Gavin Guo focused on improving the stability and correctness of sticky-domain scheduling decisions in the sched-ext/scx repository. During this period, he addressed a critical bug in the test_cpu_stickable path by correcting an array index mismatch, ensuring accurate domain ID handling and preventing potential desynchronization in CPU affinity logic. His work involved low-level kernel development using C and BPF, with careful attention to test maintenance and code review standards. By delivering a targeted, single-commit fix with minimal impact on surrounding code, Gavin demonstrated depth in kernel scheduling logic and contributed to the reliability of the sched-ext/scx codebase.