Worked on the openfoodfacts/openfoodfacts-server repository, focusing on enhancing documentation for product metadata and Nutriscore calculation logic. Applied Perl and YAML to clarify the timing and distinction between last_updated_t and last_modified_t fields, improving data interpretation for both API consumers and internal developers. Updated comments and documentation in Nutriscore.pm to support maintainability and onboarding, ensuring alignment with project standards without altering calculation behavior. Emphasized code refactoring and documentation skills to reduce ambiguity, support queries, and future maintenance risk. The work addressed specific schema and module clarity issues, contributing to a more robust and accessible codebase over a two-month period.