---
title: "Extraction & Dual-Store · agent memory · Agent Fieldbook"
url: https://agentfieldbook.org/memory/types/dual-store/
description: "Stores structured facts instead of raw logs; prevents memory pollution when users change their mind."
section: "Memory · Types"
source: Agent Fieldbook — generated from the published page
---

# Extraction & Dual-Store

Stores structured facts instead of raw logs; prevents memory pollution when users change their mind.

## At a glance

| Field | Value |
| --- | --- |
| Class | Architecture |
| Scope | Long-term semantic |
| Examples | Mem0 |

## How it works

Single-pass extraction pulls atomic facts; operates with ADD / UPDATE / DELETE so a stale fact is explicitly overwritten.

## Watch out

Extraction quality bounds everything downstream.

## Basis

- [mem0.ai](https://mem0.ai)