Worked on the redis/node-redis repository to enhance reliability and client experience by implementing a topology-resilience feature for Redis Sentinel, ensuring seed nodes are preserved as reconnection candidates during outages and topology changes. Addressed critical issues with client compatibility by aligning default RESP versions in RedisClientOptions, improving type safety and preventing configuration mismatches. Fixed loss of sharded Pub/Sub subscriptions during slot migrations by reattaching listeners based on cluster events, maintaining message delivery integrity. Expanded regression and integration testing using TypeScript and Node.js, with a focus on type safety and robust test coverage to ensure consistent behavior across Redis client variants.