Worked on the pymc-labs/pymc-marketing repository to streamline and modernize the marketing API by refactoring and deprecating outdated methods. Focused on consolidating related API functionality, the developer used Python to remove legacy endpoints such as clv_summary and expected_num_purchases, aligning the codebase with current best practices. This API cleanup reduced maintenance overhead and improved long-term stability, while formalizing deprecation processes to support future versioning. Emphasizing software maintenance and code deprecation, the changes established a cleaner, more maintainable API surface, making it easier for both users and developers to adopt new features and contribute to ongoing project enhancements.