Add Claude Code support with register/unregister toggle

- Added Claude Code as new MCP client type
- One-click registration via 'claude mcp add' command
- Toggle button to unregister when already configured
- Cross-platform support (Windows/macOS/Linux)
- Auto-detects configuration in ~/.claude.json

UnityMcpBridge/Editor/Data/McpClients.cs

@@ -63,6 +63,20 @@ namespace UnityMcpBridge.Editor.Data
                 mcpType = McpTypes.VSCode,
                 configStatus = "Not Configured",
             },
+            new()
+            {
+                name = "Claude Code",
+                windowsConfigPath = Path.Combine(
+                    Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
+                    ".claude.json"
+                ),
+                linuxConfigPath = Path.Combine(
+                    Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
+                    ".claude.json"
+                ),
+                mcpType = McpTypes.ClaudeCode,
+                configStatus = "Not Configured",
+            },
         };
 
         // Initialize status enums after construction

UnityMcpBridge/Editor/Models/McpTypes.cs

@@ -5,6 +5,7 @@ namespace UnityMcpBridge.Editor.Models
         ClaudeDesktop,
         Cursor,
         VSCode,
+        ClaudeCode,
     }
 }
 

UnityMcpBridge/Editor/Windows/ManualConfigEditorWindow.cs

@@ -39,7 +39,7 @@ namespace UnityMcpBridge.Editor.Windows
             );
             GUI.Label(
                 new Rect(titleRect.x + 10, titleRect.y + 6, titleRect.width - 20, titleRect.height),
-                mcpClient.name + " Manual Configuration",
+                (mcpClient?.name ?? "Unknown") + " Manual Configuration",
                 EditorStyles.boldLabel
             );
             EditorGUILayout.Space(10);
@@ -70,17 +70,17 @@ namespace UnityMcpBridge.Editor.Windows
             };
 
             EditorGUILayout.LabelField(
-                "1. Open " + mcpClient.name + " config file by either:",
+                "1. Open " + (mcpClient?.name ?? "Unknown") + " config file by either:",
                 instructionStyle
             );
-            if (mcpClient.mcpType == McpTypes.ClaudeDesktop)
+            if (mcpClient?.mcpType == McpTypes.ClaudeDesktop)
             {
                 EditorGUILayout.LabelField(
                     "    a) Going to Settings > Developer > Edit Config",
                     instructionStyle
                 );
             }
-            else if (mcpClient.mcpType == McpTypes.Cursor)
+            else if (mcpClient?.mcpType == McpTypes.Cursor)
             {
                 EditorGUILayout.LabelField(
                     "    a) Going to File > Preferences > Cursor Settings > MCP > Add new global MCP server",
@@ -96,6 +96,8 @@ namespace UnityMcpBridge.Editor.Windows
             // Path section with improved styling
             EditorGUILayout.BeginVertical(EditorStyles.helpBox);
             string displayPath;
+            if (mcpClient != null)
+            {
                 if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
                 {
                     displayPath = mcpClient.windowsConfigPath;
@@ -111,6 +113,11 @@ namespace UnityMcpBridge.Editor.Windows
                 {
                     displayPath = configPath;
                 }
+            }
+            else
+            {
+                displayPath = configPath;
+            }
 
             // Prevent text overflow by allowing the text field to wrap
             GUIStyle pathStyle = new(EditorStyles.textField) { wordWrap = true };
@@ -224,7 +231,7 @@ namespace UnityMcpBridge.Editor.Windows
 
             EditorGUILayout.Space(10);
             EditorGUILayout.LabelField(
-                "3. Save the file and restart " + mcpClient.name,
+                "3. Save the file and restart " + (mcpClient?.name ?? "Unknown"),
                 instructionStyle
             );
 

UnityMcpBridge/Editor/Windows/UnityMcpEditorWindow.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Runtime.InteropServices;
@@ -54,6 +55,16 @@ namespace UnityMcpBridge.Editor.Windows
             LoadValidationLevelSetting();
         }
         
