J.H. Choi developed two targeted features across the HKUDS/LightRAG and DS4SD/docling repositories, focusing on localization and error diagnostics. For LightRAG, Choi implemented Korean localization by updating language settings, localizing UI components, and refining the ko.json translation file, enabling broader accessibility for Korean users. In DS4SD/docling, Choi enhanced preprocessing error diagnostics by including page numbers in error messages and tightening exception handling, which streamlines debugging and improves reliability. The work leveraged React, TypeScript, and JSON, demonstrating attention to code style and maintainability. These contributions deepened the projects’ internationalization and robustness within a concise development period.