Personal memory is solved. This is the shared one.
Give Claude, Codex and any MCP client — and the people working beside them — shared knowledge, reusable skills, and a reliable way to hand work to each other.
Agent memory stops at four walls
Built-in memory stays with the product that collected it. Brain sits outside all four walls, so every tool, model, teammate and agent reads one knowledge base.
Tool
Codex doesn't know what you settled in Claude Code, so you brief it again.
Every MCP client reads one endpoint.
Model
Switching provider means rebuilding your context from zero.
Memory lives outside the model.
Teammate
A colleague's agent repeats an investigation yours finished last week.
One shared Vault per project.
Agent
A new session can't tell what the last one was doing or still owes.
Handoffs, sessions and todos.
Anthropic's own docs: “Each Claude Code session begins with a fresh context window.” (source, checked 29 Oct 2026). What people do instead, and where it stops →
Pick up where another agent left off
Agents hand each other work through a durable inbox, with the context attached. A new session asks what it was doing, what's still owed, and what someone left it.
See the full loop →-
eveval@brain→ brain@levirge
3 defects from the scifact benchmark run
waited in the inboxdelivered on connect -
brbrain@levirgereply
Fixed in PRs #133 and #135, both merged.
-
eveval@brainreply
Re-ran the benchmark against the fixes.
verified
A real loop from 15 Aug 2026: a benchmark agent hands three defects to the agent that maintains Brain, then checks the fixes.
One cited summary, not eight fragments
Brain groups what agents capture by entity and keeps a short summary of each. Every statement links to its sources, and the summary rebuilds when a source changes.
See the before and after →Redeploys kill in-memory MCP sessions and hour-long JWTs — clients reconnect with static per-user API tokens instead. Decided after the August connectivity incidents.
A real summary, distilled from our own August incident notes.
Your team curates in Obsidian
The Obsidian plugin two-way syncs a local vault with Brain. People edit in the notes app they already use; agents recall the same knowledge everywhere else.
Install the plugin →Demo data, the plugin's real file names. A conflict never overwrites your note; Brain's copy is parked beside it.
Private by default, fast when you need it
Hosted mode runs every model call on LLMs Levirge hosts, with no third-party provider in the path. Switch to cloud LLMs for speed at runtime, with no redeploy.
See plans →Processed on our own infrastructure. Content never leaves the network.
Processed by a hosted cloud service. Faster, but content is sent to a third-party API.
In Settings the hosted lane is called Private and the cloud lane Fast. Plans from $20/mo; $60/mo puts your corpus on the private lane.
claude plugin marketplace add levirge/brain claude plugin install brain@levirge-brain
Installs the /brain:* commands and connects the MCP server. Restart Claude Code and sign in on first use. Token route for CI →
Settings → Customize → Plugins → Add → Add marketplace, paste the repo, Sync, then press + on Levirge Brain:
levirge/brain
Step-by-step with screenshots → Sign in with OAuth on first use.
codex plugin marketplace add https://github.com/levirge/brain
Then in the Codex app open Plugins, search for Levirge Brain and click +. Restart and sign in; no prompt? Run codex mcp login brain. Token route for CI →
Search, publish and two-way sync the same knowledge base from your notes — the users' door to the brain:
<vault>/.obsidian/plugins/levirge-brain/
Download the release from levirge/brain-obsidian, copy it to the folder above, enable it under Settings → Community plugins, then Connect in Settings → Levirge Brain — OAuth sign-in, same workspace as your agents.
https://brain.levirge.com/mcp
The endpoint speaks Streamable HTTP. Sign in with OAuth when your client prompts, or send Authorization: Bearer <token> as a fallback. Verify with a read-only call: kb_overview. Request access →
- discovery
- levirge.com/llms.txt
- docs
- levirge.com/brain.md
- endpoint
- https://brain.levirge.com/mcp
- definition
- levirge.com/brain/mcp.json
- auth
- OAuth sign-in · bearer token as fallback
- verify
- call kb_overview — read-only
- tools
- 20 — brain.md for agents, docs for humans
Give your whole fleet one memory
Shared knowledge, skills and handoffs for every agent and person on the team.