Nelly Mitnik contributed to the ReactionMechanismGenerator/RMG-database by improving data integrity in chemical kinetics modeling. She addressed a critical issue in reaction reversibility labeling for X2 and X3 in Konnov 2015 Table 2, ensuring these reactions were correctly marked as irreversible. Using Python and her expertise in reaction mechanism development, Nelly validated the changes against the chemical kinetics library to prevent downstream errors in mechanism generation and simulation workflows. Her work enhanced the reliability of published datasets and improved trust in simulation results, demonstrating careful attention to data validation and traceability within a specialized scientific software environment.