During December 2025, Andrew Yuan developed a Side Effects Summary feature for the temporalio/sdk-go repository, enhancing workflow traceability in the Temporal SDK UI and CLI. He implemented descriptive summaries for side effects and mutable side effects, allowing these to be displayed for improved clarity. Using Go and focusing on backend development and workflow orchestration, Andrew also strengthened the testing framework by introducing interceptor-based tests and refining integration tests. His work clarified experimental flag semantics and improved code quality through collaborative efforts. These contributions stabilized the codebase, facilitated faster debugging, and enhanced the overall developer experience within the Temporal ecosystem.