vercel__chat/packages/state-redis

@chat-adapter/state-redis

Redis state adapter for the chat SDK using the official redis package.

Installation

npm install chat @chat-adapter/state-redis redis

Usage

import { Chat } from "chat";
import { createRedisState } from "@chat-adapter/state-redis";

const chat = new Chat({
  userName: "mybot",
  adapters: { /* ... */ },
  state: createRedisState({
    url: process.env.REDIS_URL!,
  }),
});

Configuration

Option	Required	Description
url	Yes*	Redis connection URL
client	No	Existing redis client instance
keyPrefix	No	Prefix for all keys (default: "chat-sdk")

*Either url or client is required.

Using Connection URL

const state = createRedisState({
  url: "redis://localhost:6379",
});

Using Existing Client

import { createClient } from "redis";

const client = createClient({ url: "redis://localhost:6379" });
await client.connect();

const state = createRedisState({ client });

Features

• Thread subscriptions (persistent)
• Distributed locking (works across instances)
• Automatic reconnection
• Key prefix namespacing

Key Structure

{keyPrefix}:subscriptions     - SET of subscribed thread IDs
{keyPrefix}:lock:{threadId}   - Lock key with TTL

Production Recommendations

• Use Redis 6.0+ for best performance
• Enable Redis persistence (RDB or AOF)
• Use Redis Cluster for high availability
• Set appropriate memory limits

License

MIT