Worked on the ignaciosica/tinygrad repository to improve runtime stability in HCQGraph, focusing on robust handling of device variables during graph execution. Addressed a bug related to the core_id runtime variable, ensuring correct management across multiple graph runs and preventing merge conflicts in successive executions. Enhanced the reliability of TinyJIT-backed behavior by expanding unit test coverage, reinforcing regression safety and runtime robustness. Utilized Python for backend development, applying expertise in JIT compilation and graph algorithms to strengthen the system’s execution layer. The work emphasized careful bug resolution and comprehensive testing to maintain stability in complex runtime graph scenarios.