In January 2025, M. Novikov enhanced the reliability of GraphQL subscriptions in the microsoft/graphitation repository by focusing on robust error handling and improved type safety. Novikov implemented comprehensive end-to-end tests to verify correct subscription behavior when errors occur mid-stream, introducing snapshot testing to prevent regressions. The work included a type-safety refactor of resolver definitions across the GraphQL schema, leveraging TypeScript to enforce stricter type guarantees. By expanding test execution logic to cover error scenarios during active subscriptions, Novikov reduced the risk of silent failures and contributed to the maintainability and resilience of the GraphQL layer within the project.