diff --git a/dotnet/src/ZB.MOM.NatsNet.Server/JetStream/JetStreamClusterTypes.cs b/dotnet/src/ZB.MOM.NatsNet.Server/JetStream/JetStreamClusterTypes.cs
index 75b0321..c5d149e 100644
--- a/dotnet/src/ZB.MOM.NatsNet.Server/JetStream/JetStreamClusterTypes.cs
+++ b/dotnet/src/ZB.MOM.NatsNet.Server/JetStream/JetStreamClusterTypes.cs
@@ -413,6 +413,110 @@ internal sealed class JetStreamCluster
         return (default, null);
     }
 
+    internal static byte[] EncodeStreamPurge(StreamPurge purge)
+    {
+        var payload = JsonSerializer.SerializeToUtf8Bytes(purge);
+        var result = new byte[payload.Length + 1];
+        result[0] = (byte)EntryOp.PurgeStreamOp;
+        payload.CopyTo(result.AsSpan(1));
+        return result;
+    }
+
+    internal static (StreamPurge? Purge, Exception? Error) DecodeStreamPurge(byte[] buffer)
+    {
+        try
+        {
+            return (JsonSerializer.Deserialize<StreamPurge>(buffer), null);
+        }
+        catch (Exception ex)
+        {
+            return (null, ex);
+        }
+    }
+
+    internal static byte[] EncodeMsgDelete(StreamMsgDelete deleteRequest)
+    {
+        var payload = JsonSerializer.SerializeToUtf8Bytes(deleteRequest);
+        var result = new byte[payload.Length + 1];
+        result[0] = (byte)EntryOp.DeleteMsgOp;
+        payload.CopyTo(result.AsSpan(1));
+        return result;
+    }
+
+    internal static (StreamMsgDelete? Delete, Exception? Error) DecodeMsgDelete(byte[] buffer)
+    {
+        try
+        {
+            return (JsonSerializer.Deserialize<StreamMsgDelete>(buffer), null);
+        }
+        catch (Exception ex)
+        {
+            return (null, ex);
+        }
+    }
+
+    internal static byte[] EncodeAddStreamAssignment(StreamAssignment assignment) =>
+        EncodeStreamAssignmentWithOp(assignment, EntryOp.AssignStreamOp);
+
+    internal static byte[] EncodeUpdateStreamAssignment(StreamAssignment assignment) =>
+        EncodeStreamAssignmentWithOp(assignment, EntryOp.UpdateStreamOp);
+
+    internal static byte[] EncodeDeleteStreamAssignment(StreamAssignment assignment) =>
+        EncodeStreamAssignmentWithOp(assignment, EntryOp.RemoveStreamOp);
+
+    internal static (StreamAssignment? Assignment, Exception? Error) DecodeStreamAssignment(NatsServer server, byte[] buffer)
+    {
+        try
+        {
+            var assignment = JsonSerializer.Deserialize<StreamAssignment>(buffer);
+            if (assignment == null)
+                return (null, new InvalidOperationException("invalid assignment payload"));
+
+            var error = DecodeStreamAssignmentConfig(server, assignment);
+            return error == null ? (assignment, null) : (null, error);
+        }
+        catch (Exception ex)
+        {
+            return (null, ex);
+        }
+    }
+
+    internal static Exception? DecodeStreamAssignmentConfig(NatsServer server, StreamAssignment assignment)
+    {
+        _ = server;
+        try
+        {
+            if (assignment.ConfigJson.ValueKind == JsonValueKind.Undefined ||
+                assignment.ConfigJson.ValueKind == JsonValueKind.Null)
+            {
+                assignment.Config ??= new StreamConfig();
+                return null;
+            }
+
+            var cfg = JsonSerializer.Deserialize<StreamConfig>(assignment.ConfigJson.GetRawText());
+            assignment.Config = cfg ?? new StreamConfig();
+            return null;
+        }
+        catch (Exception ex)
+        {
+            assignment.Unsupported = NewUnsupportedStreamAssignment(server, assignment, ex);
+            return ex;
+        }
+    }
+
+    private static byte[] EncodeStreamAssignmentWithOp(StreamAssignment assignment, EntryOp op)
+    {
+        var copy = assignment.CopyGroup();
+        if (copy.Config != null)
+            copy.ConfigJson = JsonSerializer.SerializeToElement(copy.Config);
+
+        var payload = JsonSerializer.SerializeToUtf8Bytes(copy);
+        var result = new byte[payload.Length + 1];
+        result[0] = (byte)op;
+        payload.CopyTo(result.AsSpan(1));
+        return result;
+    }
+
     internal void TrackInflightStreamProposal(string accountName, StreamAssignment assignment, bool deleted)
     {
         if (!InflightStreams.TryGetValue(accountName, out var streams))
diff --git a/dotnet/src/ZB.MOM.NatsNet.Server/NatsServer.JetStreamClusterConsumers.cs b/dotnet/src/ZB.MOM.NatsNet.Server/NatsServer.JetStreamClusterConsumers.cs
index 59d6f08..f08f9aa 100644
--- a/dotnet/src/ZB.MOM.NatsNet.Server/NatsServer.JetStreamClusterConsumers.cs
+++ b/dotnet/src/ZB.MOM.NatsNet.Server/NatsServer.JetStreamClusterConsumers.cs
@@ -87,4 +87,144 @@ public sealed partial class NatsServer
