During February 2025, Hyeonkyu Nam developed and delivered a suite of algorithmic problem solutions and educational enhancements across the havuruta/2025-Feb-PS, havuruta/2025-CS-OS, and havuruta/2025-CS-Network repositories. He implemented Java-based solutions for string manipulation, number theory, and combinatorial problems, introducing utility scripts to standardize code structure and improve maintainability. Hyeonkyu also expanded CPU and networking learning materials by adding Q&A self-assessment sections and clarifying documentation, supporting both technical accuracy and learner engagement. His work demonstrated depth in algorithm design, data structures, and technical writing, resulting in six new features that strengthened both code quality and educational content.