diff --git a/docs/llm/prompt.md b/docs/llm/prompt.md
index da1ae5f2..af101646 100644
--- a/docs/llm/prompt.md
+++ b/docs/llm/prompt.md
@@ -1,3 +1,3 @@
 # Prompt Engineering
 
-LLM uses prompt as input, and the model produces different outputs according to the input.
\ No newline at end of file
+LLM uses prompt as input, and the model produces different outputs according to the input.
diff --git a/docs/llm/template.md b/docs/llm/template.md
index 35260c44..f0c197b1 100644
--- a/docs/llm/template.md
+++ b/docs/llm/template.md
@@ -1,3 +1,9 @@
 # Template
 
-We can define the prompt as a template, and the template can be changed according to variables, so that a instruction file can be used to generate a dynamic prompt.
\ No newline at end of file
+We can define the prompt as a template, and the template can be changed according to variables, so that a instruction file can be used to generate a dynamic prompt.
+`BotSharp` uses [liquid](https://shopify.github.io/liquid/) templates to support various complex dynamic prompt engineering.
+
+`ITemplateRender`
+```csharp
+bool Render(Agent agent, Dictionary<string, object> dict)
+```
\ No newline at end of file
diff --git a/src/Infrastructure/BotSharp.Abstraction/Agents/IAgentRouting.cs b/src/Infrastructure/BotSharp.Abstraction/Agents/IAgentRouting.cs
index 8b0769a7..4df491db 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Agents/IAgentRouting.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Agents/IAgentRouting.cs
@@ -4,4 +4,5 @@ public interface IAgentRouting
 {
     Task<Agent> LoadRouter();
     Task<Agent> LoadCurrentAgent();
+    RoutingRecord[] GetRoutingRecords();
 }
diff --git a/src/Infrastructure/BotSharp.Abstraction/Agents/Models/RoutingTable.cs b/src/Infrastructure/BotSharp.Abstraction/Agents/Models/RoutingRecord.cs
similarity index 57%
rename from src/Infrastructure/BotSharp.Abstraction/Agents/Models/RoutingTable.cs
rename to src/Infrastructure/BotSharp.Abstraction/Agents/Models/RoutingRecord.cs
index 2feedcf8..8f83c74b 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Agents/Models/RoutingTable.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Agents/Models/RoutingRecord.cs
@@ -2,19 +2,25 @@ using System.Text.Json.Serialization;
 
 namespace BotSharp.Abstraction.Agents.Models;
 
-public class RoutingTable
+public class RoutingRecord
 {
     [JsonPropertyName("agent_id")]
     public string AgentId { get; set; }
 
     [JsonPropertyName("name")]
-    public string AgentName { get; set; }
+    public string Name { get; set; }
+
+    [JsonPropertyName("description")]
+    public string Description { get; set; }
 
     [JsonPropertyName("required")]
     public List<string> RequiredFields { get; set; }
 
+    [JsonPropertyName("redirect_to")]
+    public string RedirectTo { get; set; }
+
     public override string ToString()
     {
-        return AgentName;
+        return Name;
     }
 }
diff --git a/src/Infrastructure/BotSharp.Abstraction/Agents/Settings/AgentSettings.cs b/src/Infrastructure/BotSharp.Abstraction/Agents/Settings/AgentSettings.cs
index dfc10822..84ff0274 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Agents/Settings/AgentSettings.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Agents/Settings/AgentSettings.cs
@@ -8,4 +8,5 @@ public class AgentSettings
     public string RouterId { get; set; }
     public string DataDir { get; set; }
     public string TemplateFormat { get; set; }
+    public int MaxRecursiveDepth { get; set; } = 3;
 }
diff --git a/src/Infrastructure/BotSharp.Abstraction/BotSharp.Abstraction.csproj b/src/Infrastructure/BotSharp.Abstraction/BotSharp.Abstraction.csproj
index 48aa9074..802652e9 100644
--- a/src/Infrastructure/BotSharp.Abstraction/BotSharp.Abstraction.csproj
+++ b/src/Infrastructure/BotSharp.Abstraction/BotSharp.Abstraction.csproj
@@ -4,7 +4,7 @@
     <TargetFramework>netstandard2.1</TargetFramework>
     <Nullable>enable</Nullable>
 	  <LangVersion>10.0</LangVersion>
-    <VersionPrefix>0.9.0</VersionPrefix>
+    <VersionPrefix>0.9.4</VersionPrefix>
     <PackageIcon>Icon.png</PackageIcon>
   </PropertyGroup>
 
