diff --git a/src/Infrastructure/BotSharp.Abstraction/Routing/Models/RoutingArgs.cs b/src/Infrastructure/BotSharp.Abstraction/Routing/Models/RoutingArgs.cs
index df2d63132..44d41f319 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Routing/Models/RoutingArgs.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Routing/Models/RoutingArgs.cs
@@ -5,9 +5,6 @@ public class RoutingArgs
     [JsonPropertyName("function")]
     public string Function { get; set; } = "route_to_agent";
 
-    [JsonPropertyName("function_args")]
-    public string? FunctionArgs { get; set; }
-
     /// <summary>
     /// The reason why you select this function or agent
     /// </summary>
diff --git a/src/Infrastructure/BotSharp.Core/Routing/Reasoning/HFReasoner.cs b/src/Infrastructure/BotSharp.Core/Routing/Reasoning/HFReasoner.cs
index 9f1b5fd52..7af5e63e9 100644
--- a/src/Infrastructure/BotSharp.Core/Routing/Reasoning/HFReasoner.cs
+++ b/src/Infrastructure/BotSharp.Core/Routing/Reasoning/HFReasoner.cs
@@ -51,20 +51,8 @@ public async Task<FunctionCallFromLlm> GetNextInstruction(Agent router, string m
             }
         };
         var response = await completion.GetChatCompletions(router, dialogs);
-        var inst = response.Content.JsonContent<FunctionCallFromLlm>();
 
-        if (inst != null)
-        {
-            if (!string.IsNullOrEmpty(response.FunctionName))
-            {
-                inst.Function = response.FunctionName;
-            }
-
-            if (!string.IsNullOrEmpty(response.FunctionArgs))
-            {
-                inst.FunctionArgs = response.FunctionArgs;
-            }
-        }
+        var inst = response.Content.JsonContent<FunctionCallFromLlm>();
 
         // Fix LLM malformed response
         await ReasonerHelper.FixMalformedResponse(_services, inst);
@@ -85,14 +73,7 @@ public async Task<bool> AgentExecuting(Agent router, FunctionCallFromLlm inst, R
 
             // Set user content as Planner's question
             message.FunctionName = inst.Function;
-            if (!string.IsNullOrEmpty(inst.FunctionArgs))
-            {
-                message.FunctionArgs = inst.FunctionArgs;
-            }
-            else
-            {
-                message.FunctionArgs = inst.Arguments == null ? "{}" : JsonSerializer.Serialize(inst.Arguments);
-            }
+            message.FunctionArgs = inst.Arguments == null ? "{}" : JsonSerializer.Serialize(inst.Arguments);
         }
 
         return true;
diff --git a/src/Infrastructure/BotSharp.Core/Routing/Reasoning/InstructExecutor.cs b/src/Infrastructure/BotSharp.Core/Routing/Reasoning/InstructExecutor.cs
index 0c10f75fe..23eee53d2 100644
--- a/src/Infrastructure/BotSharp.Core/Routing/Reasoning/InstructExecutor.cs
+++ b/src/Infrastructure/BotSharp.Core/Routing/Reasoning/InstructExecutor.cs
@@ -31,19 +31,10 @@ await HookEmitter.Emit<IRoutingHook>(_services, async hook => await hook.OnRouti
         }
 
         message.FunctionArgs = JsonSerializer.Serialize(inst);
-        if (!string.IsNullOrEmpty(inst.FunctionArgs))
-        {
-            message.FunctionArgs = inst.FunctionArgs;
-        }
-
         if (!string.IsNullOrEmpty(message.FunctionName))
         {
             var msg = RoleDialogModel.From(message, role: AgentRole.Function);
             await routing.InvokeFunction(message.FunctionName, msg, options: new() { From = InvokeSource.Routing });
-            if (msg.StopCompletion)
-            {
-                message = RoleDialogModel.From(msg, role: AgentRole.Assistant);
-            }
         }
 
         var agentId = routing.Context.GetCurrentAgentId();
@@ -85,8 +76,8 @@ await HookEmitter.Emit<IRoutingHook>(_services, async hook => await hook.OnRouti
         }
 
         var response = dialogs.Last();
+        
         response.Instruction = inst;
-        response.StopCompletion = message.StopCompletion;
 
