During October 2025, Egor Chikhlov contributed to the NNPDF/nnpdf repository by implementing a new YAML-based theory card to configure the NNPDF4.1 N3LO QCD QED theoretical setup. He focused on data configuration and management, ensuring that the new 41041000.yaml file enabled precise theory-model and dataset integration within the framework. Egor also addressed ID inconsistencies across configuration and theory card files, updating dataset and theory card identifiers to maintain cross-file consistency. His work improved data integrity and reproducibility in the NNPDF workflow, demonstrating careful attention to detail in managing complex scientific data using YAML and configuration management skills.