Worked on theopenco/llmgateway to streamline historical data access by removing minute-level time window granularity and standardizing analytics to hourly or longer intervals. This involved updating backend API types, database mappings, and pruning related schemas to enforce the new granularity, all implemented using TypeScript and full stack development skills. The developer regenerated OpenAPI specifications to maintain contract consistency and updated documentation and release notes to communicate changes. These efforts reduced query complexity and improved UI consistency across dashboards, laying the groundwork for scalable historical analytics. The work focused on API development and backend improvements without introducing new bug fixes during the period.