During December 2025, work focused on stabilizing JSON serialization within the OctopusDeploy/go-octopusdeploy repository by addressing a bug in the Git Persistence Settings component. The developer removed the ConversionState field from the MarshalJSON method, ensuring it is treated as a read-only internal value and no longer exposed in external JSON outputs. This adjustment improved the API contract’s stability and enhanced data security, though it introduced a potential breaking change for consumers expecting ConversionState in serialized data. The solution was implemented in Go, with additional regression tests added to verify the exclusion of ConversionState, demonstrating skills in backend and API development.