Kader Fasid enhanced error handling in the ClipboardHealth/core-utils repository by developing a fromJsonApi converter for ServiceError, focusing on robust backend development and API integration using TypeScript. He implemented logic to transform JSON:API error objects into consistent ServiceError instances, addressing both minimal and complex error scenarios. Comprehensive unit tests were written to validate data integrity across various source field types, ensuring reliable error reporting for client applications. This work improved the consistency and reliability of error objects across services, reducing triage time for developers and supporting more transparent client-facing error messages. The depth of testing reflects careful attention to quality.