During September 2025, Alex Shackleton developed Single-Write Multiple-Read (SWMR) functionality for the Smalldata module in the slac-lcls/lcls2 repository. Using Python and leveraging HDF5 for data storage, Alex implemented a concurrency solution that enables simultaneous data writing and reading, with SWMR mode activating after the initial dataset creation to ensure correct initialization. This approach improved real-time data handling and reduced contention between readers and writers, directly supporting scalable and safer data pipelines for live experiments. The work demonstrated a focused application of concurrency and data handling skills, delivering a robust feature that addresses critical workflow requirements in scientific environments.