During June 2025, Minjae Kim focused on enhancing documentation quality across the krafton-jungle/KJ-DS-BOOK-9-303 and krafton-jungle/KJ-ALGO-BOOK-9-303 repositories. Kim updated the Stack data structure documentation, applying Markdown blockquote formatting to align with the team’s style guide and improve readability. In the Heap Sort documentation, Kim clarified the heapify operation by adding a precise definition and explaining its role in maintaining heap properties, supporting better learner onboarding. The work emphasized documentation consistency and maintainability, with no code changes or bug fixes. Kim’s efforts centered on Markdown proficiency and documentation best practices, reducing future support needs through clearer technical writing.