During a two-month period, Xlighting focused on kernel and build system maintenance across openwrt/packages and coolsnowwolf/immortalwrt repositories. In ImmortalWRT, Xlighting improved kernel build consistency by removing upstreamed Rockchip DRM patches, cleaning header inclusions, and deleting obsolete files, which reduced maintenance overhead and patch drift. For openwrt/packages, Xlighting addressed build robustness in the Coremark package by implementing idempotent directory creation using shell scripting and Makefile adjustments, preventing rerun failures and improving CI reliability. Working primarily in C and Makefile, Xlighting demonstrated depth in device driver maintenance, embedded systems, and build system hardening, contributing to more stable downstream workflows.