During April 2025, iKonnyaku40 focused on enhancing documentation quality and repository hygiene for the cpprefjp/site project, which serves as a reference for the C++ Standard Library. Their work involved refining documentation accuracy, improving grammar, and ensuring correct usage of includes, particularly addressing missing headers such as <mutex> in barrier examples. They also removed redundant std::move calls in splice operations for std::list and std::forward_list, contributing to code clarity. By introducing a repository-level .gitignore, iKonnyaku40 improved maintainability and onboarding for new contributors. The work demonstrated solid application of C++, Markdown, and version control practices, emphasizing maintainable engineering.