Worked on improving the reliability of relay-style pagination in the ardatan/graphql-tools repository by addressing a bug in the hasNextPage logic within the pagination mock. Focused on backend development using TypeScript and JavaScript, the approach involved correcting the calculation to ensure accurate reflection of subsequent data availability for downstream clients. To prevent future regressions, a dedicated test case was added, enhancing overall test coverage and code quality. This targeted fix supports more robust data boundary handling in GraphQL tooling, emphasizing careful attention to reliability and maintainability. The work demonstrates a methodical approach to backend bug resolution and automated testing practices.