Fixed the issue of obtaining CurrentAgentId using SetState in a Hook.

src/Infrastructure/BotSharp.Abstraction/Routing/IRoutingContext.cs

@@ -10,6 +10,7 @@ public interface IRoutingContext
     string ConversationId { get; }
     string MessageId { get; }
     void SetMessageId(string conversationId, string messageId);
+    void SetMessageAgentId(string agentId);
     bool IsEmpty { get; }
     string IntentName { get; set; }
     int AgentCount { get; }

src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs

@@ -36,6 +36,7 @@ public async Task<bool> SendMessage(string agentId,
         // Enqueue receiving agent first in case it stop completion by OnMessageReceived
         var routing = _services.GetRequiredService<IRoutingService>();
         routing.Context.SetMessageId(_conversationId, message.MessageId);
+        routing.Context.SetMessageAgentId(message.CurrentAgentId);
 
         // Save payload in order to assign the payload before hook is invoked
         if (replyMessage != null && !string.IsNullOrEmpty(replyMessage.Payload))

src/Infrastructure/BotSharp.Core/Routing/RoutingContext.cs

@@ -11,6 +11,7 @@ public class RoutingContext : IRoutingContext
     private string[] _routerAgentIds;
     private string _conversationId;
     private string _messageId;
+    private string _messageAgentId;
     private int _currentRecursionDepth = 0;
     private List<RoleDialogModel> _dialogs = [];
 
@@ -60,7 +61,7 @@ public string EntryAgentId
     {
         get
         {
-            return _stack.LastOrDefault() ?? string.Empty;
+            return _stack.LastOrDefault() ?? _messageAgentId;
         }
     }
 
@@ -70,7 +71,7 @@ public string GetCurrentAgentId()
     {
         if (_stack.Count == 0)
         {
-            return string.Empty;
+            return _messageAgentId;
         }
 
         return _stack.Peek();
@@ -228,6 +229,11 @@ public void SetMessageId(string conversationId, string messageId)
         _messageId = messageId;
     }
 
+    public void SetMessageAgentId(string agentId)
+    {
+        _messageAgentId = agentId;
+    }
+
     public int GetRecursiveCounter()
     {
         return _currentRecursionDepth;