Worked on enhancing the LangCache API within the redis/docs repository by updating its OpenAPI specification to introduce new error responses and enforce stricter schema validation. Focused on improving API reliability, the work added explicit Not Found (404) and Failed Dependency (424) error types, enabling clearer incident diagnosis and more predictable client behavior. Leveraged skills in API design and OpenAPI Specification, primarily using YAML to define and refine schema rules for both request parameters and response fields. This effort strengthened data integrity and laid the foundation for more robust API interactions, reflecting a methodical approach to specification-driven API development.