Andrew Chiang enhanced the microsoft/lisa repository by improving kernel version extraction and GRUB parsing logic, focusing on cross-architecture accuracy for arm64 and aarch64 systems. Using Python and advanced regular expressions, Andrew updated the extraction logic to reduce misreporting of kernel versions and made GRUB menu entry parsing more robust and whitespace-aware. He also contributed detailed code documentation to the CBLMariner OS class, clarifying the extraction and parsing processes with practical examples. This work supports system administration and maintenance by making diagnostics more reliable across diverse environments, demonstrating depth in Linux kernel handling and code documentation within a short timeframe.