Worked on restructuring the Evaluation module within the vellum-ai/vellum-python-sdks repository, focusing on improving code organization and maintainability. The primary effort involved renaming the 'lib' directory to 'evaluations', updating all internal module references, and ensuring that external API behavior remained unchanged. This refactoring, implemented using Python and JSON, also included updating the associated notebook example to reflect the new directory structure. The changes aimed to reduce technical debt, streamline onboarding for new contributors, and enable faster future enhancements. No bugs were addressed during this period, and all modifications were non-breaking, emphasizing careful code organization and refactoring practices.