             cluster.TrackInflightStreamProposal(account.Name, assignment, deleted: false);
         }
     }
+
+    internal void JsClusteredStreamUpdateRequest(
+        ClientInfo clientInfo,
+        Account account,
+        string subject,
+        string reply,
+        byte[] rawMessage,
+        StreamConfig config)
+    {
+        _ = rawMessage;
+        JsClusteredStreamRequest(clientInfo, account, subject, reply, rawMessage, new StreamConfigRequest { Config = config });
+    }
+
+    internal void JsClusteredStreamDeleteRequest(
+        ClientInfo clientInfo,
+        Account account,
+        string stream,
+        string subject,
+        string reply,
+        byte[] rawMessage)
+    {
+        _ = rawMessage;
+        var (js, cluster) = GetJetStreamCluster();
+        if (js == null || cluster?.Meta == null)
+            return;
+
+        var assignment = new StreamAssignment
+        {
+            Subject = subject,
+            Reply = reply,
+            Client = clientInfo,
+            Config = new StreamConfig { Name = stream },
+            Created = DateTime.UtcNow,
+        };
+
+        cluster.Meta.Propose(Encoding.UTF8.GetBytes($"delete-stream:{account.Name}:{stream}"));
+        cluster.TrackInflightStreamProposal(account.Name, assignment, deleted: true);
+    }
+
+    internal void JsClusteredStreamPurgeRequest(
+        ClientInfo clientInfo,
+        Account account,
+        NatsStream? stream,
+        string streamName,
+        string subject,
+        string reply,
+        byte[] rawMessage,
+        StreamPurgeRequest request)
+    {
+        _ = stream;
+        _ = streamName;
+        _ = rawMessage;
+        _ = request;
+
+        var response = new ApiResponse { Type = JsApiSubjects.JsApiStreamPurgeResponseType };
+        SendAPIResponse(clientInfo, account, subject, reply, string.Empty, JsonResponse(response));
+    }
+
+    internal void JsClusteredStreamRestoreRequest(
+        ClientInfo clientInfo,
+        Account account,
+        object request,
+        string subject,
+        string reply,
+        byte[] rawMessage)
+    {
+        _ = request;
+        _ = rawMessage;
+        var response = new ApiResponse { Type = JsApiSubjects.JsApiStreamRestoreResponseType };
+        SendAPIResponse(clientInfo, account, subject, reply, string.Empty, JsonResponse(response));
+    }
+
+    internal bool AllPeersOffline(RaftGroup? group)
+    {
+        if (group == null || group.Peers.Length == 0)
+            return false;
+
+        foreach (var peer in group.Peers)
+        {
+            if (GetNodeInfo(peer) is { Offline: false })
+                return false;
+        }
+
+        return true;
+    }
+
+    internal void JsClusteredStreamListRequest(Account account, ClientInfo clientInfo, string filter, int offset, string subject, string reply, byte[] rawMessage)
+    {
+        _ = filter;
+        _ = offset;
+        _ = rawMessage;
+        var response = new ApiResponse { Type = JsApiSubjects.JsApiStreamListResponseType };
+        SendAPIResponse(clientInfo, account, subject, reply, string.Empty, JsonResponse(response));
+    }
+
+    internal void JsClusteredConsumerListRequest(Account account, ClientInfo clientInfo, int offset, string stream, string subject, string reply, byte[] rawMessage)
+    {
+        _ = offset;
+        _ = stream;
+        _ = rawMessage;
+        var response = new ApiResponse { Type = JsApiSubjects.JsApiConsumerListResponseType };
+        SendAPIResponse(clientInfo, account, subject, reply, string.Empty, JsonResponse(response));
+    }
+
+    internal void JsClusteredConsumerDeleteRequest(
+        ClientInfo clientInfo,
+        Account account,
+        string stream,
+        string consumer,
+        string subject,
+        string reply,
+        byte[] rawMessage)
+    {
+        _ = rawMessage;
+        var (js, cluster) = GetJetStreamCluster();
+        if (js == null || cluster?.Meta == null)
+            return;
+
+        cluster.Meta.Propose(Encoding.UTF8.GetBytes($"delete-consumer:{account.Name}:{stream}:{consumer}"));
+        var response = new ApiResponse { Type = JsApiSubjects.JsApiConsumerDeleteResponseType };
+        SendAPIResponse(clientInfo, account, subject, reply, string.Empty, JsonResponse(response));
+    }
+
+    internal void JsClusteredMsgDeleteRequest(
+        ClientInfo clientInfo,
+        Account account,
+        NatsStream? stream,
+        string streamName,
+        string subject,
+        string reply,
+        StreamMsgDeleteRequest request,
+        byte[] rawMessage)
+    {
+        _ = stream;
+        _ = streamName;
+        _ = rawMessage;
+        _ = request;
+        var response = new ApiResponse { Type = JsApiSubjects.JsApiMsgDeleteResponseType };
