During February 2025, Jimmy Che focused on improving error handling robustness in the awslabs/iot-app-kit repository. He addressed a critical issue where missing error metadata could cause application crashes by implementing an optional check for the httpStatusCode property within error objects. This change ensured that the library would degrade gracefully when $metadata was absent, reducing the risk of production failures. Jimmy validated the solution through targeted tests and code review, emphasizing defensive programming practices. His work leveraged TypeScript and API integration skills, resulting in a safer error path and laying the foundation for more resilient error handling across the codebase.