Worked on the snowflakedb/ArcticTraining repository, focusing on improving the reliability and maintainability of the command-line interface. Addressed a data consistency issue by updating cli.py to use attribute-style access for the last element in files.data, which reduced the risk of runtime errors and clarified data access semantics. The primary contribution involved fixing a bug related to CLI data access, ensuring more predictable behavior for users. Employed Python for CLI development, emphasizing code quality and future extensibility. No new features were released during this period, as the work centered on stability improvements and refining the existing codebase for better maintainability.