During January 2026, JK Dev focused on improving build hygiene and API consistency within the spring-projects/spring-security repository, specifically targeting the Spring Security CAS module. By leveraging Gradle and Java, JK Dev enforced compile warnings as errors, integrating a build plugin and removing existing compiler warnings to enhance build reliability and reduce the risk of issues reaching production. Additionally, they updated the CAS integration to align service properties with evolving configurations, ensuring ongoing compatibility. Their work included documenting these changes to support onboarding and release readiness, reflecting a methodical approach to quality and maintainability in Java and Spring Security environments.