Worked on the meilisearch/meilisearch repository, focusing on refining internal error handling within the meilisearch-types crate. The primary contribution involved removing the CouldNotUpgrade variant from the ErrorCode enum, a targeted change aimed at reducing the API surface area and simplifying downstream error management. This adjustment did not introduce new user-facing features but improved maintainability and minimized the risk of runtime errors related to invalid enum variants. The work was implemented using Rust, leveraging skills in error handling and codebase refactoring. These changes support ongoing efforts to future-proof the project and streamline future upgrades without altering existing user behavior.