Brit Chesley focused on enhancing firmware reliability in the tianocore/edk2-platforms repository by addressing System Management Mode (SMM) base address detection across multiple CPU architectures. Using C and low-level programming techniques, Brit implemented logic to differentiate between AMD and Intel processors, ensuring the correct Model-Specific Register (MSR) was read for accurate SMM base address identification. The work included adding AMD-specific Smbase validation through TestPointCheckLib, which strengthened platform initialization checks. By consolidating these changes, Brit reduced SMM detection errors in multi-CPU environments, demonstrating a deep understanding of firmware development and system management mode intricacies within complex hardware contexts.