Alex Guo worked on stabilizing timekeeping within the momo5502/emulator repository, focusing on improving determinism and reliability for time-dependent logic and tests. By configuring kusd.BaselineSystemTimeQpc to UINT64_MAX, Alex ensured that std::chrono::system_clock::now() accurately reflected system time, effectively reducing clock drift and preventing unintended host clock adjustments. This C++-based solution addressed a subtle but impactful bug in emulator time management, leveraging expertise in emulator development, system programming, and Windows internals. The work resulted in a single, auditable change with minimal surface area, enhancing the accuracy of time-related operations and supporting more reliable performance assessments within the emulator.