Letta Code CLI

Letta Code is a memory-first agent that can run from your terminal. The CLI supports both Letta Cloud agents and Local mode.

Install the Letta Code CLI

Requires Node.js 18+

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

Getting started

1. Install Letta Code

   Run the following command to install Letta Code via your terminal (requires Node.js version 18+):

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

   To launch Letta Code, run:

   letta

   If you’re running Letta Code for the first time, a new local agent will be auto-created for you. This default local mode stores agent state on your machine and does not require a Letta login.

2. Connect to LLM providers

   Use /connect to connect external API keys, coding plans, and local inference servers.

3. Navigate to your project

   cd your-project
   letta

4. Send your first message

   You’re ready to chat! Try asking your agent to explore your codebase or run /init to bootstrap its memory.

   Use /new to start a new conversation (or letta --new), /resume to swap conversations, /agent to swap agents, and /model to swap models. View the CLI reference to see the full list of CLI commands.

5. Optional: login to Constellation

   Run /login if you want Constellation-managed state and access from chat.letta.com, the desktop app, other machines, and messaging integrations.

   Read more about Constellation here.