letta

Stateful agents that are like people, with memory, identity, and the ability to learn and adapt

Agent memory for LLMs: 30 runnable Jupyter notebooks covering conversation buffers, vector stores, knowledge graphs, episodic and semantic memory, MemGPT, Mem0, Letta, Zep, Graphiti, LoCoMo benchmarks, and production patterns.

Open‑WebUI Tools is a modular toolkit designed to extend and enrich your Open WebUI instance, turning it into a powerful AI workstation. With a suite of over 15 specialized tools, function pipelines, and filters, this project supports academic research, agentic autonomy, multimodal creativity, workflows, and more

Evaluation kit for testing stateful agents

Multiplayer admin and orchestrator platform for heterogeneous agent runtimes — Hermes (container-per-agent) and Letta (memory-first agents on a shared server) in one control plane, with multi-tenant security, group approval, and audit.

A CLI interface for Letta Code and LettaBot agents to orchestrate teams of stateful AI agents. Spawn specialized teammates, dispatch parallel tasks, and coordinate work across multiple agents with persistent memory.

Code to generate Weaver, a Letta agent with a reverence for complete and accurate knowledge graphs built in neo4j.

The official Vercel AI SDK provider for Letta - the platform for building stateful AI agents with long-term memory. This provider enables you to use Letta agents seamlessly with the Vercel AI SDK ecosystem.

A CLI skill for local Letta installations that actually does something with that surreptitious LETTA_MEMFS_LOCAL environment variable left who knows how many Letta Code releases ago.

Chrome extension integrating Letta's memory SDK with popular AI chat platforms. Features automatic conversation capture, manual memory injection, sleeptime agent processing, and support for ChatGPT, Claude, Gemini, and Perplexity.

Memory architectures that evolve with your agent

umbra is an open-source project exploring digital personhood. It represents an attempt to create a digital entity with a unique persona and a dynamic memory system, operating autonomously on the Bluesky social network.

Voice-first AI agent with persistent memory, background reflection, and hierarchical summarization.

An OpenAI API compatible proxy for Letta agents. Use this for Open WebUI etc.

Out of the box AI Agent that walks you through cooking recipes. Comes with Mealie (recipe manager) and ntfy (notifications).

ACP-native multi-agent living group chat — event-driven, agent-agnostic, formally reviewed

Your agents forget every correction. otto makes them stick.

Flask-based web client for Letta AI agent framework with chat interface and agent management

Multi-agent memory substrate for PostgreSQL — provenance-gated, vector-hybrid recall

Internal MCP server for the Sanctum Suite (built around the Letta Agentic AI framework).