Letta Code

Letta Code

[](https://www.npmjs.com/package/@letta-ai/letta-code) [](https://discord.gg/letta)

Letta Code is a memory-first coding harness, designed for long-lived agents that can learn from experience.

Instead of working in independent sessions, you work with a persisted agent whose memory is portable across models (Claude, GPT, Gemini, GLM, Kimi, and more).

Run Letta Code in the [**CLI**](https://docs.letta.com/letta-code/cli), or download the [**desktop app**](https://docs.letta.com/letta-code/desktop-app) for MacOS, Windows, and Linux. You can also access Letta Code via [your phone](https://docs.letta.com/letta-code/remote-mobile) and [Slack/Telegram/Discord](https://docs.letta.com/letta-code/channels).


Get started

Install the package via [npm](https://docs.npmjs.com/downloading-and-installing-node-js-and-npm):

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

Navigate to your project directory and run `letta` (see various command-line options [on the docs](https://docs.letta.com/letta-code/commands)).

Run `/connect` to configure your own LLM API keys (OpenAI / ChatGPT, Anthropic, zAI coding plan, etc.), and use `/model` to swap models.

You can also download the [**desktop app**](https://docs.letta.com/letta-code/desktop-app) for MacOS, Windows, and Linux. Agents created in the CLI are available via the desktop app, and vice versa.

Philosophy

Letta Code is built around long-lived agents that persist across sessions and improve with use. Rather than working in independent sessions, each session is tied to a persisted agent that learns.

**Claude Code / Codex / Gemini CLI** (Session-Based)

• Sessions are independent
• No learning between sessions
• Context = messages in the current session + AGENTS.md