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@letta-ai

Letta

Letta is an AI lab building machines that learn
README.md

Hello World 👾

Letta Logo

Letta is an AI lab building machines that learn: persistent agents with the ability to continuously learn and adapt from their own experience.

Try Letta Code, the memory-first agent:

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

# then navigate to a project directory, and run `letta`
cd my-project
letta

Useful links:

Made with 💜 by our team in San Francisco (join us!) and over 100 individual contributors from around the world.

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  1. letta-code letta-code Public

    Agents that self-improve with experience

    TypeScript 3.7k 454

  2. letta-agent-sdk letta-agent-sdk Public

    The Letta Agent SDK is the SDK for stateful agents. Each agent has its own identity and long-term memory, and keeps both across conversations, models, and the computers it runs on.

    TypeScript 112 26

  3. letta-oss-ui letta-oss-ui Public

    An open-source demo UI built on top of the Letta Agent SDK

    TypeScript 90 26

  4. skills skills Public

    A shared repository for skills. Intended to be used with Letta Code, Claude Code, Codex CLI, and other agents that support skills.

    Python 152 34

  5. agent-file agent-file Public

    Agent File (.af): An open file format for serializing stateful AI agents with persistent memory and behavior. Share, checkpoint, and version control agents across compatible frameworks.

    TypeScript 1.2k 119

  6. trajectory trajectory Public

    Convert sessions across harnesses to a unified trajectory format - designed to be consumed by agents (e.g. for memory formation, dreaming, search)

    TypeScript 282 26

Repositories

Showing 10 of 63 repositories
  • letta-code Public

    Agents that self-improve with experience

    letta-ai/letta-code's past year of commit activity
    TypeScript 3,736 Apache-2.0 454 192 117 Updated Oct 29, 2026
  • letta-evals Public

    Evaluation kit for testing stateful agents

    letta-ai/letta-evals's past year of commit activity
    Python 82 Apache-2.0 14 2 3 Updated Oct 29, 2026
  • letta-computer-deployment Public

    Deploy an always-on computer connected to Letta Cloud

    letta-ai/letta-computer-deployment's past year of commit activity
    Shell 19 16 0 2 Updated Oct 29, 2026
  • letta-agent-sdk Public

    The Letta Agent SDK is the SDK for stateful agents. Each agent has its own identity and long-term memory, and keeps both across conversations, models, and the computers it runs on.

    letta-ai/letta-agent-sdk's past year of commit activity
    TypeScript 112 Apache-2.0 26 16 12 Updated Oct 29, 2026
  • agentenv-framework Public Forked from scaleapi/agentenv-framework

    Creating realistic RL environments requires collaboration between researchers, engineers, and domain experts across many dimensions: artifacts, environments tools, dynamism of the environment, reproducibility, and more. There is no open source framework for building these environments effectively. Until now.

    letta-ai/agentenv-framework's past year of commit activity
    Python 1 Apache-2.0 48 0 0 Updated Oct 28, 2026
  • letta-acp Public

    ACP (Agent Client Protocol) adapter for Letta — use stateful Letta agents from Zed and other ACP clients

    letta-ai/letta-acp's past year of commit activity
    TypeScript 12 Apache-2.0 9 6 6 Updated Oct 28, 2026
  • letta-python Public

    A Python SDK for accessing the Letta API

    letta-ai/letta-python's past year of commit activity
    Python 55 Apache-2.0 18 3 5 Updated Oct 27, 2026
  • letta-node Public

    A TypeScript SDK for accessing the Letta API

    letta-ai/letta-node's past year of commit activity
    TypeScript 48 Apache-2.0 15 2 2 Updated Oct 27, 2026
  • frontiermemory Public

    FrontierMemory: benchmarking continual learning through memory

    letta-ai/frontiermemory's past year of commit activity
    Python 25 Apache-2.0 1 0 1 Updated Oct 27, 2026
  • letta-docs-md Public

    Automatically generated Markdown mirror of docs.letta.com, ready to grep. Do not edit by hand or open pull requests.

    letta-ai/letta-docs-md's past year of commit activity
    4 3 0 0 Updated Oct 20, 2026
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