Worked on enhancing file system reliability in the apache/commons-io repository by addressing a critical bug in the CopyDirectoryVisitor component. Focused on ensuring that the fileFilter logic is properly evaluated during directory copy operations, the solution enabled selective copying and prevented both skipped and unintended files. This targeted fix, aligned with issue IO-875, improved data integrity for file operations and contributed to more predictable data handling workflows. Leveraged Java development skills, API refactoring, and unit testing to deliver a robust solution. The work demonstrated a methodical approach to debugging and open-source contribution, emphasizing correctness and maintainability in file system utilities.