Worked on improving SDK generation quality for the fern-api/fern repository by addressing the issue of unnecessary client classes being generated for subpackages without endpoints. Used C# and TypeScript to implement a recursive subPackageHasEndpoints check, ensuring that only subpackages containing actual endpoints resulted in client code. This approach reduced boilerplate and improved the maintainability of the generated SDK, streamlining the codebase for downstream developers. Focused on code refactoring and API development, the changes led to faster build times and a cleaner SDK structure, aligning generated code more closely with the underlying API and reducing maintenance overhead for SDK consumers.