Worked on stabilizing the live query subsystem in TanStack/db by addressing a complex edge case involving graph finalization and garbage collection. Focused on backend development and database management using TypeScript, the work involved debugging and resolving errors where live queries would fail after collection garbage collection due to reuse of finalized graphs. The solution implemented explicit cache resets for graph, inputs, pipeline, and collectionWhereClauses when a live query subscription was unsubscribed and the collection was garbage collected. This approach ensured that subsequent live query executions compiled a fresh graph, improving the reliability and lifecycle management of real-time data features.