diff --git a/src/Infrastructure/BotSharp.Abstraction/Functions/Models/FunctionExecutionValidationResult.cs b/src/Infrastructure/BotSharp.Abstraction/Functions/Models/FunctionExecutionValidationResult.cs
deleted file mode 100644
index 423e6563..00000000
--- a/src/Infrastructure/BotSharp.Abstraction/Functions/Models/FunctionExecutionValidationResult.cs
+++ /dev/null
@@ -1,24 +0,0 @@
-using System.Text.Json.Serialization;
-
-namespace BotSharp.Abstraction.Functions.Models;
-
-public class FunctionExecutionValidationResult
-{
-    public FunctionExecutionValidationResult()
-    {
-
-    }
-
-    public FunctionExecutionValidationResult(string validationStatus, string? validationMessage = null)
-    {
-        ValidationStatus = validationStatus;
-        ValidationMessage = validationMessage;
-    }
-
-    [JsonPropertyName("validation_status")]
-    public string ValidationStatus { get; set; }
-
-    [JsonPropertyName("validation_message")]
-    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
-    public string ValidationMessage { get; set; }
-}
diff --git a/src/Infrastructure/BotSharp.Abstraction/Templating/ITemplateRender.cs b/src/Infrastructure/BotSharp.Abstraction/Templating/ITemplateRender.cs
new file mode 100644
index 00000000..61ba9ff7
--- /dev/null
+++ b/src/Infrastructure/BotSharp.Abstraction/Templating/ITemplateRender.cs
@@ -0,0 +1,6 @@
+namespace BotSharp.Abstraction.Templating;
+
+public interface ITemplateRender
+{
+    bool Render(Agent agent, Dictionary<string, object> dict);
+}
diff --git a/src/Infrastructure/BotSharp.Core/Agents/Services/AgentHookBase.cs b/src/Infrastructure/BotSharp.Core/Agents/Services/AgentHookBase.cs
index f1b71eb8..eaf28792 100644
--- a/src/Infrastructure/BotSharp.Core/Agents/Services/AgentHookBase.cs
+++ b/src/Infrastructure/BotSharp.Core/Agents/Services/AgentHookBase.cs
@@ -1,5 +1,4 @@
 using BotSharp.Abstraction.Agents.Models;
-using Fluid;
 
 namespace BotSharp.Core.Agents.Services;
 
@@ -7,13 +6,14 @@ public abstract class AgentHookBase : IAgentHook
 {
     protected Agent _agent;
     public Agent Agent => _agent;
-    private static readonly FluidParser _parser = new FluidParser();
     
-    private readonly IServiceProvider _services;
+    protected readonly IServiceProvider _services;
+    protected readonly AgentSettings _settings;
 
-    public AgentHookBase(IServiceProvider services)
+    public AgentHookBase(IServiceProvider services, AgentSettings settings)
     {
         _services = services;
+        _settings = settings;
     }
 
     public void SetAget(Agent agent)
@@ -28,27 +28,7 @@ public abstract class AgentHookBase : IAgentHook
 
     public virtual bool OnInstructionLoaded(string template, Dictionary<string, object> dict)
     {
-        if (_parser.TryParse(template, out var t, out var error))
-        {
-            PopulateStateTokens(dict);
-            var context = new TemplateContext(dict);
-            _agent.Instruction = t.Render(context);
-            return true;
-        }
-        else
-        {
-            return false;
-        }
-    }
-
-    private void PopulateStateTokens(Dictionary<string, object> dict)
-    {
-        var stateService = _services.GetRequiredService<IConversationStateService>();
-        var state = stateService.Load();
-        foreach (var t in state)
-        {
-            dict[t.Key] = t.Value;
-        }
+        return true;
     }
 
     public virtual bool OnFunctionsLoaded(ref string functions)
diff --git a/src/Infrastructure/BotSharp.Core/Agents/Services/AgentRouter.cs b/src/Infrastructure/BotSharp.Core/Agents/Services/AgentRouter.cs
index f14ed93c..0aed1531 100644
--- a/src/Infrastructure/BotSharp.Core/Agents/Services/AgentRouter.cs
+++ b/src/Infrastructure/BotSharp.Core/Agents/Services/AgentRouter.cs
@@ -1,5 +1,5 @@
-using BotSharp.Abstraction.Agents;
 using BotSharp.Abstraction.Agents.Models;
+using System.IO;
 
 namespace BotSharp.Core.Agents.Services;
 
