During May 2025, Blackcatain focused on improving code quality and reliability in the sbintuitions/flexeval repository. They addressed a logging inconsistency in the HuggingFaceLM class by standardizing the warning message, replacing the nonstandard 'warn' with 'warning' to align with Python logging best practices. This targeted bug fix enhanced observability and clarified potential configuration issues, making logs more actionable for future development and maintenance. The work involved careful code refactoring and demonstrated attention to detail, ensuring no regressions were introduced. Blackcatain’s contributions centered on Python development, emphasizing maintainability and laying a stable foundation for upcoming feature enhancements.