Worked on enhancing the robustness of EDF handling within the wundergraph/cosmo repository by focusing on input validation and error prevention. Addressed a bug related to EDF arguments validation, ensuring that all inputs conform to required formats and expected patterns. Utilized JavaScript and Node.js to implement a validation layer that intercepts malformed inputs early in the processing pipeline, thereby reducing the risk of downstream errors. This approach improved the reliability of the system by enabling prompt error detection and handling. The work emphasized validation techniques, contributing to a more stable codebase and supporting maintainability for future development in the repository.