Worked on enhancing the container lifecycle management within the cloudflare/workerd repository, focusing on backend development and system programming using C++. Addressed a specific issue in the Container Stop API by correcting the success status code from 200 to 204, ensuring the API response aligns with expected HTTP semantics. Improved error handling was implemented to provide clearer feedback when attempting to stop a container that is not running, reducing ambiguity for client integrations and automation scripts. This targeted bug fix strengthened the reliability and contract adherence of the API, contributing to more predictable and robust production deployments in containerized environments.