@@ -42,4 +42,12 @@ public class AgentRouter : IAgentRouting
 
         return agent;
     }
+
+    public RoutingRecord[] GetRoutingRecords()
+    {
+        var agentSettings = _services.GetRequiredService<AgentSettings>();
+        var dbSettings = _services.GetRequiredService<MyDatabaseSettings>();
+        var filePath = Path.Combine(dbSettings.FileRepository, agentSettings.DataDir, agentSettings.RouterId, "route.json");
+        return JsonSerializer.Deserialize<RoutingRecord[]>(File.ReadAllText(filePath));
+    }
 }
diff --git a/src/Infrastructure/BotSharp.Core/Agents/Services/AgentService.LoadAgent.cs b/src/Infrastructure/BotSharp.Core/Agents/Services/AgentService.LoadAgent.cs
index f3b91e3e..ec89334f 100644
--- a/src/Infrastructure/BotSharp.Core/Agents/Services/AgentService.LoadAgent.cs
+++ b/src/Infrastructure/BotSharp.Core/Agents/Services/AgentService.LoadAgent.cs
@@ -1,4 +1,5 @@
 using BotSharp.Abstraction.Agents.Models;
+using BotSharp.Core.Templating;
 
 namespace BotSharp.Core.Agents.Services;
 
@@ -15,6 +16,8 @@ public partial class AgentService
         }
 
         var agent = await GetAgent(id);
+        var templateDict = new Dictionary<string, object>();
+        PopulateState(templateDict);
 
         // After agent is loaded
         foreach (var hook in hooks)
@@ -23,7 +26,7 @@ public partial class AgentService
 
             if (!string.IsNullOrEmpty(agent.Instruction))
             {
-                hook.OnInstructionLoaded(agent.Instruction, new Dictionary<string, object>());
+                hook.OnInstructionLoaded(agent.Instruction, templateDict);
             }
 
             if (!string.IsNullOrEmpty(agent.Functions))
@@ -41,8 +44,22 @@ public partial class AgentService
             hook.OnAgentLoaded(agent);
         }
 
+        // render liquid template
+        var render = _services.GetRequiredService<TemplateRender>();
+        render.Render(agent, templateDict);
+
         _logger.LogInformation($"Loaded agent {agent}.");
 
         return agent;
     }
+
+    private void PopulateState(Dictionary<string, object> dict)
+    {
+        var stateService = _services.GetRequiredService<IConversationStateService>();
+        var state = stateService.Load();
+        foreach (var t in state)
+        {
+            dict[t.Key] = t.Value;
+        }
+    }
 }
diff --git a/src/Infrastructure/BotSharp.Core/BotSharp.Core.csproj b/src/Infrastructure/BotSharp.Core/BotSharp.Core.csproj
index c6c51419..235ba733 100644
--- a/src/Infrastructure/BotSharp.Core/BotSharp.Core.csproj
+++ b/src/Infrastructure/BotSharp.Core/BotSharp.Core.csproj
@@ -4,7 +4,7 @@
     <TargetFramework>netstandard2.1</TargetFramework>
     <LangVersion>10.0</LangVersion>
     <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
-    <VersionPrefix>0.9.0</VersionPrefix>
+    <VersionPrefix>0.9.4</VersionPrefix>
   </PropertyGroup>
   
   <PropertyGroup Label="Globals">
diff --git a/src/Infrastructure/BotSharp.Core/BotSharpServiceCollectionExtensions.cs b/src/Infrastructure/BotSharp.Core/BotSharpServiceCollectionExtensions.cs
index 95e73f6c..376aa7dc 100644
--- a/src/Infrastructure/BotSharp.Core/BotSharpServiceCollectionExtensions.cs
+++ b/src/Infrastructure/BotSharp.Core/BotSharpServiceCollectionExtensions.cs
@@ -1,6 +1,8 @@
 using BotSharp.Abstraction.Functions;
 using BotSharp.Abstraction.Repositories;
 using BotSharp.Core.Functions;
+using BotSharp.Core.Hooks;
+using BotSharp.Core.Templating;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.Extensions.Configuration;
 using DatabaseSettings = BotSharp.Abstraction.Repositories.DatabaseSettings;
@@ -37,10 +39,18 @@ public static class BotSharpServiceCollectionExtensions
 
