Hyungcheol Yoon developed updated analytics documentation for the TOAST-DOCS/Gamebase repository, focusing on new user metrics and retention graphs to support product decision-making and developer onboarding. He consolidated documentation changes to reflect recent UI updates, ensuring clarity and consistency across Japanese, English, and Chinese locales. Using Markdown and leveraging skills in analytics, content management, and data visualization, Hyungcheol synchronized release notes and oper-analytics documentation with the latest metrics. The work included updating visuals and localizations, which streamlined onboarding and improved cross-team collaboration. The depth of the updates addressed both technical accuracy and usability for a diverse developer audience.