Hong contributed backend development and build management expertise across two repositories over a two-month period. For misskey-dev/misskey, Hong developed the MFMService Ruby Tag Rendering feature, enabling accurate parsing and rendering of HTML ruby tags—including base text and pronunciation annotations—into the MFM format. This involved implementing robust unit tests and updating backend logic to support complete HTML-to-MFM translation, improving content fidelity and typographic consistency. In ScoopInstaller/Main, Hong updated the Fedify tool to version 1.4.1, revising configuration and documentation to maintain compatibility. The work demonstrated proficiency in JavaScript, TypeScript, and version control, with a focus on maintainability and correctness.