Remove old UI and do lots of cleanup

MCPForUnity/Editor/Dependencies/DependencyManager.cs

@@ -126,7 +126,7 @@ private static void GenerateRecommendations(DependencyCheckResult result, IPlatf
             {
                 if (dep.Name == "Python")
                 {
-                    result.RecommendedActions.Add($"Install Python 3.10+ from: {detector.GetPythonInstallUrl()}");
+                    result.RecommendedActions.Add($"Install Python 3.11+ from: {detector.GetPythonInstallUrl()}");
                 }
                 else if (dep.Name == "UV Package Manager")
                 {

MCPForUnity/Editor/Dependencies/PlatformDetectors/LinuxPlatformDetector.cs

@@ -62,7 +62,7 @@ public override DependencyStatus DetectPython()
                     }
                 }
 
-                status.ErrorMessage = "Python not found. Please install Python 3.10 or later.";
+                status.ErrorMessage = "Python not found. Please install Python 3.11 or later.";
                 status.Details = "Checked common installation paths including system, snap, and user-local locations.";
             }
             catch (Exception ex)
@@ -144,10 +144,10 @@ private bool TryValidatePython(string pythonPath, out string version, out string
                     version = output.Substring(7); // Remove "Python " prefix
                     fullPath = pythonPath;
 
-                    // Validate minimum version (Python 4+ or Python 3.10+)
+                    // Validate minimum version (Python 4+ or Python 3.11+)
                     if (TryParseVersion(version, out var major, out var minor))
                     {
-                        return major > 3 || (major >= 3 && minor >= 10);
+                        return major > 3 || (major >= 3 && minor >= 11);
                     }
                 }
             }

MCPForUnity/Editor/Dependencies/PlatformDetectors/MacOSPlatformDetector.cs

@@ -35,8 +35,7 @@ public override DependencyStatus DetectPython()
                     "/opt/homebrew/bin/python3",
                     "/Library/Frameworks/Python.framework/Versions/3.13/bin/python3",
                     "/Library/Frameworks/Python.framework/Versions/3.12/bin/python3",
-                    "/Library/Frameworks/Python.framework/Versions/3.11/bin/python3",
-                    "/Library/Frameworks/Python.framework/Versions/3.10/bin/python3"
+                    "/Library/Frameworks/Python.framework/Versions/3.11/bin/python3"
                 };
 
                 foreach (var candidate in candidates)
@@ -65,7 +64,7 @@ public override DependencyStatus DetectPython()
                     }
                 }
 
-                status.ErrorMessage = "Python not found. Please install Python 3.10 or later.";
+                status.ErrorMessage = "Python not found. Please install Python 3.11 or later.";
                 status.Details = "Checked common installation paths including Homebrew, Framework, and system locations.";
             }
             catch (Exception ex)
@@ -144,10 +143,10 @@ private bool TryValidatePython(string pythonPath, out string version, out string
                     version = output.Substring(7); // Remove "Python " prefix
                     fullPath = pythonPath;
 
-                    // Validate minimum version (Python 4+ or Python 3.10+)
+                    // Validate minimum version (Python 4+ or Python 3.11+)
                     if (TryParseVersion(version, out var major, out var minor))
                     {
-                        return major > 3 || (major >= 3 && minor >= 10);
+                        return major > 3 || (major >= 3 && minor >= 11);
                     }
                 }
             }

MCPForUnity/Editor/Dependencies/PlatformDetectors/WindowsPlatformDetector.cs

@@ -68,7 +68,7 @@ public override DependencyStatus DetectPython()
                     }
                 }
 
-                status.ErrorMessage = "Python not found. Please install Python 3.10 or later.";
+                status.ErrorMessage = "Python not found. Please install Python 3.11 or later.";
                 status.Details = "Checked common installation paths and PATH environment variable.";
             }
             catch (Exception ex)
@@ -132,10 +132,10 @@ private bool TryValidatePython(string pythonPath, out string version, out string
                     version = output.Substring(7); // Remove "Python " prefix
                     fullPath = pythonPath;
 
