Worked on enhancing error handling for large JSON payloads in the alibaba/fastjson2 repository, focusing on improving robustness and developer experience. Introduced a dedicated JSONLargeObjectException in Java to replace generic OutOfMemoryError scenarios, providing more precise diagnostics and actionable guidance for users encountering size limit issues. The implementation included detailed error messages that report both the requested and maximum allowed sizes, and direct users to enable the LargeObject feature when appropriate. Leveraged skills in exception handling and JSON serialization to strengthen error semantics, reduce debugging time for integration partners, and align the codebase with broader stability and maintainability goals.