Ethan Wu enhanced type safety and dependency stability across core repositories, focusing on Storybook and typescript-eslint. In Storybook, he refactored configuration files using TypeScript’s literal types and the as const assertion, improving predictability and reducing runtime errors in addon interactions and CSF strict mode. For typescript-eslint, Ethan resolved missing ESLint peer dependencies in yarn.lock, ensuring reliable dependency resolution and preventing build-time issues. His work demonstrated strong skills in TypeScript, configuration management, and package management, resulting in more robust onboarding and development workflows. The depth of his contributions addressed both code correctness and long-term maintainability within these projects.