Over a two-month period, Mochaa modernized build and packaging workflows across karlseguin/quickjs and openwrt/packages. For QuickJS, Mochaa replaced the legacy build system with Meson, updated CI/CD pipelines for cross-platform compatibility, and refactored memory allocation logic in C to address sanitizer warnings, improving runtime safety. In openwrt/packages, Mochaa updated the Tailscale package to v1.80.3, revising Makefiles and source verification for secure, reliable releases. Mochaa also enhanced CI workflow robustness by improving shell quoting, reducing build failures due to path issues. The work demonstrated strong skills in C, build systems, and shell scripting, with careful attention to maintainability.