During March 2025, this developer refactored the Python execution engine for the FoundationAgents/OpenManus repository, focusing on reliability and maintainability. They replaced threading with multiprocessing to create isolated execution environments, addressing shared-state risks and improving timeout and error handling. By leveraging Python’s multiprocessing capabilities and applying system programming and concurrency skills, they reduced the risk of race conditions and silent failures in multi-tenant and untrusted code scenarios. The new architecture enhanced error propagation and observability, enabling faster diagnosis and more stable user experiences. This work laid a foundation for future improvements through a cleaner concurrency model and clearer separation of concerns.