Enhance agent chat features and update tokenizer model

- Modified `AgentGroupChatPage.razor` to use lambda expressions for button clicks and added a new example button.
- Updated `AgentGroupChatPage.razor.cs` to use `UpsertAssistantMessage` for streaming response and enhanced `UseExample` method to import plugins.
- Improved `AutoSelectNextAgent` logic in `GroupChat.cs` to prevent infinite loops.
- Switched to `InvokeStreamingAsync` in `ChatCompletionGroup.cs` and added output formatting.
- Updated default tokenizer model to `gpt-4o`.

BlazorWithSematicKernel/Pages/AgentGroupChatPage.razor

@@ -37,7 +37,8 @@
         <RadzenStepsItem Text="Build Agent Group" NextText="Start Group Chat">
             <RadzenRow>
                 <RadzenColumn>
-                    <RadzenButton Size=ButtonSize.Small Click="UseExample" Text="Use Art Director Example"></RadzenButton>
+                    <RadzenButton Size=ButtonSize.Small Click="@(() => UseExample())" Text="Use Art Director Example"></RadzenButton>
+                    <RadzenButton Size=ButtonSize.Small Click="@(() => UseExample("agentsExample-researcher.json"))" Text="Use Researcher Example"></RadzenButton>
                 </RadzenColumn>
                 <RadzenColumn>
                     <RadzenTemplateForm TItem="FileUploadData" Data="_fileUploadData" Submit="HandleFile">

BlazorWithSematicKernel/Pages/AgentGroupChatPage.razor.cs

@@ -73,8 +73,7 @@ private void Reset()
     }
     private async void HandleMessage(string message)
     {
-        Console.WriteLine("Message handled");
-        _chatView?.ChatState?.AddAssistantMessage(message);
+        _chatView?.ChatState?.UpsertAssistantMessage(message);
     }
 
     private void HandleAgentProxies(AgentGroupCompletedArgs agentGroupCompleted)
@@ -85,9 +84,15 @@ private void HandleAgentProxies(AgentGroupCompletedArgs agentGroupCompleted)
         _step = 2;
         StateHasChanged();
     }
-    private void UseExample()
+    private void UseExample(string agentsexampleSkJson = "AgentsExample-sk.json")
     {
-        _agentProxies = FileHelper.ExtractFromAssembly<List<AgentProxy>>("AgentsExample-sk.json");
+        _agentProxies = FileHelper.ExtractFromAssembly<List<AgentProxy>>(agentsexampleSkJson);
+        foreach (var agent in _agentProxies.Where(agent => agent.PluginNames.Count > 0))
+        {
+            Console.WriteLine($"Agent {agent.Name} has {agent.PluginNames.Count} Plugins");
+            var pluginNames = agent.PluginNames;
+            agent.Plugins.AddRange(_allKernelPlugins.Where(x => pluginNames.Contains(x.Name)));
+        }
         StateHasChanged();
 
     }

SemanticKernelAgentOrchestration/Group/GroupChat.cs

@@ -147,7 +147,7 @@ private async Task<ChatAgent> SelectNextSpeaker(ChatAgent lastSpeaker,
         }
         else
         {
-            nextSpeaker = await AutoSelectNextAgent(groupConversion, agents, ct);
+            nextSpeaker = await AutoSelectNextAgent(groupConversion, agents.Where(x => x.Name != lastSpeaker.Name), ct);
         }
 
         return nextSpeaker;

SkPluginLibrary/Agents/SkAgents/ChatCompletionGroup.cs

@@ -134,11 +134,15 @@ public async Task RunAsync(string input, IEnumerable<Agent>? terminationAgents =
         // Invoke chat and display messages.
 
         chat.AddChatMessage(new ChatMessageContent(AuthorRole.User, input));
-
 
-        await foreach (var content in chat.InvokeAsync())
+        var currentAgent = "";
+        await foreach (var content in chat.InvokeStreamingAsync())
         {
-            WriteLine($"**{content.Role} - {content.AuthorName ?? "*"}:** '{content.Content}'");
+            var isCurrent = content.AuthorName == currentAgent;
+            var output = isCurrent ? content.Content : $"**{content.Role} - {content.AuthorName ?? "*"}:** '{content.Content}'";
+            currentAgent = content.AuthorName ?? "";
+            if (string.IsNullOrEmpty(output)) continue;
+            WriteLine(output);
         }
 
         WriteLine($"_IS COMPLETE:_ {chat.IsComplete}");

SkPluginLibrary/CoreKernelService.cs

@@ -96,7 +96,6 @@ public static Kernel CreateKernel(AIModel aiModel = AIModel.Gpt4OMini)
 			});
 		});
 		var providor = aiModel.GetModelProvidors().FirstOrDefault();
-		Console.WriteLine($"AI: {providor}");
 		if (providor.Contains("OpenAI"))
 			kernelBuilder.AddAIChatCompletion(aiModel);
 		if (providor == "GoogleAI")

SkPluginLibrary/Models/Helpers/StringHelpers.cs

@@ -6,14 +6,15 @@ namespace SkPluginLibrary.Models.Helpers
     public static class StringHelpers
     {
         private static Encoding? _tokenizer;
+
         static StringHelpers()
         {
-            _tokenizer = Encoding.ForModel("gpt-3.5-turbo");
+            _tokenizer = Encoding.ForModel("gpt-4o");
         }
         public static List<TokenString> EncodeDecodeWithSpaces(string? input)
         {
             if (input == null) return new List<TokenString>();
-            _tokenizer ??= Encoding.ForModel("gpt-3.5-turbo");
+            _tokenizer ??= Encoding.ForModel("gpt-4o");
             //encode string and keep spaces
             var encodedValues = new List<int>();
             var words = input.Split(' ');
@@ -45,9 +46,10 @@ public static List<TokenString> EncodeDecodeWithSpaces(string? input)
 
         public static int GetTokens(string text)
         {
-            _tokenizer ??= Encoding.ForModel("gpt-3.5-turbo");
+            _tokenizer ??= Encoding.ForModel("gpt-4o");
             return _tokenizer.CountTokens(text);
         }
+
 
         public static string ExtractBase64FromDataUrl(this string dataUrl)
         {