OnCallBusyStatus

src/Plugins/BotSharp.Plugin.Twilio/Controllers/TwilioVoiceController.cs

@@ -348,6 +348,10 @@ await HookEmitter.Emit<ITwilioCallStatusHook>(_services, async hook =>
                 await HookEmitter.Emit<ITwilioCallStatusHook>(_services, x => x.OnUserDisconnected(request));
             }
         }
+        else if (request.CallStatus == "busy")
+        {
+            await HookEmitter.Emit<ITwilioCallStatusHook>(_services, x => x.OnCallBusyStatus(request));
+        }
 
         return Ok();
     }

src/Plugins/BotSharp.Plugin.Twilio/Interfaces/ITwilioCallStatusHook.cs

@@ -10,4 +10,13 @@ public interface ITwilioCallStatusHook
     Task OnRecordingCompleted(ConversationalVoiceRequest request);
     Task OnTranscribeCompleted(ConversationalVoiceRequest request);
     Task OnVoicemailStarting(ConversationalVoiceRequest request);
+
+    /// <summary>
+    /// 1. The recipient's phone line is already engaged.
+    /// 2. Some users block unknown or spam calls, which may cause a "busy" status.
+    /// 3. Some carriers explicitly return a busy signal instead of routing the call to voicemail.
+    /// </summary>
+    /// <param name="request"></param>
+    /// <returns></returns>
+    Task OnCallBusyStatus(ConversationalVoiceRequest request);
 }

src/Plugins/BotSharp.Plugin.Twilio/Models/ConversationalVoiceRequest.cs

@@ -39,9 +39,6 @@ public class ConversationalVoiceRequest : VoiceRequest
     [FromForm]
     public int MachineDetectionDuration { get; set; }
 
-    [FromForm]
-    public int Duration { get; set; }
-
     [FromForm]
     public int CallDuration { get; set; }
 

src/Plugins/BotSharp.Plugin.Twilio/OutboundPhoneCallHandler/Functions/OutboundPhoneCallFn.cs

@@ -145,21 +145,25 @@ private async Task ForkConversation(LlmContextIn args,
             Title = args.InitialMessage
         });
 
+        var messageId = Guid.NewGuid().ToString();
         convStorage.Append(newConversationId, new List<RoleDialogModel>
         {
             new RoleDialogModel(AgentRole.User, "Hi")
             {
+                MessageId = messageId,
                 CurrentAgentId = entryAgentId
             },
             new RoleDialogModel(AgentRole.Assistant, args.InitialMessage)
             {
+                MessageId = messageId,
                 CurrentAgentId = entryAgentId
             }
         });
 
         convService.SetConversationId(newConversationId, 
         [
             new MessageState(StateConst.ORIGIN_CONVERSATION_ID, originConversationId),
+            new MessageState("channel", "phone"),
             new MessageState("phone_from", call.From),
             new MessageState("phone_direction", call.Direction),
             new MessageState("phone_number", call.To),