         return response;
     }
diff --git a/src/Infrastructure/BotSharp.Core/Routing/Reasoning/NaiveReasoner.cs b/src/Infrastructure/BotSharp.Core/Routing/Reasoning/NaiveReasoner.cs
index 5cab06725..39e8be430 100644
--- a/src/Infrastructure/BotSharp.Core/Routing/Reasoning/NaiveReasoner.cs
+++ b/src/Infrastructure/BotSharp.Core/Routing/Reasoning/NaiveReasoner.cs
@@ -57,18 +57,6 @@ public async Task<FunctionCallFromLlm> GetNextInstruction(Agent router, string m
         var response = await completion.GetChatCompletions(router, dialogs);
 
         var inst = (response.FunctionArgs ?? response.Content).JsonContent<FunctionCallFromLlm>();
-        if (inst != null)
-        {
-            if (!string.IsNullOrEmpty(response.FunctionName))
-            {
-                inst.Function = response.FunctionName;
-            }
-
-            if (!string.IsNullOrEmpty(response.FunctionArgs))
-            {
-                inst.FunctionArgs = response.FunctionArgs;
-            }
-        }
 
         // Fix LLM malformed response
         await ReasonerHelper.FixMalformedResponse(_services, inst);
@@ -80,14 +68,7 @@ public Task<bool> AgentExecuting(Agent router, FunctionCallFromLlm inst, RoleDia
     {
         // Set user content as Planner's question
         message.FunctionName = inst.Function;
-        if (!string.IsNullOrEmpty(inst.FunctionArgs))
-        {
-            message.FunctionArgs = inst.FunctionArgs;
-        }
-        else
-        {
-            message.FunctionArgs = inst.Arguments == null ? "{}" : JsonSerializer.Serialize(inst.Arguments);
-        }
+        message.FunctionArgs = inst.Arguments == null ? "{}" : JsonSerializer.Serialize(inst.Arguments);
 
         return Task.FromResult(true);
     }
diff --git a/src/Infrastructure/BotSharp.Core/Routing/Reasoning/OneStepForwardReasoner.cs b/src/Infrastructure/BotSharp.Core/Routing/Reasoning/OneStepForwardReasoner.cs
index 49463238f..3af0614da 100644
--- a/src/Infrastructure/BotSharp.Core/Routing/Reasoning/OneStepForwardReasoner.cs
+++ b/src/Infrastructure/BotSharp.Core/Routing/Reasoning/OneStepForwardReasoner.cs
@@ -67,22 +67,8 @@ public async Task<FunctionCallFromLlm> GetNextInstruction(Agent router, string m
         // eliminating format drift where the LLM completes with finishReason=stop and returns
         // free text or JSON in Content instead of a structured function call.
         var response = await GetChatCompletionsWithScopedState(completion, router, dialogs, "tool_choice", "required");
-        var inst = response.FunctionArgs?.JsonContent<FunctionCallFromLlm>();
-
-        if (inst != null)
-        {
-            if (!string.IsNullOrEmpty(response.FunctionName))
-            {
-                inst.Function = response.FunctionName;
-            }
-
-            if (!string.IsNullOrEmpty(response.FunctionArgs))
-            {
-                inst.FunctionArgs = response.FunctionArgs;
-            }
-        }
-
 
+        var inst = response.FunctionArgs?.JsonContent<FunctionCallFromLlm>();
         _logger.LogInformation("[OneStepForwardReasoner] ConversationId: {ConversationId}, MessageId: {MessageId}, Next instruction: {Instruction}",
             _services.GetRequiredService<IRoutingContext>().ConversationId, messageId, response.FunctionArgs);
 
@@ -96,14 +82,7 @@ public Task<bool> AgentExecuting(Agent router, FunctionCallFromLlm inst, RoleDia
     {
         // Set user content as Planner's question
         message.FunctionName = inst.Function;
-        if (!string.IsNullOrEmpty(inst.FunctionArgs))
-        {
-            message.FunctionArgs = inst.FunctionArgs;
-        }
-        else
-        {
-            message.FunctionArgs = inst.Arguments == null ? "{}" : JsonSerializer.Serialize(inst.Arguments);
-        }
+        message.FunctionArgs = inst.Arguments == null ? "{}" : JsonSerializer.Serialize(inst.Arguments);
 
         return Task.FromResult(true);
     }