hello_world({
   "X-Cloud-Trace-Context": "5b4b2cee0dad1c312de35059b9d98747/15128252986131251192",
   "traceparent": "00-5b4b2cee0dad1c312de35059b9d98747-d1f259f01e987ff8-00",
   "host": "headers.jsontest.com",
   "accept": "*/*",
   "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
});