Worked on enhancing IP address handling within the spring-projects/spring-security repository, focusing on improving security tooling and operational debugging. Developed a human-readable string representation for the IpAddressMatcher component, allowing clearer visibility into IP addresses and subnet masks used in access decisions. Leveraged Java and Spring Security to implement this feature, and introduced comprehensive unit tests covering both CIDR notation and plain IP addresses. This approach increased test coverage and reduced the risk of regressions, while also strengthening maintainability. The work directly addressed operational troubleshooting needs, aligning with security best practices and improving the reliability of IP-based access control mechanisms.