During June 2025, this developer focused on enhancing documentation for core data structures and algorithms in the krafton-jungle/KJ-DS-BOOK-9-303 and krafton-jungle/KJ-ALGO-BOOK-9-303 repositories. They consolidated and expanded materials on Balanced BSTs, AVL Trees, and Red-Black Trees, providing new Markdown files, Python code examples, and visual aids to clarify complex concepts. For Dijkstra’s algorithm, they revised summaries, added GIF-based illustrations, and aligned terminology for greater clarity. Their work emphasized technical writing, Python programming, and algorithm explanation, resulting in improved onboarding, reduced support needs, and a more consistent, accessible knowledge base for users and contributors.