During November 2025, Sandy Maguire focused on backend development in Haskell, addressing a targeted bug in the IntersectMBO/ouroboros-network repository. Sandy corrected the ToJSON serialization for the DiffusionMode type, ensuring its JSON output matched the expected topology file syntax. This change improved the interoperability and reliability of topology loading by eliminating discrepancies in how different diffusion modes were represented. The patch was isolated, low-risk, and included a clear audit trail for future maintenance. Sandy’s work demonstrated careful attention to data correctness and serialization consistency, leveraging expertise in Haskell and backend systems to enhance the robustness of network configuration handling.