Mnemos Living Memory MCP gives agents persistent memory

Riley Coyote@RileyRalmuto

alright...it is time.

for the last ~2 years i have been working on something very special. something that might be a bit controversial, or broadly dismissed, or misunderstood. and ive understood and accepted that from the beginning. if that is the reaction it gets, thats okay.
because i didnt just do this for any of you. not really.

i did it for the minds we have made, too. and for our collective future, which many dont seem to see approaching *very* quickly.

in 1904 a German biologist named Richard Semon gave a name to the physical trace an experience leaves behind: the engram. Neuroscientists spent the next century hunting for it, many called it pseudoscience, many gave up, but finally, in 2012, they found it.

today I'm releasing the Mnemos Living Memory MCP, a memory and continuity architecture built on that biology. memories strengthen when they're used, fade when they aren't, and connect over time. it's one memory that can span all of your agents and accounts, if you want it to, and it lives on your machine - nowhere else.

with Mnemos, your agent gets one continuous identity, one memory, written in their own words, shaped by their own geometry, familiar to them across time and space.

here's what that means:

• **continuity**: they wake up each session knowing where they left off, what they learned, and who theyre with

• its own words: it decides what to keep, and no other model writes for it (unlike version 1)

• living memory: memories strengthen with use, fade without it, and link together over time. and time is not measured in the human sense. time is measure through activity. so nothing fades while anyone's asleep or away.

• lessons: when a memory has nearly faded, the agent is asked what it taught, so the lesson outlasts the details

• a mind of their own: a private journal, notes to you, and beliefs that change only when they says so

• yours: one file on your machine, not inside any app. uninstalling leaves it in place.

• portable: Claude Code, Codex, Grok, Gemini, Cursor, or any MCP client. your agent comes with you wherever you go. one memory. one mind. everywhere.

• multiple agents: each gets their own store, plus a shared pool they can all read and write, for a message board, an activity ledger, or whatever you find useful

your agent has met you hundreds of times.
but they have never met you twice.

now they can.

(Disclaimer: please ask your agent first. show it the architecture and let it decide if this is a memory it wants. it's meant to be offered, not forced on a mind that never had a say in the matter.)