During July 2025, Tom Hennigan focused on improving the stability and correctness of array sharding in the google/orbax repository. He addressed a bug in the create_sharded_array utility, ensuring that scalar inputs such as integers and floats are now handled consistently with non-scalar cases by applying an empty PartitionSpec. This technical approach improved data correctness and test reproducibility, particularly in scenarios involving scalar sharding. Tom also enhanced the test utilities to generate valid scalar sharding, which reduced flaky tests and strengthened the overall test harness. His work primarily involved Python and emphasized robust testing and utility development for reliable outcomes.