During November 2024, Gaumless focused on improving codebase hygiene for the Dasharo/coreboot repository by performing a comprehensive cleanup of unused header files. Working primarily in C and leveraging expertise in embedded systems and firmware development, Gaumless systematically identified and removed obsolete definitions, including deprecated SMI functions, mainboard-specific RAS headers, and redundant AMD/Intel SoC register files. This targeted effort reduced code bloat and clarified code paths, making the repository more maintainable and easier to update. The work was thoroughly documented, ensuring traceability and clear rationale for each change, and laid a foundation for safer future refactoring and onboarding.