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.
Latest release v0.8.70 — Release v0.8.70 · 5 Nov 2026
1 file for Codex and OpenCode: letta-agent-sdk AGENTS.md — 1,478 tokens loaded in every session.
AGENTS.md A 1,478 tok These files are letta-ai/letta-agent-sdk's own configuration — they tell Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.