Add user_goal_agent to track user's original task.

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

@@ -5,7 +5,7 @@ namespace BotSharp.Abstraction.Routing;
 public interface IRoutingService
 {
     List<RoleDialogModel> Dialogs { get; }
-    Task<FunctionCallFromLlm> GetNextInstruction(string prompt);
+    Task<FunctionCallFromLlm> GetNextInstruction();
     Task<RoleDialogModel> InvokeAgent(string agentId);
     Task<RoleDialogModel> InstructLoop();
     Task<RoleDialogModel> ExecuteOnce(Agent agent);

src/Infrastructure/BotSharp.Abstraction/Routing/Models/RoutingArgs.cs

@@ -6,13 +6,16 @@ public class RoutingArgs
     public string Function { get; set; } = string.Empty;
 
     [JsonPropertyName("reason")]
-    public string Reason { get; set; } = string.Empty;
+    public string Reason { get; set; } = "the reason why you select this function or agent";
 
     [JsonPropertyName("answer")]
     public string Answer { get; set; } = string.Empty;
 
-    [JsonPropertyName("agent")]
-    public string AgentName { get; set; } = string.Empty;
+    [JsonPropertyName("next_action_agent")]
+    public string AgentName { get; set; } = "agent for next action based on user's latest response";
+
+    [JsonPropertyName("user_goal_agent")]
+    public string OriginalAgent { get; set; } = "agent who can achieve user's original goal";
 
     public override string ToString()
     {

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

@@ -19,6 +19,11 @@ public partial class AgentService
         }
 
         var agent = await GetAgent(id);
+        if (agent == null)
+        {
+            throw new Exception($"Can't load agent by id: {id}");
+        }
+
         var templateDict = new Dictionary<string, object>();
         PopulateState(templateDict);
 

src/Infrastructure/BotSharp.Core/BotSharp.Core.csproj

@@ -63,8 +63,4 @@
     <ProjectReference Include="..\BotSharp.Abstraction\BotSharp.Abstraction.csproj" />
   </ItemGroup>
 
-  <ItemGroup>
-    <Folder Include="Routing\Functions\" />
-  </ItemGroup>
-
 </Project>

src/Infrastructure/BotSharp.Core/Routing/Functions/RouteToAgentFn.cs

@@ -25,8 +25,21 @@ public class RouteToAgentFn : IFunctionCallback
     {
         var args = JsonSerializer.Deserialize<RoutingArgs>(message.FunctionArgs);
 
-        // Push to routing stack
-        _context.Push(message.CurrentAgentId);
+        // Push original task agent
+        if (!string.IsNullOrEmpty(args.OriginalAgent) && args.OriginalAgent.Length < 32)
+        {
+            var db = _services.GetRequiredService<IBotSharpRepository>();
+            var originalAgent = db.Agents.FirstOrDefault(x => x.Name.ToLower() == args.OriginalAgent.ToLower());
+            if (originalAgent != null)
+            {
+                _context.Push(originalAgent.Id);
+            }
+        }
+        else
+        {
+            // Push current agent to routing stack
+            _context.Push(message.CurrentAgentId);
+        }
 
         if (string.IsNullOrEmpty(args.AgentName))
         {

src/Infrastructure/BotSharp.Core/Routing/Handlers/RouteToAgentRoutingHandler.cs

@@ -15,8 +15,9 @@ public class RouteToAgentRoutingHandler : RoutingHandlerBase, IRoutingHandler
 
     public List<NameDesc> Parameters => new List<NameDesc>
     {
-        new NameDesc("agent", "the name of the agent"),
-        new NameDesc("reason", "why route to this agent"),
+        new NameDesc("next_action_agent", "the name of the next action's agent"),
+        new NameDesc("user_goal_agent", "the agent who can achieve user's original goal"),
+        new NameDesc("reason", "the reason why you select this function or agent"),
         new NameDesc("args", "the agent required parameters")
     };
 
@@ -33,10 +34,7 @@ public class RouteToAgentRoutingHandler : RoutingHandlerBase, IRoutingHandler
         var message = new RoleDialogModel(AgentRole.Function, inst.Question)
         {
             FunctionName = inst.Function,
-            FunctionArgs = JsonSerializer.Serialize(new RoutingArgs
-            {
-                AgentName = inst.AgentName
-            }),
+            FunctionArgs = JsonSerializer.Serialize(inst),
             CurrentAgentId = routing.Dialogs.Last().CurrentAgentId
         };
 
@@ -44,7 +42,8 @@ public class RouteToAgentRoutingHandler : RoutingHandlerBase, IRoutingHandler
 
         var context = _services.GetRequiredService<RoutingContext>();
         var result = await routing.InvokeAgent(context.CurrentAgentId);
-        
+        // Keep last message data for debug
+        result.ExecutionData = result.ExecutionData ?? message.ExecutionData;
         return result;
     }
 }

src/Infrastructure/BotSharp.Core/Routing/RoutingService.GetNextInstruction.cs

@@ -7,8 +7,9 @@ namespace BotSharp.Core.Routing;
 
 public partial class RoutingService
 {
-    public async Task<FunctionCallFromLlm> GetNextInstruction(string prompt)
+    public async Task<FunctionCallFromLlm> GetNextInstruction()
     {
+        var prompt = "Which is the next step based on the CONVERSATION? Or you can handle without asking specific agent.";
         var responseFormat = _settings.EnableReasoning ?
             JsonSerializer.Serialize(new FunctionCallFromLlm()) :
             JsonSerializer.Serialize(new RoutingArgs

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

@@ -76,9 +76,7 @@ public partial class RoutingService : IRoutingService
         {
             loopCount++;
 
-            var prompt = _settings.EnableReasoning ? "Tell me the next step?" : "Which agent is suitable to handle user's request based on the CONVERSATION?";
-            prompt += " Or you can handle without asking specific agent.";
-            var inst = await GetNextInstruction(prompt);
+            var inst = await GetNextInstruction();
             inst.Question = inst.Question ?? message;
 
             var handler = handlers.FirstOrDefault(x => x.Name == inst.Function);

src/Plugins/BotSharp.Plugin.KnowledgeBase/MemVecDb/MemVectorDatabase.cs

@@ -81,14 +81,14 @@ public class MemVectorDatabase : IVectorDb
         return simiMatix;
     }
 
-    public int[] CalCosineSimilarityTopK(float[] vec, List<VecRecord> records, int topK = 10, float filterProb = 0.75f)
+    public (int, float)[] CalCosineSimilarityTopK(float[] vec, List<VecRecord> records, int topK = 10, float filterProb = 0.75f)
     {
         var simiMatix = CalCosineSimilarity(vec, records);
 
         topK = Math.Min(topK, records.Count);
         var topIndex = np.argsort(simiMatix)["::-1"][$":{topK}"];
 
-        var resIndex = new List<int>();
+        var resIndex = new List<(int, float)>();
 
         for (int i = 0; i < topK; i++)
         {
@@ -97,7 +97,7 @@ public class MemVectorDatabase : IVectorDb
 
             if (value > filterProb)
             {
-                resIndex.Add(topIndex[i]);
+                resIndex.Add((topIndex[i], value));
             }
         }