During November 2025, Gef3233 developed and delivered the Classic48 split keyboard feature for the qmk/qmk_firmware repository. This work introduced a custom 48-key keyboard with addressable RGB lighting, enabling users to create customizable layouts and lighting effects. Gef3233’s engineering approach involved embedded firmware development in C, JSON-based configuration, and hardware-software integration to support advanced RGB features. The project required end-to-end delivery, from design through firmware integration, and included collaboration with the open-source community. By expanding the QMK firmware ecosystem, Gef3233 enhanced customization options for hobbyists and developers, demonstrating depth in embedded systems and keyboard firmware development. No bugs were reported.