In December 2024, Graham Bowyer refactored the dynamic mocks layer in the grafbase/grafbase repository to streamline the handling of federated GraphQL entity resolvers. By updating the DynamicSchemaBuilder to directly accept entity resolvers and revising the _entities resolution to iterate through these resolvers, he reduced boilerplate and improved maintainability. This approach simplified the process of mocking federated entities, making it easier for contributors to onboard and iterate on federated schemas. Working primarily with Rust and leveraging skills in API mocking and federation, Graham’s work enhanced the flexibility and safety of testing federated graphs while improving code readability and contributor experience.