Sanghoon worked on the msa-ez/platform repository, focusing on backend development and CI/CD improvements to enhance platform reliability and streamline developer onboarding. He upgraded the CI environment by updating Node.js to version 16 and integrating zod and zod-to-json-schema, preparing the build system for future features. Addressing authentication consistency, he standardized token key usage across the application, reducing potential issues with token retrieval. Additionally, Sanghoon improved onboarding documentation by clarifying OAuth2 app registration steps, including explicit application name input and example redirect URIs. His work, using JavaScript, YAML, and GitHub Actions, demonstrated thoughtful attention to operational clarity and maintainability.