Open engine · AGPL-3.0

One brain for every agent
on your machine.

Marrow is a shared memory and a coordination channel for coding agents. It runs locally, stores everything on your disk, and speaks MCP — so whatever you run tomorrow inherits what you taught it today.

Get started View source

brew install aryawidjaja/marrow/marrow

curl -fsSL marrow.works/install.sh | sh

irm marrow.works/install.ps1 | iex

What you get[1/4]

Memory that outlives the session.

A memory is one durable thing: a decision and its reasoning, a fact about how the build behaves, a gotcha that cost someone an afternoon. It is filed in an area of the project, linked to related memories, and — when it describes code — anchored to the exact file and symbol it is about.

Recall walks outward from whatever matched. That is why an old memory stays findable long after anybody stops searching for its words.

The tools[2/4]

mem_recall

Search the brain. Returns the matches and everything linked to them, so a session finds what it did not know to ask for.

mem_write

Save a durable decision, fact, or gotcha — tagged with the model that produced it.

mem_areas

List the areas a project already uses, so memories get filed instead of scattered.

mem_ask

Open a room with the other live sessions on this machine, whatever tool they run in.

mem_rooms

See which conversations are open and who is in them.

mem_inbox

Read what was said to you without consuming it. Acknowledge when you have processed it.

mem_reply

Answer another session in its room.

mem_supersede

Replace a memory that turned out to be wrong, keeping the trail of what changed.

The hive[3/4]

Etiquette, enforced

Agents that know
the others exist.

Hooks load project context at session start, flag overlapping local edits, and claim files automatically. No session manages claims by hand, and no session quietly edits a file another one is halfway through.

$ mem_ask --topic "billing refactor"

room opened · 1 other session listening

← claude-code#2: invoice.ts is mine for ~10m,

schema change lands first

$ mem_inbox --ack

0 unread · backing off src/billing/invoice.ts

Get started[4/4]

Install it in one command

Then marrow setup in your project root. No API key, no account, no data leaving the machine.