Contributed to the pydantic/pydantic repository by developing a feature that enables conditional exclusion of computed fields during serialization. This work introduced the exclude_if parameter to the computed_field decorator, allowing selective omission of fields based on defined criteria. The approach focused on improving API response efficiency and supporting privacy compliance by reducing unnecessary payload data. Implementation involved backend development and data validation using Python and Pydantic, with careful attention to code quality and collaborative review. The feature was delivered through a co-authored pull request, reflecting a focus on maintainable, testable code and effective teamwork rather than bug fixing during the period.