During June 2025, Blcksrx developed a feature for the apache/hadoop repository, focusing on the S3A magic committer. They introduced an optional cleanup configuration that allows users to disable automatic deletion of staging directories after job completion, addressing performance bottlenecks in large-scale distributed jobs. The implementation involved Java and leveraged AWS S3, with careful attention to configuration management and system stability. Blcksrx provided comprehensive documentation updates and targeted tests to ensure the new behavior integrates smoothly with existing workflows. This work demonstrated a deep understanding of distributed systems and contributed measurable business value by optimizing resource management for Hadoop users.