diff --git a/AscNet.GameServer/Commands/Command.cs b/AscNet.GameServer/Commands/Command.cs
index 7dfdaa5..3033475 100644
--- a/AscNet.GameServer/Commands/Command.cs
+++ b/AscNet.GameServer/Commands/Command.cs
@@ -1,6 +1,8 @@
-using System.Reflection;
+using System;
+using System.Reflection;
 using System.Text.RegularExpressions;
 using AscNet.Logging;
+using Newtonsoft.Json;
 
 namespace AscNet.GameServer.Commands
 {
@@ -30,12 +32,17 @@ namespace AscNet.GameServer.Commands
         public string? Validate()
         {
             List<PropertyInfo> argsProperties = GetType().GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance).Where(x => x.GetCustomAttribute(typeof(ArgumentAttribute)) is not null).ToList();
-            if (argsProperties.Count != args.Length)
+            if (argsProperties.Where(x => (((ArgumentAttribute)x.GetCustomAttribute(typeof(ArgumentAttribute))!).Flags & ArgumentFlags.Optional) != ArgumentFlags.Optional).Count() > args.Length)
                 return "Invalid args length!";
 
             foreach (var argProp in argsProperties)
             {
                 ArgumentAttribute attr = (ArgumentAttribute)argProp.GetCustomAttribute(typeof(ArgumentAttribute))!;
+                if (attr.Position + 1 > args.Length && (attr.Flags & ArgumentFlags.Optional) != ArgumentFlags.Optional)
+                    return $"Argument {argProp.Name} is required!";
+                else if (attr.Position + 1 > args.Length)
+                    return null;
+
                 if (!attr.Pattern.IsMatch(args[attr.Position]))
                     return $"Argument {argProp.Name} is invalid!";
 
@@ -53,15 +60,23 @@ namespace AscNet.GameServer.Commands
         public int Position { get; }
         public Regex Pattern { get; }
         public string? Description { get; }
+        public ArgumentFlags Flags { get; }
 
-        public ArgumentAttribute(int position, string pattern, string? description = null)
+        public ArgumentAttribute(int position, string pattern, string? description = null, ArgumentFlags flags = ArgumentFlags.None)
         {
             Position = position;
             Pattern = new(pattern);
             Description = description;
+            Flags = flags;
         }
     }
 
+    public enum ArgumentFlags
+    {
+        None = 0,
+        Optional = 1
+    }
+
     [AttributeUsage(AttributeTargets.Class)]
     public class CommandNameAttribute : Attribute
     {
@@ -91,7 +106,7 @@ namespace AscNet.GameServer.Commands
                 {
                     List<PropertyInfo> argsProperties = cmd.GetType().GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance).Where(x => x.GetCustomAttribute(typeof(ArgumentAttribute)) is not null).ToList();
 
-                    helpText += $"{command} {string.Join(" ", argsProperties.Select(x => $"<{x.Name}>"))}\n{cmd.Help}\n";
+                    helpText += $"{command} {string.Join(" ", argsProperties.Select(x => (((ArgumentAttribute)x.GetCustomAttribute(typeof(ArgumentAttribute))!).Flags & ArgumentFlags.Optional) == ArgumentFlags.Optional ? $"[{x.Name}]" : $"<{x.Name}>"))}\n{cmd.Help}\n";
                     foreach (var argProp in argsProperties)
                     {
                         ArgumentAttribute attr = (ArgumentAttribute)argProp.GetCustomAttribute(typeof(ArgumentAttribute))!;
diff --git a/AscNet.GameServer/Commands/ItemCommand.cs b/AscNet.GameServer/Commands/ItemCommand.cs
new file mode 100644
index 0000000..a1ef14c
--- /dev/null
+++ b/AscNet.GameServer/Commands/ItemCommand.cs
@@ -0,0 +1,66 @@
+using AscNet.Common.MsgPack;
+using AscNet.Common.Util;
+using AscNet.Table.V2.share.item;
+
+namespace AscNet.GameServer.Commands
+{
+    [CommandName("item")]
+    internal class ItemCommand : Command
+    {
+        public ItemCommand(Session session, string[] args, bool validate = true) : base(session, args, validate) { }
+
+        public override string Help => "Command to interact with user's items";
+
+        [Argument(0, @"^add$|^clear$|^reset$", "The operation selected (add, clear, reset)")]
+        string Op { get; set; } = string.Empty;
+
+        [Argument(1, @"^[0-9]+$|^all$", "The target item, value is item id or 'all'", ArgumentFlags.Optional)]
+        string Target { get; set; } = string.Empty;
+
+        [Argument(2, @"^[0-9]+$|^max$", "The target item amount, value is number or 'max' (when using other than max amount will be limited to game's max limit)", ArgumentFlags.Optional)]
+        string Amount { get; set; } = string.Empty;
+
+        public override void Execute()
+        {
+            switch (Op)
+            {
+                case "add":
+                    if (Target == "all")
+                    {
+                        session.inventory.Items = TableReaderV2.Parse<Table.V2.share.item.ItemTable>().Select(x => new Item()
+                        {
+                            Id = x.Id,
+                            Count = x.MaxCount ?? 999_999_999,
+                            RefreshTime = DateTimeOffset.Now.ToUnixTimeSeconds(),
+                            CreateTime = DateTimeOffset.Now.ToUnixTimeSeconds()
+                        }).ToList();
+
+                        NotifyItemDataList notifyItemData = new()
+                        {
+                            ItemDataList = session.inventory.Items
+                        };
+                        session.SendPush(notifyItemData);
+                    }
+                    else
+                    {
+                        if (string.IsNullOrEmpty(Target) || string.IsNullOrEmpty(Amount))
+                        {
+                            throw new ArgumentException("Invalid Target / Amount!");
+                        }
+
+                        if (!TableReaderV2.Parse<ItemTable>().Any(x => x.Id == Miscs.ParseIntOr(Target)))
+                        {
+                            throw new ArgumentException("Invalid Target item id!");
+                        }
+
+                        NotifyItemDataList notifyItemData = new();
+                        notifyItemData.ItemDataList.Add(session.inventory.Do(Miscs.ParseIntOr(Target), Miscs.ParseIntOr(Amount)));
+                        session.SendPush(notifyItemData);
+                    }
+                    break;
+                default:
+                    throw new InvalidOperationException("Invalid operation!");
+            }
+        }
+    }
+}
diff --git a/AscNet.GameServer/Handlers/ChatModule.cs b/AscNet.GameServer/Handlers/ChatModule.cs
index 3aad490..cc18178 100644
--- a/AscNet.GameServer/Handlers/ChatModule.cs
+++ b/AscNet.GameServer/Handlers/ChatModule.cs
@@ -174,9 +174,13 @@ namespace AscNet.GameServer.Handlers
                 {
                     notifyWorldChat.ChatMessages.Add(MakeLuciaMessage(ex.Message));
                 }
-                catch (Exception)
+                catch (Exception ex)
                 {
-                    notifyWorldChat.ChatMessages.Add(MakeLuciaMessage($"Command {cmdStrings.First().Split('/').Last()} failed to execute!"));
+#if DEBUG
+                    notifyWorldChat.ChatMessages.Add(MakeLuciaMessage($"Command {cmdStrings.First().Split('/').Last()} failed to execute!, " + ex.ToString()));
+#else
+                    notifyWorldChat.ChatMessages.Add(MakeLuciaMessage($"Command {cmdStrings.First().Split('/').Last()} failed to execute!, " + ex.Message));
+#endif
                 }
             }