fix to string

src/Infrastructure/BotSharp.Abstraction/Models/MessageState.cs

@@ -3,7 +3,7 @@ namespace BotSharp.Abstraction.Models;
 public class MessageState
 {
     public string Key { get; set; }
-    public string Value { get; set; }
+    public object Value { get; set; }
 
     [JsonPropertyName("active_rounds")]
     public int ActiveRounds { get; set; } = -1;
@@ -13,7 +13,7 @@ public class MessageState
         
     }
 
-    public MessageState(string key, string value, int activeRounds = -1)
+    public MessageState(string key, object value, int activeRounds = -1)
     {
         Key = key;
         Value = value;

src/Infrastructure/BotSharp.Abstraction/Utilities/StringExtensions.cs

@@ -108,4 +108,27 @@ public static class StringExtensions
                uint.TryParse(value, out _) ||
                ulong.TryParse(value, out _);
     }
+
+
+    public static string ConvertToString<T>(this T? value, JsonSerializerOptions? jsonOptions = null)
+    {
+        if (value == null)
+        {
+            return string.Empty;
+        }
+
+        if (value is string s)
+        {
+            return s;
+        }
+
+        if (value is JsonElement elem
+            && elem.ValueKind == JsonValueKind.String)
+        {
+            return elem.ToString();
+        }
+
+        var str = JsonSerializer.Serialize(value, jsonOptions);
+        return str;
+    }
 }

src/Infrastructure/BotSharp.Core/Agents/Services/AgentService.LoadAgent.cs

@@ -67,7 +67,7 @@ public partial class AgentService
                 hook.OnSamplesLoaded(agent.Samples);
             }
 
-            if (loadUtility)
+            if (loadUtility && !agent.Utilities.IsNullOrEmpty())
             {
                 hook.OnAgentUtilityLoaded(agent);
             }

src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationStateService.cs

@@ -15,6 +15,7 @@
 ******************************************************************************/
 
 using BotSharp.Abstraction.Conversations.Enums;
+using BotSharp.Abstraction.Options;
 using BotSharp.Abstraction.SideCar;
 
 namespace BotSharp.Core.Conversations.Services;
@@ -69,9 +70,11 @@ public class ConversationStateService : IConversationStateService
             return this;
         }
 
+        var options = _services.GetRequiredService<BotSharpOptions>();
+
         var defaultRound = -1;
         var preValue = string.Empty;
-        var currentValue = value.ToString();
+        var currentValue = value.ConvertToString(options.JsonSerializerOptions);
         var curActive = true;
         StateKeyValue? pair = null;
         StateValue? prevLeafNode = null;

src/Infrastructure/BotSharp.OpenAPI/Controllers/ConversationController.cs

@@ -33,7 +33,7 @@ public class ConversationController : ControllerBase
         var conv = new Conversation
         {
             AgentId = agentId,
-            Channel = channel == default ? ConversationChannel.OpenAPI : channel.Value,
+            Channel = channel == default ? ConversationChannel.OpenAPI : channel.Value.ToString(),
             Tags = config.Tags ?? new(),
             TaskId = config.TaskId
         };