Worked on enhancing the reliability of Probabilistic History Matching workflows within the ESSS/alfasim-sdk repository by addressing a critical bug in the results reader. Focused on ensuring correct data shape handling for HM result structures, the work improved the accuracy and stability of simulation output processing. Utilized Python and testing skills to validate the fix, supporting robust downstream analytics and reducing the risk of incorrect HM analyses. The solution was documented with clear commit messaging to aid traceability and maintainability. This targeted bug fix contributed to the overall stability of the HM data pipeline, emphasizing careful data reading and validation practices.