During November 2024, Pawel Baran focused on enhancing data integrity within the BHoM/BHoM repository by enforcing immutability on the RequirementResults data structure. He replaced the mutable List with a ReadOnlyCollection and updated the constructor to ensure correct initialization, thereby preventing any modification after object creation. This approach, implemented in C# and leveraging .NET collection patterns, strengthened the API contract and reduced the risk of runtime mutation bugs. Pawel’s work addressed thread-safety concerns in multi-threaded environments and simplified state management, reflecting a thoughtful application of API design and software development principles to improve maintainability and reliability.