During November 2024, Silkair1234 developed structured documentation for Effective Java Chapter 7, focusing on lambdas and streams, within the techeer-sv/2024-Team-Joe-backend-study repository. Using Markdown, they centralized learning materials and provided a Notion study page link to support team onboarding and knowledge transfer. Their work included repository hygiene improvements by identifying and removing a duplicate filename in the SangJin directory, then renaming files for clarity and maintainability. The technical approach emphasized clear documentation practices and careful file management, resulting in a more organized backend study resource. The depth of work was focused, addressing onboarding and maintainability challenges directly.