During this period, contributed to the spring-projects/spring-framework repository by developing a targeted test to validate multi-registrar bean registration within the Spring Framework. The work focused on ensuring that when multiple bean registrars are imported by a single configuration class, all beans defined through different registrars, such as Foo and Bar, are correctly registered. This feature enhanced the reliability of complex application configurations that depend on multiple registrars. The implementation leveraged Java and Kotlin, with an emphasis on testing and bean registration skills, and followed established protocols for issue tracking and commit sign-off to maintain project standards and traceability.