Worked on the jd-opensource/OxyGent repository to enhance reliability and performance in core backend tooling, focusing on data retrieval workflows. Addressed two critical bugs by refactoring parameter handling in Python functions, introducing robust validation for required parameters and improving time-related logic with Pydantic. Optimized Elasticsearch queries by simplifying search logic and reducing fetch size, which improved node information retrieval speed and reduced query overhead. No new user-facing features were added during this period, as the work concentrated on strengthening foundational code quality and maintainability, laying the groundwork for future extensibility and more reliable production scaling in backend systems.