vercel__chat/packages/state-memory

@chat-adapter/state-memory

In-memory state adapter for Chat SDK. For development and testing only — state is lost on restart.

Warning: Only use the memory adapter for local development and testing. State is lost on restart and locks don't work across multiple instances. For production, use @chat-adapter/state-redis, @chat-adapter/state-ioredis, or @chat-adapter/state-pg.

Installation

pnpm add @chat-adapter/state-memory

Usage

import { Chat } from "chat";
import { createMemoryState } from "@chat-adapter/state-memory";

const bot = new Chat({
  userName: "mybot",
  adapters: { /* ... */ },
  state: createMemoryState(),
});

No configuration options are needed.

Features

Feature	Supported
Persistence	No
Multi-instance	No
Subscriptions	Yes (in-memory)
Locking	Yes (single-process only)
Key-value caching	Yes (in-memory)
Zero configuration	Yes

Limitations

• Not suitable for production — state is lost on restart
• Single process only — locks don't work across multiple instances
• No persistence — subscriptions reset when the process restarts

When to use

• Local development
• Unit testing
• Quick prototyping

License

MIT