Developed server-side binary persistence for Catacumbas data in the so1unp/2025-lab-05 repository, enabling the application to retain its state across restarts and improving overall data durability. The implementation involved creating C functions for loading Catacumbas data from a binary file at startup and saving changes automatically, ensuring reliable state management without manual intervention. The developer focused on system programming concepts, leveraging file I/O and data persistence techniques to enhance reliability. Additionally, the build process was streamlined by updating the Makefile to remove the client executable, aligning build artifacts with the new server persistence functionality and supporting maintainable deployment.