mcp-mcp-windows-spawn-fi-on-windows-starting-an-mcp-server-via-the-typescri-47be5d80

THEN As a workaround, either configure the server command to use cmd.exe with '/C' prefix, or patch the SDK to set `shell: true` on Windows only (e.g., `shell: process.platform === 'win32'`). Note that using shell may cause terminal windows to appear unexpectedly, so prefer the cmd.exe workaround if possible. Alternatively, use cross-spawn as a replacement for child_process.spawn.

// In client/stdio.ts, change spawn call:
// Original: spawn(command, args, options)
// Windows fix: spawn(command, args, { ...options, shell: process.platform === 'win32' })

// Or configure server to run via cmd.exe:
// {
//   "command": "cmd",
//   "args": ["/C", "npx -y @modelcontextprotocol/server-filesystem /path"]
// }