During January 2026, Jiawei X worked on the jax-ml/jax repository, focusing on stabilizing the JAX export path. Addressing instability introduced by explicit sharding, Jiawei reverted this feature, removing named sharding and partition specifications to restore a simpler export mechanism. This targeted bug fix ensured that all existing regression tests continued to pass, maintaining compatibility with downstream production workflows and external integrations. By prioritizing stability and risk mitigation, Jiawei preserved the business value of model export features. The work demonstrated depth in data processing, machine learning, and Python, with careful attention to maintaining reliability in complex export pipelines.