The Galaxy rule wants the EXPLICIT reference, not the raw-blob fallback — so it reads
+            // TagConfigIntent.ExplicitFullName (the "FullName" property only when present-and-string,
+            // else null), preserving the historical null-on-absent semantics by construction (R2-11).
+            if (string.IsNullOrWhiteSpace(TagConfigIntent.Parse(t.TagConfig).ExplicitFullName))
                 errors.Add(new("GalaxyTagMissingReference",
                     $"Galaxy tag '{t.TagId}' on equipment '{t.EquipmentId}' is missing a Galaxy reference (TagConfig.FullName)",
                     t.TagId));
         }
     }
 
-    // Minimal reader for the top-level "FullName" string in a tag's schemaless TagConfig JSON
-    // (mirrors AddressSpaceComposer.ExtractTagFullName — a small local copy, consistent with this codebase
-    // where the composer keeps its own).
-    private static string? ExtractTagConfigFullName(string? tagConfig)
-    {
-        if (string.IsNullOrWhiteSpace(tagConfig)) return null;
-        try
-        {
-            using var doc = System.Text.Json.JsonDocument.Parse(tagConfig);
-            return doc.RootElement.ValueKind == System.Text.Json.JsonValueKind.Object
-                && doc.RootElement.TryGetProperty("FullName", out var fn)
-                && fn.ValueKind == System.Text.Json.JsonValueKind.String ? fn.GetString() : null;
-        }
-        catch (System.Text.Json.JsonException) { return null; }
-    }
-
     private static void ValidateNoEquipmentSignalNameCollision(DraftSnapshot draft, List<ValidationError> errors)
     {
         // Materialiser NodeId key: "{EquipmentId}[/{FolderPath}]/{Name}". Tag (EquipmentId != null) and
diff --git a/src/Core/ZB.MOM.WW.OtOpcUa.Configuration/ZB.MOM.WW.OtOpcUa.Configuration.csproj b/src/Core/ZB.MOM.WW.OtOpcUa.Configuration/ZB.MOM.WW.OtOpcUa.Configuration.csproj
index aaf2d613..4b014f63 100644
--- a/src/Core/ZB.MOM.WW.OtOpcUa.Configuration/ZB.MOM.WW.OtOpcUa.Configuration.csproj
+++ b/src/Core/ZB.MOM.WW.OtOpcUa.Configuration/ZB.MOM.WW.OtOpcUa.Configuration.csproj
@@ -27,6 +27,9 @@
 
     <ItemGroup>
         <ProjectReference Include="..\ZB.MOM.WW.OtOpcUa.Core.Abstractions\ZB.MOM.WW.OtOpcUa.Core.Abstractions.csproj"/>
+        <!-- R2-11 (01/C-1): consume the shared TagConfigIntent.Parse byte-parity authority in Commons.
+             Cycle-safe — Commons has zero in-repo ProjectReferences. -->
+        <ProjectReference Include="..\ZB.MOM.WW.OtOpcUa.Commons\ZB.MOM.WW.OtOpcUa.Commons.csproj"/>
     </ItemGroup>
 
 </Project>