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 85846869..92f4e5b6 100644
--- a/archreview/plans/R2-11-tagconfig-consolidation-plan.md.tasks.json
+++ b/archreview/plans/R2-11-tagconfig-consolidation-plan.md.tasks.json
@@ -10,7 +10,7 @@
     { "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": "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": "T9",  "subject": "EquipmentNodeWalker.ExtractFullName delegates to TagConfigIntent; repoint tree-wide canonical-parser doc cites", "status": "completed", "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": [] },
     { "id": "T12", "subject": "Modbus equipment-tag parser: freeze test, shared readers, honour writable key, Inspect warnings", "status": "pending", "blockedBy": ["T11"] },
diff --git a/src/Core/ZB.MOM.WW.OtOpcUa.Core/OpcUa/EquipmentNodeWalker.cs b/src/Core/ZB.MOM.WW.OtOpcUa.Core/OpcUa/EquipmentNodeWalker.cs
index 217cca88..96eacf2b 100644
--- a/src/Core/ZB.MOM.WW.OtOpcUa.Core/OpcUa/EquipmentNodeWalker.cs
+++ b/src/Core/ZB.MOM.WW.OtOpcUa.Core/OpcUa/EquipmentNodeWalker.cs
@@ -1,4 +1,4 @@
-using System.Text.Json;
+using ZB.MOM.WW.OtOpcUa.Commons.Types;
 using ZB.MOM.WW.OtOpcUa.Configuration.Entities;
 using ZB.MOM.WW.OtOpcUa.Core.Abstractions;
 
@@ -190,22 +190,8 @@ public static class EquipmentNodeWalker
     /// </remarks>
     /// <param name="tagConfig">The tag configuration JSON or string.</param>
     /// <returns>The extracted <c>FullName</c> value, or the raw <paramref name="tagConfig"/> if it can't be extracted.</returns>
-    internal static string ExtractFullName(string tagConfig)
-    {
-        if (string.IsNullOrWhiteSpace(tagConfig)) return tagConfig;
-        try
-        {
-            using var doc = JsonDocument.Parse(tagConfig);
-            if (doc.RootElement.ValueKind == JsonValueKind.Object
-                && doc.RootElement.TryGetProperty("FullName", out var fullName)
-                && fullName.ValueKind == JsonValueKind.String)
-            {
-                return fullName.GetString() ?? tagConfig;
-            }
-        }
-        catch (JsonException) { /* fall through */ }
-        return tagConfig;
-    }
+    internal static string ExtractFullName(string tagConfig) =>
+        TagConfigIntent.Parse(tagConfig).FullName;
 
     /// <summary>
     ///     Parse <see cref="Tag.DataType"/> (stored as the <see cref="DriverDataType"/> enum
diff --git a/src/Core/ZB.MOM.WW.OtOpcUa.Core/ZB.MOM.WW.OtOpcUa.Core.csproj b/src/Core/ZB.MOM.WW.OtOpcUa.Core/ZB.MOM.WW.OtOpcUa.Core.csproj
index 44c4f648..6cd66876 100644
--- a/src/Core/ZB.MOM.WW.OtOpcUa.Core/ZB.MOM.WW.OtOpcUa.Core.csproj
+++ b/src/Core/ZB.MOM.WW.OtOpcUa.Core/ZB.MOM.WW.OtOpcUa.Core.csproj
@@ -14,6 +14,8 @@
     <ItemGroup>
         <ProjectReference Include="..\ZB.MOM.WW.OtOpcUa.Core.Abstractions\ZB.MOM.WW.OtOpcUa.Core.Abstractions.csproj"/>
         <ProjectReference Include="..\ZB.MOM.WW.OtOpcUa.Configuration\ZB.MOM.WW.OtOpcUa.Configuration.csproj"/>
+        <!-- R2-11: EquipmentNodeWalker.ExtractFullName delegates to the shared TagConfigIntent.Parse. -->
+        <ProjectReference Include="..\ZB.MOM.WW.OtOpcUa.Commons\ZB.MOM.WW.OtOpcUa.Commons.csproj"/>
     </ItemGroup>
 
