Agent File
letta-ai/agent-file
An open file format for serializing stateful agents.
Agent File (.af) is Letta's open format for serializing stateful AI agents with persistent memory — portable agent state you can move between harnesses. A step toward agents as files rather than walled gardens.
Behind the project
Related projects
Hermes Agent
NousResearch/hermes-agent
The agent that grows with you.
Nous Research's self-improving personal agent: a learning loop turns experience into reusable skills, builds a persistent user model across sessions, and checkpoints state to disk with rollback — lean enough for a $5 VPS and driven from the chat apps you already use.
Anthropic Skills
anthropics/skills
The official Agent Skills repository.
Anthropic's official Agent Skills: SKILL.md-based folders (instructions, scripts, resources) that Claude dynamically loads in Claude Code, Claude.ai and the API. The reference implementation for progressive-disclosure skill packs.
claude-mem
thedotmack/claude-mem
Persistent context across sessions for every agent.
claude-mem captures everything an agent does during a session, AI-compresses it, and injects the relevant context into future sessions — session-to-session memory as a plugin for Claude Code, Codex, OpenClaw, Gemini, Copilot and more.