During February 2025, Egyszeregy contributed to the flipperdevices/u-boot repository by enhancing MMC boot compatibility on ZynqMP boards. They addressed an environment variable handling issue by modifying the storage format of the boot sequence variable, ensuring it is saved in decimal rather than hexadecimal. This was achieved by replacing the env_set_hex function with env_set_ulong, aligning with U-Boot’s expectations for MMC commands. Working in C and leveraging expertise in embedded systems and environment variables, Egyszeregy delivered a focused, low-risk feature that reduces boot-time errors and simplifies boot scripts, demonstrating careful scope management and clear maintainability improvements.