Sam Cox focused on stabilizing the build and release process for the HDRUK/gateway-api repository, addressing a critical issue that was blocking successful continuous integration. By identifying and removing the problematic TestFederation.php file from the 1.21.0 release, Sam resolved persistent build failures and restored CI reliability. This targeted intervention, implemented using PHP and the Laravel framework, improved release governance and reduced the risk of customer-impacting outages. Although no new features were shipped during this period, Sam’s work demonstrated a methodical approach to codebase maintenance, emphasizing quality assurance and operational stability over rapid feature delivery in a production environment.