Worked on enhancing error handling within the fastly/js-compute-runtime repository by delivering a unified mapping from FastlyStatus to KVStoreError, aligning the JavaScript SDK’s error reporting with that of the Rust SDK. This feature introduced new error cases and more detailed, actionable messages, improving both debugging and user feedback for KVStore integrations. The approach focused on cross-language consistency, enabling developers to diagnose issues more efficiently and reducing support overhead. Leveraged skills in API development, C++ development, and error handling to ensure high code quality and maintainability, while collaborating across language boundaries to strengthen reliability and developer experience in the runtime environment.