Function handler

packages/mcp-client/src/connection.ts:125–133

(data: Buffer)

  let stderrOutput = ''

  const handler = (data: Buffer) => {
    if (stderrOutput.length < maxSize) {
      try {
        stderrOutput += data.toString()
      } catch {
        // Ignore errors from exceeding max string length
      }
    }
  }

  transport.stderr?.on('data', handler)