Worked on kernel and build system maintenance across openwrt/packages and coolsnowwolf/immortalwrt repositories, focusing on reliability and maintainability. Addressed build robustness in the Coremark package by implementing idempotent directory creation using shell scripting and Makefile techniques, which improved CI stability and reproducibility. In the ImmortalWRT tree, removed upstreamed Rockchip DRM patches and cleaned up header inclusions, reducing redundant code and aligning the kernel patch set with upstream standards. Demonstrated expertise in C, build systems, and embedded systems by resolving two critical bugs, ultimately streamlining downstream builds and minimizing maintenance overhead for both device drivers and package workflows.