Build stateful agents with long-term memory using Letta

Use Letta to create agents whose identity, tools, memory blocks, and conversation state persist across sessions for long-running assistant or application workflows.

Prerequisites

Node.js 18+ for Letta Code or API credentials/SDKs for application integration; selected model provider

Installation

Use the upstream install or setup path that matches your environment:

• npm install @letta-ai/letta-client
• pip install letta-client

Requirements and caveats from upstream:

• Requires Node.js 18+
• Letta has a full-featured agents API, and a Python and Typescript SDK (view our API reference).
• TypeScript / Node.js:

Basic usage or getting-started notes:

• Letta Code: run agents locally in your terminal

• Run letta in your terminal to launch an agent with memory running on your local computer

• bash

• Source: https://github.com/letta-ai/letta

• Extracted from upstream docs: https://raw.githubusercontent.com/letta-ai/letta/HEAD/README.md

Documentation

• https://docs.letta.com/

Source

• Agent Skill Exchange