         RegisterPlugins(services, config);
 
+        // Register template render
+        services.AddSingleton<TemplateRender>();
+
+        // Register router
         services.AddScoped<IAgentRouting, AgentRouter>();
 
+        // Register function callback
         services.AddScoped<IFunctionCallback, RouteToAgentFn>();
 
+        // Register Hooks
+        services.AddScoped<IAgentHook, AgentHook>();
+
         return services;
     }
 
diff --git a/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.CallFunctions.cs b/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.CallFunctions.cs
index b02f3d03..66f0a25d 100644
--- a/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.CallFunctions.cs
+++ b/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.CallFunctions.cs
@@ -29,9 +29,17 @@ public partial class ConversationService
                 await hook.OnFunctionExecuting(msg);
             }
 
-            // Execute function
-            await fn.Execute(msg);
-
+            try
+            {
+                // Execute function
+                await fn.Execute(msg);
+            }
+            catch (Exception ex)
+            {
+                msg.ExecutionResult = ex.Message;
+                _logger.LogError(msg.ExecutionResult);
+            }
+            
             // After functions have been executed
             foreach (var hook in hooks)
             {
diff --git a/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.GetChatCompletionsAsyncRecursively.cs b/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.GetChatCompletionsAsyncRecursively.cs
index d4f058f7..40856809 100644
--- a/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.GetChatCompletionsAsyncRecursively.cs
+++ b/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.GetChatCompletionsAsyncRecursively.cs
@@ -7,13 +7,13 @@ namespace BotSharp.Core.Conversations.Services;
 
 public partial class ConversationService
 {
-    const int maxRecursiveDepth = 3;
     int currentRecursiveDepth = 0;
 
     private async Task<bool> GetChatCompletionsAsyncRecursively(IChatCompletion chatCompletion,
         string conversationId,
         Agent agent, 
         List<RoleDialogModel> wholeDialogs,
+        int maxRecursiveDepth,
         Func<RoleDialogModel, Task> onMessageReceived,
         Func<RoleDialogModel, Task> onFunctionExecuting,
         Func<RoleDialogModel, Task> onFunctionExecuted)
@@ -83,6 +83,7 @@ public partial class ConversationService
                 conversationId, 
                 agent, 
                 wholeDialogs, 
+                maxRecursiveDepth,
                 onMessageReceived, 
                 onFunctionExecuting,
                 onFunctionExecuted);
diff --git a/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs b/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs
index 45ede9dc..8d53971a 100644
--- a/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs
+++ b/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs
@@ -65,11 +65,14 @@ public partial class ConversationService
             await hook.BeforeCompletion();
         }
 
+        var agentSettings = _services.GetRequiredService<AgentSettings>();
+
         var chatCompletion = GetChatCompletion();
         var result = await GetChatCompletionsAsyncRecursively(chatCompletion,
             conversationId,
             agent,
             wholeDialogs,
+            agentSettings.MaxRecursiveDepth,
             onMessageReceived,
             onFunctionExecuting,
             onFunctionExecuted);
diff --git a/src/Infrastructure/BotSharp.Core/Functions/RouteToAgentFn.cs b/src/Infrastructure/BotSharp.Core/Functions/RouteToAgentFn.cs
index 35b2d7a8..f169d5c9 100644
--- a/src/Infrastructure/BotSharp.Core/Functions/RouteToAgentFn.cs
+++ b/src/Infrastructure/BotSharp.Core/Functions/RouteToAgentFn.cs
@@ -29,7 +29,12 @@ public class RouteToAgentFn : IFunctionCallback
         }
         else
         {
-            if (!HasMissingRequiredField(message, out var agentId))
+            var missingfield = HasMissingRequiredField(message, out var agentId);
+            if (missingfield && message.CurrentAgentId != agentId)
+            {
+                message.CurrentAgentId = agentId;
+            }
+            else
             {
                 message.CurrentAgentId = agentId;
                 message.ExecutionResult = $"Routed to {args.AgentName}";
@@ -46,23 +51,23 @@ public class RouteToAgentFn : IFunctionCallback
     private bool HasMissingRequiredField(RoleDialogModel message, out string agentId)
     {
         var args = JsonSerializer.Deserialize<RoutingArgs>(message.FunctionArgs);
+        var router = _services.GetRequiredService<IAgentRouting>();
+        var records = router.GetRoutingRecords();
+        var routingRule = records.FirstOrDefault(x => x.Name.ToLower() == args.AgentName.ToLower());
 
