Worked on updating the Green-score API documentation and related assets in the openfoodfacts/openfoodfacts-server repository to support an expanded grade set, introducing the new 'F' grade alongside existing values. Focused on enhancing clarity for API consumers, the work involved revising Markdown-based documentation and updating visual asset references to accurately represent the full range of ecoscore_grade values from A to F, including 'A+'. This documentation-focused contribution addressed issue #11919, ensuring that developers and stakeholders have clear, up-to-date information. The approach emphasized precision in technical writing and asset management, supporting better integration and reducing ambiguity for downstream users of the API.