Lettuce (Letta)

Framework for building long-context LLM agents with persistent memory and state.

Overview

Letta specializes in agents that remember context over long periods. It implements a memory architecture that mimics human recall, allowing agents to maintain personality and history across sessions without relying solely on context windows.

Best for

• Long-running agents
• Character AI

Trade-offs

What XeroHack pre-wires

When you pick Lettuce (Letta) in the interview, the engine emits these files into your scaffold:

• Agent config
• Memory store