During February 2025, contributed to the instabase/aihub-openapi repository by designing and delivering a Batch Files Listing API that supports pagination, enabling users to efficiently retrieve files within a batch. Focused on API design and development using YAML and the OpenAPI Specification, the work included updating the specification to introduce page_size and start_token parameters, refining example responses, and enhancing documentation for improved developer onboarding. Emphasized maintainability by refactoring parameter handling, clarifying response structures, and streamlining inline documentation. The approach prioritized reliability and scalability, laying groundwork for future batch operations and integrations while maintaining clear code traceability and quality throughout the process.