During September 2025, Anton Klein focused on enhancing firmware reliability by addressing data alignment issues in XDR certificate processing within the microsoft/mu_tiano_plus and tianocore/edk2 repositories. He implemented and validated 4-byte alignment fixes in the FmpDevicePkg firmware paths, correcting offset calculations to prevent data access errors during certificate handling. Working primarily in C and leveraging his expertise in embedded systems and firmware development, Anton ensured consistent alignment logic across repositories. His targeted bug fixes reduced boot-time risk and improved the security of the certificate pipeline, demonstrating careful patch management and a deep understanding of low-level data handling requirements.