Worked on the moltbot/moltbot repository to enhance the reliability of backend tool execution by addressing error handling and memory management concerns. Introduced best-effort guards around tool event callbacks, specifically targeting onExecutionPhase and per-run onAgentEvent, to prevent unhandled exceptions and potential memory leaks during execution phases. This update, implemented in TypeScript, was supported by comprehensive regression tests that validated behavior when callbacks threw errors or rejected promises. The work improved runtime stability, increased test reliability, and ensured safer error handling, contributing to the maintainability and future-proofing of the tool execution pipeline through careful isolation of failure paths.