-                    // Validate minimum version (Python 4+ or Python 3.10+)
+                    // Validate minimum version (Python 4+ or Python 3.11+)
                     if (TryParseVersion(version, out var major, out var minor))
                     {
-                        return major > 3 || (major >= 3 && minor >= 10);
+                        return major > 3 || (major >= 3 && minor >= 11);
                     }
                 }
             }

MCPForUnity/Editor/Helpers/CodexConfigHelper.cs

@@ -3,6 +3,7 @@
 using System.IO;
 using System.Linq;
 using MCPForUnity.External.Tommy;
+using MCPForUnity.Editor.Services;
 
 namespace MCPForUnity.Editor.Helpers
 {
@@ -62,8 +63,19 @@ public static string UpsertCodexServerBlock(string existingToml, string uvPath,
             }
             var mcpServers = root["mcp_servers"] as TomlTable;
 
-            // Create or update unityMCP table
-            mcpServers["unityMCP"] = CreateUnityMcpTable(uvPath, serverSrc);
+            // Extract existing env table if unityMCP already exists
+            TomlTable existingEnvTable = null;
+            if (mcpServers.TryGetNode("unityMCP", out var existingUnityMcpNode) && existingUnityMcpNode is TomlTable)
+            {
+                var existingUnityMcp = existingUnityMcpNode as TomlTable;
+                if (existingUnityMcp.TryGetNode("env", out var envNode) && envNode is TomlTable)
+                {
+                    existingEnvTable = envNode as TomlTable;
+                }
+            }
+
+            // Create or update unityMCP table, preserving existing env table
+            mcpServers["unityMCP"] = CreateUnityMcpTable(uvPath, serverSrc, existingEnvTable);
 
             // Serialize back to TOML
             using var writer = new StringWriter();
@@ -125,7 +137,10 @@ private static TomlTable TryParseToml(string toml)
         /// <summary>
         /// Creates a TomlTable for the unityMCP server configuration
         /// </summary>
-        private static TomlTable CreateUnityMcpTable(string uvPath, string serverSrc)
+        /// <param name="uvPath">Path to uv executable</param>
+        /// <param name="serverSrc">Path to server source directory</param>
+        /// <param name="existingEnvTable">Optional existing env table to preserve user-defined variables</param>
+        private static TomlTable CreateUnityMcpTable(string uvPath, string serverSrc, TomlTable existingEnvTable = null)
         {
             var unityMCP = new TomlTable();
             unityMCP["command"] = new TomlString { Value = uvPath };
@@ -137,6 +152,31 @@ private static TomlTable CreateUnityMcpTable(string uvPath, string serverSrc)
             argsArray.Add(new TomlString { Value = "server.py" });
             unityMCP["args"] = argsArray;
 
+            // Add Windows-specific environment configuration, see: https://github.com/CoplayDev/unity-mcp/issues/315
+            var platformService = MCPServiceLocator.Platform;
+            if (platformService.IsWindows())
+            {
+                // Reuse existing env table (from parameter or unityMCP) to avoid dropping user keys
+                TomlTable envTable;
+                if (existingEnvTable != null)
+                    envTable = existingEnvTable;
+                else if (unityMCP.TryGetNode("env", out var envNode) && envNode is TomlTable existing)
+                    envTable = existing;
+                else
+                    envTable = new TomlTable();
+
+                string systemRoot = platformService.GetSystemRoot();
+                if (!string.IsNullOrEmpty(systemRoot))
+                    envTable["SystemRoot"] = new TomlString { Value = systemRoot };
+
+                unityMCP["env"] = envTable;
+            }
+            else if (existingEnvTable != null)
+            {
+                // Preserve existing env table even on non-Windows platforms
+                unityMCP["env"] = existingEnvTable;
+            }
+
             return unityMCP;
         }