In April 2026, YM Lei developed live device failure diagnostics for the jax-ml/jax repository, introducing a custom ProcessFailureError exception in Python to surface failed process IDs during live device operations. By enhancing error management and exception handling, YM Lei enabled more precise error reporting and streamlined troubleshooting for production workflows. The solution integrated robust error handling patterns and improved observability within existing live device APIs, allowing for faster diagnosis and targeted remediation of failures. This focused engineering effort addressed fault isolation and stability, demonstrating depth in Python programming and careful integration with live device systems to support reliable operations.