During July 2025, Seonghyeon Chae focused on improving the quality and maintainability of the spring-projects/spring-boot repository, specifically within the Health and Actuator modules. He addressed a terminology inconsistency by correcting the misspelling of 'initial' across multiple test files and core health registry implementations. Using Java and Spring Boot, he standardized health-related terminology to align with official documentation, which enhanced API clarity and reduced the risk of developer confusion. Although no new user-facing features were introduced, his work improved test reliability and contributed to a cleaner, more maintainable codebase, supporting smoother onboarding and ongoing development efforts.