Worked on the koreader/koreader repository to update the Luajit Launcher subproject, focusing on enhancing stability and runtime performance. The primary engineering effort involved bumping the luajit-launcher dependency to a newer commit, which reduced potential bugs and improved compatibility across environments. This update did not introduce new customer-facing features but provided foundational improvements that support faster iteration and lower risk in future development. Demonstrated skills in subproject management and version control, with a technical emphasis on Lua and LuaJIT optimization. Maintained a clean change scope and ensured clear commit traceability through careful cross-repository coordination and dependency management.