+        private void OnFocus()
+        {
+            // Refresh configuration status when window gains focus
+            foreach (McpClient mcpClient in mcpClients.clients)
+            {
+                CheckMcpConfiguration(mcpClient);
+            }
+            Repaint();
+        }
+
         private Color GetStatusColor(McpStatus status)
         {
             // Return appropriate color based on the status enum
@@ -326,6 +337,23 @@ namespace UnityMcpBridge.Editor.Windows
                     ConfigureMcpClient(mcpClient);
                 }
             }
+            else if (mcpClient.mcpType == McpTypes.ClaudeCode)
+            {
+                bool isConfigured = mcpClient.status == McpStatus.Configured;
+                string buttonText = isConfigured ? "Unregister UnityMCP with Claude Code" : "Register with Claude Code";
+                if (GUILayout.Button(buttonText, GUILayout.Height(32)))
+                {
+                    if (isConfigured)
+                    {
+                        UnregisterWithClaudeCode();
+                    }
+                    else
+                    {
+                        string pythonDir = FindPackagePythonDirectory();
+                        RegisterWithClaudeCode(pythonDir);
+                    }
+                }
+            }
             else
             {
                 if (GUILayout.Button($"Auto Configure", GUILayout.Height(32)))
@@ -334,6 +362,8 @@ namespace UnityMcpBridge.Editor.Windows
                 }
             }
             
+            if (mcpClient.mcpType != McpTypes.ClaudeCode)
+            {
                 if (GUILayout.Button("Manual Setup", GUILayout.Height(32)))
                 {
                     string configPath = RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
@@ -366,6 +396,7 @@ namespace UnityMcpBridge.Editor.Windows
                         ShowManualInstructionsWindow(configPath, mcpClient);
                     }
                 }
+            }
             
             EditorGUILayout.EndHorizontal();
             
@@ -413,7 +444,7 @@ namespace UnityMcpBridge.Editor.Windows
                 }
                 catch (Exception e)
                 {
-                    Debug.LogWarning($"Error reading existing config: {e.Message}.");
+                    UnityEngine.Debug.LogWarning($"Error reading existing config: {e.Message}.");
                 }
             }
 
@@ -546,12 +577,17 @@ namespace UnityMcpBridge.Editor.Windows
                         if (package.name == "com.justinpbarnett.unity-mcp")
                         {
                             string packagePath = package.resolvedPath;
-                            string potentialPythonDir = Path.Combine(packagePath, "Python");
                             
-                            if (
+                            // Check for local package structure (UnityMcpServer/src)
-                                Directory.Exists(potentialPythonDir)
+                            string localPythonDir = Path.Combine(Path.GetDirectoryName(packagePath), "UnityMcpServer", "src");
-                                && File.Exists(Path.Combine(potentialPythonDir, "server.py"))
+                            if (Directory.Exists(localPythonDir) && File.Exists(Path.Combine(localPythonDir, "server.py")))
-                            )
+                            {
+                                return localPythonDir;
+                            }
+                            
+                            // Check for old structure (Python subdirectory)
+                            string potentialPythonDir = Path.Combine(packagePath, "Python");
+                            if (Directory.Exists(potentialPythonDir) && File.Exists(Path.Combine(potentialPythonDir, "server.py")))
                             {
                                 return potentialPythonDir;
                             }
@@ -560,13 +596,22 @@ namespace UnityMcpBridge.Editor.Windows
                 }
                 else if (request.Error != null)
                 {
-                    Debug.LogError("Failed to list packages: " + request.Error.message);
+                    UnityEngine.Debug.LogError("Failed to list packages: " + request.Error.message);
                 }
 
                 // If not found via Package Manager, try manual approaches
-                // First check for local installation
+                // Check for local development structure
                 string[] possibleDirs =
                 {
+                    // Check in the Unity project's Packages folder (for local package development)
+                    Path.GetFullPath(Path.Combine(Application.dataPath, "..", "Packages", "unity-mcp", "UnityMcpServer", "src")),
+                    // Check relative to the Unity project (for development)
+                    Path.GetFullPath(Path.Combine(Application.dataPath, "..", "unity-mcp", "UnityMcpServer", "src")),
+                    // Check in user's home directory (common installation location)
+                    Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "unity-mcp", "UnityMcpServer", "src"),
+                    // Check in Applications folder (macOS/Linux common location)
+                    Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "Applications", "UnityMCP", "UnityMcpServer", "src"),
+                    // Legacy Python folder structure
                     Path.GetFullPath(Path.Combine(Application.dataPath, "unity-mcp", "Python")),
                 };
 
@@ -579,11 +624,11 @@ namespace UnityMcpBridge.Editor.Windows
                 }
 
                 // If still not found, return the placeholder path
-                Debug.LogWarning("Could not find Python directory, using placeholder path");
+                UnityEngine.Debug.LogWarning("Could not find Python directory, using placeholder path");
             }
             catch (Exception e)
             {
-                Debug.LogError($"Error finding package path: {e.Message}");
+                UnityEngine.Debug.LogError($"Error finding package path: {e.Message}");
             }
 
             return pythonDir;
@@ -651,7 +696,7 @@ namespace UnityMcpBridge.Editor.Windows
                 }
 
