Sylvain developed support for the Shuguet shu89 89-key split TKL keyboard model within the srwi/qmk_firmware repository, targeting RP2040-based builds. He implemented hardware support and keyboard firmware integration, ensuring compatibility with the existing design and providing a seamless user experience. Sylvain authored comprehensive Markdown documentation, detailing model specifications, maintainer information, and step-by-step build and flash instructions to facilitate onboarding and adoption. His work focused on expanding hardware support and laying the groundwork for broader device compatibility. Over the month, Sylvain concentrated on feature delivery, demonstrating depth in hardware integration and documentation, though no bug fixes were addressed during this period.