Worked on stabilizing EFI boot integration within the rhinstaller/anaconda repository, focusing on backend development using Python. Addressed a bug in the EFIBase.efibootmgr() method by normalizing its return value based on the capture parameter, ensuring deterministic and type-consistent results. This change reduced ambiguity in cross-path execution and prevented incorrect error handling when boot operations were bypassed. The update improved boot path reliability for UEFI systems, minimizing installer failures during automated deployments. Demonstrated careful API clean-up and defensive programming practices, aligning return-type semantics with best practices and enhancing maintainability in the bootloader and EFI subsystem code paths.