Enabled mcp-studio to connect with the agent ide like antigravity

Editor/Settings/McpSettings.cs

@@ -138,6 +138,7 @@ static void Load() {
                 _instance.authToken = GenerateToken();
                 Save();
             }
+            Debug.Log($"[McpSettings] Auth token {_instance.authToken}");
         }
 
         public static void Save() {

Server~/mcp-instructions.md

@@ -0,0 +1,64 @@
+# Connecting to UnityMCP
+
+This guide explains how to test your Unity MCP server from the command line and how to configure Antigravity to use it.
+
+## Testing via CMD (Original HTTP JSON-RPC)
+
+Since the original `server.js` implementation uses HTTP POST JSON-RPC, you can test it directly via Command Prompt or PowerShell without any special MCP client tools. 
+
+Make sure `server.js` is running:
+```cmd
+npm start
+```
+
+**Using Command Prompt (curl):**
+```cmd
+curl -X POST http://127.0.0.1:5173/mcp -H "Content-Type: application/json" -H "Authorization: Bearer dev-local-token" -d "{\"jsonrpc\": \"2.0\", \"id\": 1, \"method\": \"tools/list\"}"
+```
+
+**Using PowerShell:**
+```powershell
+Invoke-RestMethod -Uri "http://127.0.0.1:5173/mcp" -Method Post -Headers @{"Authorization"="Bearer dev-local-token"} -ContentType "application/json" -Body '{"jsonrpc": "2.0", "id": 1, "method": "tools/list"}'
+```
+
+***
+
+## Connecting UnityMCP to Antigravity
+
+Antigravity natively requires an MCP server to communicate through the standard **stdio** transport or **SSE** stream. The newly implemented `src/mcp-stdio.js` allows Antigravity to connect via stdio exactly as intended by the MCP protocol.
+
+### Antigravity Configuration
+
+To attach the server to the Antigravity agent context (or an IDE like Cursor, Windsurf, Claude Desktop), you need to add it to your MCP settings file (typically `mcp.json` or within IDE settings for MCP Servers):
+
+1. **Open your MCP configuration file.**
+2. **Add the following entry snippet:**
+
+```json
+{
+  "mcpServers": {
+    "unity-mcp": {
+      "command": "node",
+      "args": [
+        "f:/Node/UnityMCP/Server~/src/mcp-stdio.js"
+      ],
+      "env": {
+        "MCP_TOKEN": "dev-local-token",
+        "MCP_HTTP_PORT": "5173",
+        "MCP_IPC_PORT": "52100"
+      }
+    }
+  }
+}
+```
+
+### Starting the Server Manually (Troubleshooting)
+If you want to manually run the stdio server to make sure it loads correctly and finds the new MCP SDK:
+```cmd
+npm run mcp
+```
+*(Note: Because it's a `stdio` server, it will appear to hang and not print anything besides standard error logs. This is perfectly normal because it's actively waiting for JSON-RPC inputs from Antigravity over `stdin`)*.
+
+---
+
+**That's it! Once Antigravity restarts or you reload the MCP configurations, it will spin up the `mcp-stdio.js` script in the background and establish a direct connection to your Unity tools.**

Server~/package.json

@@ -4,12 +4,14 @@
     "private": true,
     "type": "commonjs",
     "scripts": {
-        "start": "node src/server.js"
+        "start": "node src/server.js",
+        "mcp": "node src/mcp-stdio.js"
     },
     "engines": {
         "node": ">=18"
     },
     "dependencies": {
+        "@modelcontextprotocol/sdk": "^1.27.1",
         "dotenv": "^17.2.3"
     }
 }