Worked on the cloudnativedaysjp/cnd-handson repository to enhance documentation supporting CNDS2025 readiness, focusing on expanding CI/CD guidance and aligning terminology for improved onboarding. Leveraged Markdown and technical writing skills to introduce a new CI/CD documentation chapter, integrate GitOps practices with ArgoCD, and update repository visibility for better discoverability. The approach emphasized clarity and consistency, standardizing language across continuous delivery content and refining the hands-on summary for developers. No bugs were reported during this period, reflecting a focus on quality and accuracy in documentation rather than code changes. The work enabled faster adoption of CI/CD workflows within the project.