Worked on the microsoft/rushstack repository to enhance the stability and compatibility of the api-extractor tool by upgrading its bundled TypeScript version to 5.7. Focused on resolving breaking changes and reducing type-related warnings, the work aligned api-extractor with the latest Node.js type definitions and TypeScript features. This technical approach improved downstream compatibility and ensured safer integrations for developers relying on the Rushstack toolchain. Utilized TypeScript, YAML, and package management skills to address a key bug, contributing to a more maintainable and modern build environment. The update supported the ongoing roadmap to keep Rushstack current and developer-friendly for future releases.