                 ShowManualInstructionsWindow(configPath, mcpClient);
-                Debug.LogError(
+                UnityEngine.Debug.LogError(
                     $"Failed to configure {mcpClient.name}: {e.Message}\n{e.StackTrace}"
                 );
                 return $"Failed to configure {mcpClient.name}";
@@ -735,6 +780,13 @@ namespace UnityMcpBridge.Editor.Windows
         {
             try
             {
+                // Special handling for Claude Code
+                if (mcpClient.mcpType == McpTypes.ClaudeCode)
+                {
+                    CheckClaudeCodeConfiguration(mcpClient);
+                    return;
+                }
+                
                 string configPath;
                 if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
                 {
@@ -814,5 +866,255 @@ namespace UnityMcpBridge.Editor.Windows
                 mcpClient.SetStatus(McpStatus.Error, e.Message);
             }
         }
+
+        private void RegisterWithClaudeCode(string pythonDir)
+        {
+            string command;
+            string args;
+
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+            {
+                command = "claude";
+                
+                // Try to find uv.exe in common locations
+                string uvPath = FindWindowsUvPath();
+                
+                if (string.IsNullOrEmpty(uvPath))
+                {
+                    // Fallback to expecting uv in PATH
+                    args = $"mcp add UnityMCP -- uv --directory \"{pythonDir}\" run server.py";
+                }
+                else
+                {
+                    args = $"mcp add UnityMCP -- \"{uvPath}\" --directory \"{pythonDir}\" run server.py";
+                }
+            }
+            else
+            {
+                // Use full path to claude command
+                command = "/usr/local/bin/claude";
+                args = $"mcp add UnityMCP -- uv --directory \"{pythonDir}\" run server.py";
+            }
+
+            try
+            {
+                // Get the Unity project directory (where the Assets folder is)
+                string unityProjectDir = Application.dataPath;
+                string projectDir = Path.GetDirectoryName(unityProjectDir);
+
+                var psi = new ProcessStartInfo
+                {
+                    FileName = command,
+                    Arguments = args,
+                    UseShellExecute = false,
+                    RedirectStandardOutput = true,
+                    RedirectStandardError = true,
+                    CreateNoWindow = true,
+                    WorkingDirectory = projectDir // Set working directory to Unity project directory
+                };
+
+                // Set PATH to include common binary locations
+                string currentPath = Environment.GetEnvironmentVariable("PATH") ?? "";
+                string additionalPaths = "/usr/local/bin:/opt/homebrew/bin:/usr/bin:/bin";
+                psi.EnvironmentVariables["PATH"] = $"{additionalPaths}:{currentPath}";
+
+                using var process = Process.Start(psi);
+                string output = process.StandardOutput.ReadToEnd();
+                string errors = process.StandardError.ReadToEnd();
+                process.WaitForExit();
+
+
+                
+                // Check for success or already exists
+                if (output.Contains("Added stdio MCP server") || errors.Contains("already exists"))
+                {
+                    // Force refresh the configuration status
+                    var claudeClient = mcpClients.clients.FirstOrDefault(c => c.mcpType == McpTypes.ClaudeCode);
+                    if (claudeClient != null)
+                    {
+                        CheckMcpConfiguration(claudeClient);
+                    }
+                    Repaint();
+                    
+
+                }
+                else if (!string.IsNullOrEmpty(errors))
+                {
+                    UnityEngine.Debug.LogWarning($"Claude MCP errors: {errors}");
+                }
+            }
+            catch (Exception e)
+            {
+                UnityEngine.Debug.LogError($"Claude CLI registration failed: {e.Message}");
+            }
+        }
+
+        private void UnregisterWithClaudeCode()
+        {
+            string command;
+
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+            {
+                command = "claude";
+            }
+            else
+            {
+                // Use full path to claude command
+                command = "/usr/local/bin/claude";
+            }
+
+            try
+            {
+                // Get the Unity project directory (where the Assets folder is)
+                string unityProjectDir = Application.dataPath;
+                string projectDir = Path.GetDirectoryName(unityProjectDir);
+
+                var psi = new ProcessStartInfo
+                {
+                    FileName = command,
+                    Arguments = "mcp remove UnityMCP",
+                    UseShellExecute = false,
+                    RedirectStandardOutput = true,
+                    RedirectStandardError = true,
+                    CreateNoWindow = true,
+                    WorkingDirectory = projectDir // Set working directory to Unity project directory
+                };
+
+                // Set PATH to include common binary locations
+                string currentPath = Environment.GetEnvironmentVariable("PATH") ?? "";
+                string additionalPaths = "/usr/local/bin:/opt/homebrew/bin:/usr/bin:/bin";
+                psi.EnvironmentVariables["PATH"] = $"{additionalPaths}:{currentPath}";
+
+                using var process = Process.Start(psi);
