During August 2025, Gomibushi developed comprehensive production environment documentation for the ATIL tenant within the nais/doc repository. Focusing on Markdown and leveraging strong documentation skills, Gomibushi detailed critical aspects such as domains, external IPs, and observability settings to accurately reflect the production configuration. This work established a central reference point that supports deployment reliability and streamlines onboarding for new team members. By anchoring the documentation to the production readiness workflow, Gomibushi improved cross-team support and clarified operational requirements. The depth of the documentation ensures that teams can confidently manage and maintain the ATIL production environment with clear, accessible guidance.