-        var routes = GetRoutingTable();
-        var agent = routes.FirstOrDefault(x => x.AgentName.ToLower() == args.AgentName.ToLower());
-
-        if (agent == null)
+        if (routingRule == null)
         {
             agentId = message.CurrentAgentId;
             message.ExecutionResult = $"Can't find agent {args.AgentName}";
             return true;
         }
 
-        agentId = agent.AgentId;
+        agentId = routingRule.AgentId;
 
         // Check required fields
         var jo = JsonSerializer.Deserialize<object>(message.FunctionArgs);
         bool hasMissingField = false;
-        foreach (var field in agent.RequiredFields)
+        foreach (var field in routingRule.RequiredFields)
         {
             if (jo is JsonElement root)
             {
@@ -72,17 +77,21 @@ public class RouteToAgentFn : IFunctionCallback
                     hasMissingField = true;
                     break;
                 }
+                else if (root.EnumerateObject().Any(x => x.Name == field) && 
+                    string.IsNullOrEmpty(root.EnumerateObject().FirstOrDefault(x => x.Name == field).Value.ToString()))
+                {
+                    message.ExecutionResult = $"missing {field}.";
+                    hasMissingField = true;
+                    break;
+                }
             }
         }
 
+        if (hasMissingField && !string.IsNullOrEmpty(routingRule.RedirectTo))
+        {
+            agentId = routingRule.RedirectTo;
+        }
+
         return hasMissingField;
     }
-
-    private RoutingTable[] GetRoutingTable()
-    {
-        var agentSettings = _services.GetRequiredService<AgentSettings>();
-        var dbSettings = _services.GetRequiredService<MyDatabaseSettings>();
-        var filePath = Path.Combine(dbSettings.FileRepository, agentSettings.DataDir, agentSettings.RouterId, "route.json");
-        return JsonSerializer.Deserialize<RoutingTable[]>(File.ReadAllText(filePath));
-    }
 }
diff --git a/src/Infrastructure/BotSharp.Core/Hooks/AgentHook.cs b/src/Infrastructure/BotSharp.Core/Hooks/AgentHook.cs
new file mode 100644
index 00000000..e030a904
--- /dev/null
+++ b/src/Infrastructure/BotSharp.Core/Hooks/AgentHook.cs
@@ -0,0 +1,16 @@
+namespace BotSharp.Core.Hooks;
+
+public class AgentHook : AgentHookBase
+{
+    public AgentHook(IServiceProvider services, AgentSettings settings)
+        : base(services, settings)
+    {
+    }
+
+    public override bool OnInstructionLoaded(string template, Dictionary<string, object> dict)
+    {
+        var router = _services.GetRequiredService<IAgentRouting>();
+        dict["routing_records"] = router.GetRoutingRecords();
+        return true;
+    }
+}
diff --git a/src/Infrastructure/BotSharp.Core/Templating/TemplateRender.cs b/src/Infrastructure/BotSharp.Core/Templating/TemplateRender.cs
new file mode 100644
index 00000000..ca80356a
--- /dev/null
+++ b/src/Infrastructure/BotSharp.Core/Templating/TemplateRender.cs
@@ -0,0 +1,39 @@
+using BotSharp.Abstraction.Agents.Models;
+using BotSharp.Abstraction.Templating;
+using Fluid;
+using Microsoft.Extensions.Options;
+
+namespace BotSharp.Core.Templating;
+
+public class TemplateRender : ITemplateRender
+{
+    private readonly IServiceProvider _services;
+    private readonly ILogger _logger;
+    private static readonly FluidParser _parser = new FluidParser();
+    private TemplateOptions _options;
+
+    public TemplateRender(IServiceProvider services, ILogger<TemplateRender> logger)
+    {
+        _services = services;
+        _logger = logger;
+        _options = new TemplateOptions();
+        _options.MemberAccessStrategy.MemberNameStrategy = MemberNameStrategies.CamelCase;
+        _options.MemberAccessStrategy.Register<RoutingRecord>();
+    }
+
+    public bool Render(Agent agent, Dictionary<string, object> dict)
+    {
+        var template = agent.Instruction;
+        if (_parser.TryParse(template, out var t, out var error))
+        {
+            var context = new TemplateContext(dict, _options);
+            agent.Instruction = t.Render(context);
+            return true;
+        }
+        else
+        {
+
+            return false;
+        }
+    }
+}