Over a two-month period, contributed to core improvements in GraphQL tooling by delivering targeted enhancements and fixes across two repositories. In ardatan/graphql-mesh, addressed a critical issue in bare mode resolver handling for NamingConvention and Prefix transforms, using TypeScript and code refactoring to ensure correct mapping and prevent prefix duplication when types are extended, thereby increasing reliability in configuration-driven deployments. Later, in kamilkisiela/graphql-hive, implemented Document ID validation and error handling for persisted documents within the JS SDK, leveraging full stack development skills to enforce correct ID formats, improve data integrity, and provide actionable error reporting for developers working with persisted data.