feat: add comprehensive dependency requirement warnings

- Add critical warnings throughout setup wizard that package cannot function without dependencies
- Update package.json description to clearly state manual dependency installation requirement
- Prevent setup completion if dependencies are missing
- Enhance skip setup warning to emphasize package will be non-functional
- Add error messages explaining consequences of missing dependencies
- Update menu item to indicate setup wizard is required
- Ensure users understand package is completely non-functional without proper dependency installation

Author: Claude

UnityMcpBridge/Editor/Setup/SetupWizard.cs

@@ -205,7 +205,7 @@ public static void ResetSetupState()
         /// <summary>
         /// Force show setup wizard (for manual invocation)
         /// </summary>
-        [MenuItem("Window/MCP for Unity/Setup Wizard", priority = 1)]
+        [MenuItem("Window/MCP for Unity/Setup Wizard (Required)", priority = 1)]
         public static void ShowSetupWizardManual()
         {
             ShowSetupWizard();

UnityMcpBridge/Editor/Setup/SetupWizardWindow.cs

@@ -110,6 +110,14 @@ private void DrawWelcomeStep()
             );
             EditorGUILayout.Space();
 
+            // IMPORTANT: Dependency requirement warning
+            EditorGUILayout.HelpBox(
+                "⚠️ IMPORTANT: This package CANNOT be used without installing the required dependencies first!\n\n" +
+                "MCP for Unity requires external dependencies that must be manually installed on your system before it will function.",
+                MessageType.Warning
+            );
+            EditorGUILayout.Space();
+            
             EditorGUILayout.LabelField("What is MCP for Unity?", EditorStyles.boldLabel);
             EditorGUILayout.LabelField(
                 "MCP for Unity is a bridge that connects AI assistants like Claude Code, Cursor, and VSCode to your Unity Editor, " +
@@ -118,16 +126,25 @@ private void DrawWelcomeStep()
             );
             EditorGUILayout.Space();
 
+            EditorGUILayout.LabelField("REQUIRED Dependencies (Must be installed manually):", EditorStyles.boldLabel);
+            var originalColor = GUI.color;
+            GUI.color = Color.red;
+            EditorGUILayout.LabelField("• Python 3.10 or later", EditorStyles.boldLabel);
+            EditorGUILayout.LabelField("• UV package manager", EditorStyles.boldLabel);
+            GUI.color = originalColor;
+            EditorGUILayout.Space();
+            
             EditorGUILayout.LabelField("Setup Process:", EditorStyles.boldLabel);
             EditorGUILayout.LabelField("1. Check system dependencies (Python & UV)", EditorStyles.label);
-            EditorGUILayout.LabelField("2. Get installation guidance if needed", EditorStyles.label);
+            EditorGUILayout.LabelField("2. Install missing dependencies manually", EditorStyles.label);
             EditorGUILayout.LabelField("3. Configure your AI clients", EditorStyles.label);
             EditorGUILayout.LabelField("4. Start using AI assistance in Unity!", EditorStyles.label);
             EditorGUILayout.Space();
 
             EditorGUILayout.HelpBox(
-                "This wizard will guide you through each step. You can complete setup at your own pace.",
-                MessageType.Info
+                "This package will NOT work until you complete ALL dependency installation steps. " +
+                "The wizard provides installation guidance, but you must install dependencies manually.",
+                MessageType.Error
             );
         }
 
@@ -166,8 +183,18 @@ private void DrawDependencyCheckStep()
             {
                 EditorGUILayout.Space();
                 EditorGUILayout.HelpBox(
-                    "Some dependencies are missing. The next step will help you install them.",
-                    MessageType.Warning
+                    "⚠️ CRITICAL: MCP for Unity CANNOT function with missing dependencies!\n\n" +
+                    "The package will not work until ALL required dependencies are manually installed on your system. " +
+                    "The next step provides installation guidance.",
+                    MessageType.Error
+                );
+            }
+            else
+            {
+                EditorGUILayout.Space();
+                EditorGUILayout.HelpBox(
+                    "✅ All dependencies detected! MCP for Unity can now function properly.",
+                    MessageType.Info
                 );
             }
         }
@@ -231,9 +258,10 @@ private void DrawInstallationOptionsStep()
             EditorGUILayout.Space();
 
             EditorGUILayout.HelpBox(
-                "Please install the missing dependencies manually using the instructions below. " +
-                "After installation, you can check dependencies again and proceed to client configuration.",
-                MessageType.Warning
+                "🚨 PACKAGE WILL NOT WORK: You MUST install the missing dependencies manually!\n\n" +
+                "MCP for Unity cannot function without these dependencies. Follow the instructions below carefully. " +
+                "After installation, check dependencies again to verify successful installation.",
+                MessageType.Error
             );
             EditorGUILayout.Space();
 
@@ -340,12 +368,32 @@ private void DrawCompleteStep()
             else
             {
                 EditorGUILayout.HelpBox(
-                    "Setup incomplete. Some dependencies may still be missing. Please review the previous steps.",
-                    MessageType.Warning
+                    "🚨 SETUP INCOMPLETE - PACKAGE WILL NOT WORK!\n\n" +
+                    "MCP for Unity CANNOT function because required dependencies are still missing. " +
+                    "The package is non-functional until ALL dependencies are properly installed.",
+                    MessageType.Error
                 );
 
