Worked on the apache/commons-io repository, focusing on improving the reliability of the PathUtils utility in Java. Addressed a subtle but critical bug in string manipulation by replacing the use of replaceAll with replace, thereby eliminating unintended regular expression side effects during path handling. This targeted fix enhanced the stability and correctness of IO utilities for downstream consumers, ensuring safer and more predictable string operations. The contribution maintained alignment with established project conventions and delivered a precise patch that resolved a correctness issue without introducing unnecessary complexity. Demonstrated expertise in Java and string manipulation while prioritizing maintainability and code quality.