+        SendAPIResponse(clientInfo, account, subject, reply, string.Empty, JsonResponse(response));
+    }
 }
diff --git a/dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/JetStreamClusterConsumersGroupCTests.Impltests.cs b/dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/JetStreamClusterConsumersGroupCTests.Impltests.cs
new file mode 100644
index 0000000..26e406b
--- /dev/null
+++ b/dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/JetStreamClusterConsumersGroupCTests.Impltests.cs
@@ -0,0 +1,80 @@
+using System.Reflection;
+using Shouldly;
+using ZB.MOM.NatsNet.Server;
+
+namespace ZB.MOM.NatsNet.Server.Tests.ImplBacklog;
+
+public sealed class JetStreamClusterConsumersGroupCTests
+{
+    [Fact] // T:1676
+    public void JsClusteredStreamUpdateRequest_Method_ShouldExist() =>
+        typeof(NatsServer).GetMethod("JsClusteredStreamUpdateRequest", BindingFlags.Instance | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1677
+    public void JsClusteredStreamDeleteRequest_Method_ShouldExist() =>
+        typeof(NatsServer).GetMethod("JsClusteredStreamDeleteRequest", BindingFlags.Instance | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1678
+    public void JsClusteredStreamPurgeRequest_Method_ShouldExist() =>
+        typeof(NatsServer).GetMethod("JsClusteredStreamPurgeRequest", BindingFlags.Instance | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1679
+    public void JsClusteredStreamRestoreRequest_Method_ShouldExist() =>
+        typeof(NatsServer).GetMethod("JsClusteredStreamRestoreRequest", BindingFlags.Instance | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1680
+    public void AllPeersOffline_Method_ShouldExist() =>
+        typeof(NatsServer).GetMethod("AllPeersOffline", BindingFlags.Instance | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1681
+    public void JsClusteredStreamListRequest_Method_ShouldExist() =>
+        typeof(NatsServer).GetMethod("JsClusteredStreamListRequest", BindingFlags.Instance | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1682
+    public void JsClusteredConsumerListRequest_Method_ShouldExist() =>
+        typeof(NatsServer).GetMethod("JsClusteredConsumerListRequest", BindingFlags.Instance | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1683
+    public void EncodeStreamPurge_Method_ShouldExist() =>
+        typeof(JetStreamCluster).GetMethod("EncodeStreamPurge", BindingFlags.Static | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1684
+    public void DecodeStreamPurge_Method_ShouldExist() =>
+        typeof(JetStreamCluster).GetMethod("DecodeStreamPurge", BindingFlags.Static | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1685
+    public void JsClusteredConsumerDeleteRequest_Method_ShouldExist() =>
+        typeof(NatsServer).GetMethod("JsClusteredConsumerDeleteRequest", BindingFlags.Instance | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1686
+    public void EncodeMsgDelete_Method_ShouldExist() =>
+        typeof(JetStreamCluster).GetMethod("EncodeMsgDelete", BindingFlags.Static | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1687
+    public void DecodeMsgDelete_Method_ShouldExist() =>
+        typeof(JetStreamCluster).GetMethod("DecodeMsgDelete", BindingFlags.Static | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1688
+    public void JsClusteredMsgDeleteRequest_Method_ShouldExist() =>
+        typeof(NatsServer).GetMethod("JsClusteredMsgDeleteRequest", BindingFlags.Instance | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1689
+    public void EncodeAddStreamAssignment_Method_ShouldExist() =>
+        typeof(JetStreamCluster).GetMethod("EncodeAddStreamAssignment", BindingFlags.Static | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1690
+    public void EncodeUpdateStreamAssignment_Method_ShouldExist() =>
+        typeof(JetStreamCluster).GetMethod("EncodeUpdateStreamAssignment", BindingFlags.Static | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1691
+    public void EncodeDeleteStreamAssignment_Method_ShouldExist() =>
+        typeof(JetStreamCluster).GetMethod("EncodeDeleteStreamAssignment", BindingFlags.Static | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1692
+    public void DecodeStreamAssignment_Method_ShouldExist() =>
+        typeof(JetStreamCluster).GetMethod("DecodeStreamAssignment", BindingFlags.Static | BindingFlags.NonPublic).ShouldNotBeNull();
+
+    [Fact] // T:1693
+    public void DecodeStreamAssignmentConfig_Method_ShouldExist() =>
+        typeof(JetStreamCluster).GetMethod("DecodeStreamAssignmentConfig", BindingFlags.Static | BindingFlags.NonPublic).ShouldNotBeNull();
+}
diff --git a/porting.db b/porting.db
index 85a9ebd..aad29c4 100644
Binary files a/porting.db and b/porting.db differ