Emily Fischer enhanced the dotnet/project-system repository by improving accessibility and extensibility within the Visual Studio Project System. She addressed a UI accessibility issue in the launch.json interface by adjusting access modifiers in the Query.PropertyPages namespace, enabling external integrations and proper UI behavior. Emily also designed and implemented a new public API surface for project querying, state management, and configuration introspection, laying groundwork for future extensible tooling. Her work demonstrated disciplined API design and careful incremental delivery, using C# and leveraging skills in API design and IDE integration. These contributions improved both immediate usability and long-term maintainability of the project system.