Worked on the itchyny/go repository to update documentation in preparation for upcoming changes in Go 1.26, specifically addressing the deprecation of the Synctest Run function. The contribution focused on providing clear migration guidance to the Test function, ensuring users can transition smoothly and maintain compatibility with future Go releases. This proactive documentation update aimed to reduce upgrade friction and support long-term maintainability for backend systems using Go. The work demonstrated a strong understanding of Go’s evolving ecosystem and backend development practices, emphasizing careful alignment with language updates rather than direct code changes or bug fixes during the reported period.