Ayush Jhawar contributed to the tscircuit/3d-viewer and tscircuit/props repositories by delivering targeted improvements in 3D visualization and circuit validation. He corrected the default camera position in the 3d-viewer, enhancing board rendering accuracy and improving the user experience. In tscircuit/props, he introduced the mustBeConnected property for pin attributes, enabling stricter validation of circuit designs. Ayush implemented comprehensive unit and integration tests in TypeScript to ensure robust parsing and behavior of the new property, reducing regression risk. His work demonstrated effective use of React, TypeScript, and testing methodologies, with a focus on maintainability and cross-repository collaboration.