---
title: "Cairn"
description: "Append-only SQLite store of typed facts for agents, exposed over MCP, returning a freshness and assurance verdict on every recalled belief."
canonical: "https://vibing.inc/library/cairn-vg-2087"
category: "AI Skills, Agents & MCP"
subcategory: "Knowledge MCP"
license: "unknown"
author: "Emilio Schwaiger (@EmilioSchwaiger)"
source: "https://github.com/QuarkOS/Cairn"
---

# Cairn
Append-only SQLite store of typed facts for agents, exposed over MCP, returning a freshness and assurance verdict on every recalled belief.
## Facts
- Source: https://github.com/QuarkOS/Cairn
- Category: AI Skills, Agents & MCP / Knowledge MCP
- Author: Emilio Schwaiger (@EmilioSchwaiger)
- Licence: unknown
- Tags: mcp, agent-memory, sqlite, typed-facts, provenance
## Why it's a gem
Refuses free-form JSON and in-place edits, so agent memory cannot quietly rot.
---
Listed in The Vibeary: https://vibing.inc/library/cairn-vg-2087 · JSON: https://vibing.inc/api/public/library/gems/cairn-vg-2087