During June 2025, James Bambrick enhanced variable handling in the JAX ecosystem by implementing stability-focused changes across the jax-ml/jax and ROCm/jax repositories. He introduced gensym-based variable suffixing in jax-ml/jax, reverting a previous Var class modification to ensure reliable identification of JAXPR variables. In ROCm/jax, he restored correct variable handling by reverting related Var class changes, addressing edge-case failures during JAX transformations and partial evaluation. Working primarily in Python and leveraging expertise in compiler internals and debugging, James improved the robustness and maintainability of JAXPR variable management, ensuring consistent behavior and traceability across both repositories.