Worked on stabilizing the Metal backend in the tinygrad/tinygrad repository by addressing a memory management issue that previously caused Metal buffers to persist after deallocation. Implemented a fix in Python and Objective-C to ensure the MetalAllocator properly calls release() on underlying Metal buffers, preventing memory leaks during tensor operations. Added targeted unit tests to verify correct buffer deallocation and guard against future regressions, demonstrating a test-driven approach. Focused on backend development and GPU programming, the work improved the reliability of the Metal path and contributed to more robust memory management practices within the codebase, enhancing overall backend stability and maintainability.