During September 2025, Byun Yoonjae contributed to the hoodong/2025-2-PLC repository by enhancing project documentation to improve contributor transparency and governance. Byun added a new contributor entry for 변윤재 in the 4조.md file, including relevant academic information, and ensured the update was precisely tracked using Git. The work focused on Markdown-based documentation, emphasizing clarity and auditability for future collaborators. No bugs were addressed during this period, as the primary goal was to strengthen onboarding and project governance. Byun’s efforts demonstrated attention to documentation integrity and effective use of Git workflows, supporting open-source collaboration practices within the project.