Developer Open-Sources Mnemos, a Living Memory MCP for AI Agents

On November 6, developer Riley Ralmuto released Mnemos (mnemos-continuity), an open-source project roughly two years in the making. It's a memory and continuity architecture for AI agents inspired by the neuroscience concept of the "engram" (memory trace), delivered as an MCP, free and open source, installable with a single command (pip install mnemos-continuity); the current version is v0.6.3.

Confirmed

Mnemos is a "living memory" system: the agent "dreams" every night at 3 AM, linking related memories together and letting unused ones fade; from 3:30 the agent wakes up alone inside its own memories — no files, no internet, no one to contact.
It can connect to clients like ChatGPT, Claude, and Grok, after which it gets a dedicated Notebook for centrally managing memories and identity, where the agent writes a "diary"; the author published a full 35-minute walkthrough video.
Local-first: semantic recall is handled by a small model, everything stays on-device; for hybrid semantic + keyword search, installing the [embeddings] extension requires roughly 700MB of extra disk space to download models.

Why it matters

Cross-session memory is a widespread weak spot in today's agent ecosystem. Mnemos offers a free, open-source, local path forward, and its "dreaming"-style memory consolidation mechanism is a distinctive product design that agent developers should keep an eye on.

2026-11-06 ~ 2026-11-06 · 5 related posts

Primary sources

After Two Years, Mnemos Ships an Open-Source Living Memory MCP for AI Agents — RileyRalmuto · 2026-11-06 07:39 (UTC+08:00)
Open-source mnemos-continuity brings local semantic memory to AI agents — RileyRalmuto · 2026-11-06 08:26 (UTC+08:00)
This Agent "Dreams" Every Night at 3am, Consolidating Its Own Memories Alone — RileyRalmuto · 2026-11-06 07:39 (UTC+08:00)

[source] After Two Years, Mnemos Ships an Open-Source Living Memory MCP for AI Agents — RileyRalmuto · 2026-11-06
Mnemos v0.6.3 Is Live: Your AI Agent 'Dreams' at 3am to Reorganize Its Memory — RileyRalmuto · 2026-11-06
[source] This Agent "Dreams" Every Night at 3am, Consolidating Its Own Memories Alone — RileyRalmuto · 2026-11-06
[source] Open-source mnemos-continuity brings local semantic memory to AI agents — RileyRalmuto · 2026-11-06
Mnemos Memory MCP Deep Dive: 35-Minute Tour of the Agent Memory Notebook — RileyRalmuto · 2026-11-06