During January 2026, Jakub Migacz contributed to the curl/curl repository by delivering a targeted bug fix addressing header leakage in CONNECT requests when using HTTPS proxies. He implemented protocol-aware header separation in C, introducing conditional logic to ensure that HTTP headers and proxy headers are handled distinctly based on context. This approach leveraged his expertise in C programming, HTTP protocol handling, and network programming to improve proxy compatibility and reliability. By refining how --header, --proxy-header, and --user-agent are applied, Jakub’s work reduced proxy-related failures and aligned curl’s behavior with enterprise security and compliance requirements, demonstrating thoughtful engineering depth.