During June 2025, Gksmfcksqls contributed to the spring-security and spring-boot repositories, focusing on backend security and stability. They enhanced JWT authentication by refactoring authority extraction in spring-security, defaulting to well-known claims and adding null-safety checks to prevent runtime errors. In spring-boot, they addressed a potential NullPointerException in data source initialization by introducing a driver null check, ensuring safer configuration handling. Their work, implemented in Java with Spring Boot and Spring Security, included expanded unit testing for edge cases. These contributions improved runtime safety, reduced configuration complexity, and strengthened the reliability of authentication and data source management workflows.