Revert to stable MCP implementation

- Remove problematic stdio import to fix build issues
- Focus on SSE-based MCP servers for now
- Builds should work properly now

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/lib/services/mcp.ts

@@ -1,9 +1,6 @@
 import { experimental_createMCPClient } from 'ai';
 import { createScopedLogger } from '~/utils/logger';
 
-// Dynamic import for stdio transport to avoid build issues
-let Experimental_StdioMCPTransport: any;
-
 const logger = createScopedLogger('mcp-service');
 
 // MCP config types
@@ -92,28 +89,8 @@ async function createStdioClient(serverName: string, config: ServerConfig): Prom
 
   logger.debug(`Creating stdio MCP client for '${serverName}' with command: '${command}' ${args?.join(' ') || ''}`);
 
-  try {
-    // Dynamic import to avoid build issues with missing export
-    if (!Experimental_StdioMCPTransport) {
-      const module = await import('ai/mcp-stdio');
-      Experimental_StdioMCPTransport = module.Experimental_StdioMCPTransport;
-    }
-
-    const transport = new Experimental_StdioMCPTransport({
-      command: command!,
-      args,
-      env,
-      cwd,
-    });
-
-    return await experimental_createMCPClient({ transport });
-  } catch (e) {
-    // Fallback error message for unsupported environments
-    if (e instanceof Error && e.message.includes('Missing')) {
-      throw new Error(`Stdio MCP servers are not supported in this environment. Please use SSE-based servers instead.`);
-    }
-    throw new Error(`Failed to start command "${command}": ${errorToString(e)}`);
-  }
+  // Stdio servers not supported in this environment
+  throw new Error(`Stdio MCP servers are not supported in this environment. Please use SSE-based servers instead. See: https://modelcontextprotocol.io/examples`);
 }
 
 export async function createMCPClients(mcpConfig?: {