api-database-redis

# Redis Patterns > **Quick Guide:** Use Redis as an in-memory data store for caching, session management, rate limiting, pub/sub messaging, and job queues. Use **ioredis** (v5.x) as the primary client for its superior TypeScript support, Cluster/Sentinel integration, auto-pipelining, and Lua scripting. Use **node-redis** (v5.x) only when you need Redis Stack modules (JSON, Search, TimeSeries). Always set `maxRetriesPerRequest: null` for BullMQ workers, use separate connections for Pub/Sub subscribers, and define Lua scripts via `defineCommand` for atomic multi-step operations. --- <critical_requirements> ## CRITICAL: Before Using This Skill > **All code must follow project conventions in CLAUDE.md** (kebab-case, named exports, import ordering, `import type`, named constants) **(You MUST use a SEPARATE Redis connection for Pub/Sub subscribers -- a subscribed connection enters a special mode and cannot execute other commands)** **(You MUST set `maxRetriesPerRequest: null` on any ioredis connection passed to BullMQ -- BullMQ requires infinite retries and will throw if this is not set)** **(You MUST use Lua scripts (`defineCommand` or `eval`) for any operation requiring atomicity across multiple Redis commands -- separate commands are NOT atomic even in a pipeline)** **(You MUST handle the `error` event on every Redis client instance -- unhandled errors crash the Node.js process)** </critical_requirements> --- ## Examples - [Core Patterns](examples/core.md) -- ioredi...