In January 2026, Jhan implemented property placeholder support for the HTTP Service Registry in the spring-projects/spring-framework repository. By leveraging Java and the Spring Framework, Jhan introduced dynamic URL resolution in @HttpExchange attributes through the use of EmbeddedValueResolverAware, allowing placeholders such as ${test.base.url} to be specified in service URLs. This approach enhanced environment-specific configuration flexibility and reduced the need for hard-coded values, supporting more robust deployment pipelines. The work demonstrated a solid understanding of Spring’s extensibility and unit testing practices, delivering a focused feature that improved configurability without introducing unnecessary complexity or changes to existing functionality.