                 EditorGUILayout.Space();
-                if (GUILayout.Button("Go Back to Dependency Check"))
+                EditorGUILayout.LabelField("Missing Dependencies:", EditorStyles.boldLabel);
+                var missingDeps = _dependencyResult.GetMissingRequired();
+                foreach (var dep in missingDeps)
+                {
+                    var originalColor = GUI.color;
+                    GUI.color = Color.red;
+                    EditorGUILayout.LabelField($"✗ {dep.Name}", EditorStyles.boldLabel);
+                    GUI.color = originalColor;
+                }
+                
+                EditorGUILayout.Space();
+                EditorGUILayout.HelpBox(
+                    "You must install ALL missing dependencies before MCP for Unity will work. " +
+                    "Go back to the installation guide and complete the required installations.",
+                    MessageType.Error
+                );
+                
+                EditorGUILayout.Space();
+                if (GUILayout.Button("Go Back to Install Dependencies", GUILayout.Height(30)))
                 {
                     _currentStep = 1;
                 }
@@ -364,17 +412,20 @@ private void DrawClientConfigurationStep()
             EditorGUILayout.Space();
 
             // Check if dependencies are ready first
+            _dependencyResult = DependencyManager.CheckAllDependencies(); // Refresh check
             if (!_dependencyResult.IsSystemReady)
             {
                 EditorGUILayout.HelpBox(
-                    "Dependencies are not fully installed yet. Please complete dependency installation before configuring clients.",
-                    MessageType.Warning
+                    "🚨 CANNOT CONFIGURE CLIENTS: Dependencies are not installed!\n\n" +
+                    "MCP for Unity requires ALL dependencies to be installed before client configuration can work. " +
+                    "Please complete dependency installation first.",
+                    MessageType.Error
                 );
 
-                if (GUILayout.Button("Go Back to Check Dependencies"))
+                EditorGUILayout.Space();
+                if (GUILayout.Button("Go Back to Install Dependencies", GUILayout.Height(30)))
                 {
                     _currentStep = 1; // Go back to dependency check
-                    _dependencyResult = DependencyManager.CheckAllDependencies();
                 }
                 return;
             }
@@ -546,9 +597,13 @@ private void DrawFooter()
             if (GUILayout.Button("Skip Setup"))
             {
                 bool dismiss = EditorUtility.DisplayDialog(
-                    "Skip Setup",
-                    "Are you sure you want to skip the setup? You can run it again later from the Window menu.",
-                    "Skip",
+                    "Skip Setup - Package Will Not Work!",
+                    "⚠️ WARNING: If you skip setup, MCP for Unity will NOT function!\n\n" +
+                    "This package requires Python 3.10+ and UV package manager to work. " +
+                    "Without completing setup and installing dependencies, the package is completely non-functional.\n\n" +
+                    "You can run setup again later from Window > MCP for Unity > Setup Wizard.\n\n" +
+                    "Are you sure you want to skip setup and leave the package non-functional?",
+                    "Skip (Package Won't Work)",
                     "Cancel"
                 );
 
@@ -562,13 +617,30 @@ private void DrawFooter()
             // Next/Finish button
             string nextButtonText = _currentStep == _stepTitles.Length - 1 ? "Finish" : "Next";
 
+            // Disable finish button if dependencies are missing
+            bool canFinish = _currentStep != _stepTitles.Length - 1 || _dependencyResult.IsSystemReady;
+            GUI.enabled = canFinish;
+            
             if (GUILayout.Button(nextButtonText))
             {
                 if (_currentStep == _stepTitles.Length - 1)
                 {
-                    // Finish setup
-                    SetupWizard.MarkSetupCompleted();
-                    Close();
+                    // Only allow finish if dependencies are ready
+                    if (_dependencyResult.IsSystemReady)
+                    {
+                        SetupWizard.MarkSetupCompleted();
+                        Close();
+                    }
+                    else
+                    {
+                        EditorUtility.DisplayDialog(
+                            "Cannot Complete Setup",
+                            "Cannot finish setup because required dependencies are still missing!\n\n" +
+                            "MCP for Unity will not work without ALL dependencies installed. " +
+                            "Please install Python 3.10+ and UV package manager first.",
+                            "OK"
+                        );
+                    }
                 }
                 else
                 {

UnityMcpBridge/package.json

@@ -2,7 +2,7 @@
   "name": "com.coplaydev.unity-mcp",
   "version": "3.4.0",
   "displayName": "MCP for Unity",
-  "description": "A bridge that connects an LLM to Unity via the MCP (Model Context Protocol). This allows MCP Clients like Claude Desktop or Cursor to directly control your Unity Editor.\n\nJoin Our Discord: https://discord.gg/y4p8KfzrN4",
+  "description": "⚠️ REQUIRES MANUAL DEPENDENCY INSTALLATION: This package CANNOT function without Python 3.10+ and UV package manager installed on your system first!\n\nA bridge that connects AI assistants to Unity via the MCP (Model Context Protocol). Allows MCP clients like Claude Code, Cursor, and VSCode to directly control your Unity Editor.\n\n🚨 IMPORTANT: You MUST manually install Python 3.10+ and UV package manager before this package will work. The setup wizard provides installation guidance.\n\nJoin Our Discord: https://discord.gg/y4p8KfzrN4",
   "unity": "2021.3",
   "documentationUrl": "https://github.com/CoplayDev/unity-mcp",
   "licensesUrl": "https://github.com/CoplayDev/unity-mcp/blob/main/LICENSE",