+                string output = process.StandardOutput.ReadToEnd();
+                string errors = process.StandardError.ReadToEnd();
+                process.WaitForExit();
+
+                // Check for success
+                if (output.Contains("Removed MCP server") || process.ExitCode == 0)
+                {
+                    // Force refresh the configuration status
+                    var claudeClient = mcpClients.clients.FirstOrDefault(c => c.mcpType == McpTypes.ClaudeCode);
+                    if (claudeClient != null)
+                    {
+                        CheckMcpConfiguration(claudeClient);
+                    }
+                    Repaint();
+                    
+                    UnityEngine.Debug.Log("UnityMCP server successfully unregistered from Claude Code.");
+                }
+                else if (!string.IsNullOrEmpty(errors))
+                {
+                    UnityEngine.Debug.LogWarning($"Claude MCP removal errors: {errors}");
+                }
+            }
+            catch (Exception e)
+            {
+                UnityEngine.Debug.LogError($"Claude CLI unregistration failed: {e.Message}");
+            }
+        }
+
+        private string FindWindowsUvPath()
+        {
+            string appData = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
+            
+            // Check for different Python versions
+            string[] pythonVersions = { "Python313", "Python312", "Python311", "Python310", "Python39", "Python38" };
+            
+            foreach (string version in pythonVersions)
+            {
+                string uvPath = Path.Combine(appData, version, "Scripts", "uv.exe");
+                if (File.Exists(uvPath))
+                {
+                    return uvPath;
+                }
+            }
+            
+            // Check Program Files locations
+            string[] programFilesPaths = {
+                Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ProgramFiles), "Python"),
+                Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ProgramFilesX86), "Python"),
+                Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Programs", "Python")
+            };
+            
+            foreach (string basePath in programFilesPaths)
+            {
+                if (Directory.Exists(basePath))
+                {
+                    foreach (string dir in Directory.GetDirectories(basePath, "Python*"))
+                    {
+                        string uvPath = Path.Combine(dir, "Scripts", "uv.exe");
+                        if (File.Exists(uvPath))
+                        {
+                            return uvPath;
+                        }
+                    }
+                }
+            }
+            
+            return null; // Will fallback to using 'uv' from PATH
+        }
+
+        private void CheckClaudeCodeConfiguration(McpClient mcpClient)
+        {
+            try
+            {
+                // Get the Unity project directory to check project-specific config
+                string unityProjectDir = Application.dataPath;
+                string projectDir = Path.GetDirectoryName(unityProjectDir);
+                
+                // Read the global Claude config file
+                string configPath = mcpClient.linuxConfigPath; // ~/.claude.json
+                if (!File.Exists(configPath))
+                {
+                    mcpClient.SetStatus(McpStatus.NotConfigured);
+                    return;
+                }
+                
+                string configJson = File.ReadAllText(configPath);
+                dynamic claudeConfig = JsonConvert.DeserializeObject(configJson);
+                
+                // Check for UnityMCP server in the mcpServers section (current format)
+                if (claudeConfig?.mcpServers != null)
+                {
+                    var servers = claudeConfig.mcpServers;
+                    if (servers.UnityMCP != null || servers.unityMCP != null)
+                    {
+                        // Found UnityMCP configured
+                        mcpClient.SetStatus(McpStatus.Configured);
+                        return;
+                    }
+                }
+                
+                // Also check if there's a project-specific configuration for this Unity project (legacy format)
+                if (claudeConfig?.projects != null)
+                {
+                    // Look for the project path in the config
+                    foreach (var project in claudeConfig.projects)
+                    {
+                        string projectPath = project.Name;
+                        if (projectPath == projectDir && project.Value?.mcpServers != null)
+                        {
+                            // Check for UnityMCP (case variations)
+                            var servers = project.Value.mcpServers;
+                            if (servers.UnityMCP != null || servers.unityMCP != null)
+                            {
+                                // Found UnityMCP configured for this project
+                                mcpClient.SetStatus(McpStatus.Configured);
+                                return;
+                            }
+                        }
+                    }
+                }
+                
+                // No configuration found for this project
+                mcpClient.SetStatus(McpStatus.NotConfigured);
+            }
+            catch (Exception e)
+            {
+                UnityEngine.Debug.LogWarning($"Error checking Claude Code config: {e.Message}");
+                mcpClient.SetStatus(McpStatus.Error, e.Message);
+            }
+        }
     }
 }