     <ItemGroup>
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ScriptAnalysis/IScriptTagCatalog.cs b/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ScriptAnalysis/IScriptTagCatalog.cs
index fe607acc..8e8eea22 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ScriptAnalysis/IScriptTagCatalog.cs
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ScriptAnalysis/IScriptTagCatalog.cs
@@ -53,7 +53,7 @@ public sealed record ScriptTagInfo(string Path, string Kind, string DataType, st
 ///         <c>DriverInstanceActor.AttributeValuePublished.FullReference</c>
 ///         (<c>src/Server/…Runtime/VirtualTags/DependencyMuxActor.cs:97</c>) — and that
 ///         <c>FullReference</c> is the <c>FullName</c> field extracted from <c>Tag.TagConfig</c>
-///         (see <c>AddressSpaceComposer.ExtractTagFullName</c> + <c>EquipmentNodeWalker.ExtractFullName</c>).
+///         (see <c>Commons.Types.TagConfigIntent.Parse</c>, the shared byte-parity FullName authority).
 ///         The UNS-path engine (<c>Core.VirtualTags.VirtualTagEngine</c>, keyed by a slash-joined
 ///         <c>Enterprise/Site/Area/Line/Equipment/TagName</c>) is dormant — it is NOT wired into the
 ///         host — so UNS browse paths never resolve at runtime and are intentionally NOT suggested.
@@ -179,8 +179,8 @@ public sealed class ScriptTagCatalog(IDbContextFactory<OtOpcUaConfigDbContext> d
     /// <summary>
     ///     Extracts the driver-side full reference from a <c>Tag.TagConfig</c> JSON blob — the
     ///     top-level <c>FullName</c> string every shipped driver stores. Mirrors
-    ///     <c>EquipmentNodeWalker.ExtractFullName</c> / <c>AddressSpaceComposer.ExtractTagFullName</c>
-    ///     (AdminUI does not reference those assemblies). Falls back to the raw blob when it is not
+    ///     <c>Commons.Types.TagConfigIntent.Parse(...).FullName</c> (the shared byte-parity authority;
+    ///     AdminUI does not reference that assembly here). Falls back to the raw blob when it is not
     ///     a JSON object carrying a string <c>FullName</c>.
     /// </summary>
     private static string ExtractFullNameFromTagConfig(string tagConfig)
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Uns/TagEditors/OpcUaClientTagConfigModel.cs b/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Uns/TagEditors/OpcUaClientTagConfigModel.cs
index 82a6348b..86deb8ee 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Uns/TagEditors/OpcUaClientTagConfigModel.cs
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Uns/TagEditors/OpcUaClientTagConfigModel.cs
@@ -7,9 +7,9 @@ namespace ZB.MOM.WW.OtOpcUa.AdminUI.Uns.TagEditors;
 /// stable <c>nsu=…;s=…</c> or plain <c>ns=2;s=…</c> NodeId the driver reads/writes/subscribes against).
 /// Preserves unrecognised JSON keys across a load→save.</summary>
 /// <remarks>
-///     The <c>FullName</c> key is intentionally PascalCase: the deploy-time composer + node walker
-///     (<c>AddressSpaceComposer.ExtractTagFullName</c>, <c>EquipmentNodeWalker</c>) read it via a
-///     case-sensitive <c>TryGetProperty("FullName", …)</c>, so the editor MUST persist that exact
+///     The <c>FullName</c> key is intentionally PascalCase: the shared deploy-time parser
+///     (<c>Commons.Types.TagConfigIntent.Parse</c>, consumed by the composer, artifact decoder, draft
+///     gate, and node walker) reads it via a case-sensitive <c>TryGetProperty("FullName", …)</c>, so the editor MUST persist that exact
 ///     casing. The driver-agnostic server-side HistoryRead intent keys (<c>isHistorized</c> /
 ///     <c>historianTagname</c>) are NOT modelled here — they are owned by the TagModal-merge seam
 ///     (<see cref="TagHistorizeConfig"/>) and survive a load→save of this model as preserved unknown keys.
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer/AddressSpaceApplier.cs b/src/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer/AddressSpaceApplier.cs
index 3fba3d99..b3980942 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer/AddressSpaceApplier.cs
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer/AddressSpaceApplier.cs
@@ -647,7 +647,7 @@ public sealed class AddressSpaceApplier
     // REACH (live-verified): the shape path only fires for drivers whose TagConfig carries a stable
     // top-level "FullName" (Galaxy = tag_name.AttributeName; OpcUaClient = the node id) — there a DataType/array
     // edit leaves FullName untouched ⇒ surgical. For structured-TagConfig protocol drivers (Modbus/S7/AbCip/…)
-    // AddressSpaceComposer.ExtractTagFullName falls back to the RAW TagConfig blob as FullName, so a DataType/
+    // TagConfigIntent.Parse falls back to the RAW TagConfig blob as FullName, so a DataType/
     // array edit also mutates that blob ⇒ FullName differs ⇒ this returns false ⇒ full rebuild. That is the
     // correct safe default (a protocol driver's subscription needs re-spawning for a new shape anyway).
     private static bool TagDeltaIsSurgicalEligible(AddressSpacePlan.EquipmentTagDelta d) =>