Worked on the bevyengine/bevy repository to deliver an extensible hit data pathway for the Bevy picking system, focusing on backend-agnostic design and cross-platform stability. Developed a Custom HitData extension that allows backend-specific data, such as triangle vertices, to be attached without altering the core HitData type. This approach used Rust programming and 3D graphics expertise to implement an extra field with Arc storage and a supporting trait, ensuring flexibility for various picking scenarios. The work included comprehensive testing on Ubuntu and WebAssembly, along with an end-to-end example, resulting in stable, extensible hit data handling across multiple backends.