chore(mcp): migrate from bun

Signed-off-by: Tyler Slaton <tyler@copilotkit.ai>

Author: tylerslaton

apps/mcp/package.json

@@ -18,8 +18,8 @@
   "scripts": {
     "build": "tsc --noEmit && cross-env INPUT=mcp-app.html vite build",
     "watch": "cross-env INPUT=mcp-app.html vite build --watch",
-    "serve:http": "bun --watch server.ts",
-    "serve:stdio": "bun server.ts --stdio",
+    "serve:http": "tsx watch server.ts",
+    "serve:stdio": "tsx server.ts --stdio",
     "start": "npm run start:http",
     "start:http": "cross-env NODE_ENV=development npm run build && npm run serve:http",
     "start:stdio": "cross-env NODE_ENV=development npm run build && npm run serve:stdio",
@@ -46,6 +46,7 @@
     "cors": "^2.8.5",
     "cross-env": "^10.1.0",
     "express": "^5.1.0",
+    "tsx": "^4.19.2",
     "typescript": "^5.9.3",
     "vite": "^6.0.0",
     "vite-plugin-singlefile": "^2.3.0"

apps/mcp/server.ts

@@ -13,14 +13,16 @@ import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js"
 import type { ReadResourceResult } from "@modelcontextprotocol/sdk/types.js";
 import fs from "node:fs/promises";
 import path from "node:path";
+import { fileURLToPath } from "node:url";
 import { z } from "zod";
 import { startServer } from "./server-utils.js";
 
 // =============================================================================
 // Constants
 // =============================================================================
 
-const DIST_DIR = path.join(import.meta.dirname, "dist");
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const DIST_DIR = path.join(__dirname, "dist");
 
 // Default code example for the Three.js widget
 const DEFAULT_THREEJS_CODE = `const scene = new THREE.Scene();

apps/mcp/tsconfig.json

@@ -7,7 +7,8 @@
     "allowImportingTsExtensions": true,
     "resolveJsonModule": true,
     "isolatedModules": true,
-    "verbatimModuleSyntax": true,
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
     "noEmit": true,
     "jsx": "react-jsx",
     "strict": true,