During June 2025, contributed a CrossOriginProtection example to the golang/go repository, focusing on secure server-side cross-origin request handling. Developed a practical middleware pattern in Go for the net/http package, demonstrating how to block non-safe cross-origin requests and enforce security best practices. The work included a copy-ready code sample, comprehensive testing guidance, and actionable recommendations to help teams avoid common misconfigurations in cross-origin setups. By providing clear documentation and test scenarios, the contribution aimed to streamline developer onboarding and accelerate the adoption of secure-by-default patterns in backend development, with an emphasis on API security and robust application architecture.