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letta

(★ 24,331)

Platform for stateful agents: AI with advanced memory that can learn and self-improve over time.

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Download Latest Version (.zip)

- - config.yml
AGENTS.md
CITATION.cff
CONTRIBUTING.md
LICENSE
PRIVACY.md
README.md
SECURITY.md
TERMS.md

🚀 Installation Guide

1. Get the code

git clone https://github.com/letta-ai/letta

Downloads the entire project code from GitHub to your computer.

cd letta

Moves into the project folder you just downloaded.

2. Official Install Script

Easy Recommended

Prerequisites

Node.js Node.js must be installed to use npm.

npm install -g @letta-ai/letta-code

Installs the package published on the npm registry globally — no need to clone the source.

✅ After installing, open a new terminal and run the program's version command (e.g. --version) to confirm it worked.

Pulled directly from this repo's README.

// repository documentation

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# Letta

Build stateful agents with memory that can learn and improve over time.

Letta (f.k.a. MemGPT) is actively developed. The current source code lives in [`letta-ai/letta-code`](https://github.com/letta-ai/letta-code), which includes the agent harness, interactive terminal UI, App Server, channels, and the runtime used by the desktop and web apps.

> [!NOTE]
> This repository now serves as a landing page for the Letta project. The retired Letta V1 server source is preserved on the [`archive`](https://github.com/letta-ai/letta/tree/archive) branch for historical reference.

## Get started

Install Letta from npm:

```bash
npm install -g @letta-ai/letta-code
```

Launch the interactive terminal UI:

```bash
letta
```

Run the App Server for local or self-hosted agents:

```bash
letta server
```

You can also use Letta through:

- the [desktop app](https://docs.letta.com/letta-code/desktop-app) for macOS, Windows, and Linux
- [chat.letta.com](https://chat.letta.com) in your browser, including on mobile
- [Slack, Telegram, Discord, and custom channels](https://docs.letta.com/letta-code/channels)
- the [Letta Agent SDK](https://docs.letta.com/letta-agent-sdk/overview) for building agents into TypeScript applications
- [Letta Cloud](https://github.com/letta-ai/letta-code#letta-cloud) for keeping agent memory, identity, and conversations available across computers

See the [`letta-ai/letta-code`](https://github.com/letta-ai/letta-code) README and the [Letta documentation](https://docs.letta.com) for current installation, development, and deployment instructions.

## Historical source

The [`archive`](https://github.com/letta-ai/letta/tree/archive) branch contains the retired Letta V1 API server as it existed when this repository was archived. Existing tags and releases remain available for reproducibility. That source is unsupported, receives no fixes or security updates, and should not be used in production.