During September 2025, gkdnjsvkvk contributed to the hoodong/2025-2-PLC repository by enhancing the Class Roster Documentation. They updated the 10조.md file to include a personal introduction and student ID for an existing roster entry, focusing on improving documentation clarity and data record-keeping. The work involved careful use of Markdown for structured documentation and Git for precise version control, ensuring no changes to application code or functionality. This documentation-only feature supported better onboarding and auditability for the project. The scope was limited to non-functional improvements, demonstrating attention to process quality and disciplined repository management over a one-month period.