Worked on the langchain-ai/langsmith-sdk repository to address a critical memory management issue in the parent-child run hierarchy. Using JavaScript and front end development skills, implemented a targeted fix that ensures child_runs is cleared after postRun and patchRun, effectively preventing memory leaks during long-running execution graphs. This solution was reinforced by comprehensive tests to verify lifecycle correctness and guard against regressions. The approach maintained API stability and was validated through continuous integration, minimizing risk to production deployments. Documentation and explicit lifecycle handling were improved in the codebase, enhancing maintainability and observability while supporting reliable operation in production environments.