Worked on enhancing error handling in the TanStack/query repository by improving the persistQueryClientRestore function’s reliability. Developed a feature that ensures exceptions during client restoration or removal are rethrown rather than silently ignored, and introduced an optional onError callback to PersistQueryClientProvider for explicit error management. This approach, implemented using TypeScript and JavaScript, focused on front-end development and robust state management. The changes improved observability and enabled faster remediation of persistence-related issues by surfacing errors directly to consumers. Emphasized thorough testing and API design, resulting in clearer error pathways and more effective triage of issues related to persisted query state.