Install in Codex
Install Levirge Brain in Codex from the plugin marketplace and sign in, or use a token in config.toml on machines without a browser.
This covers the Codex app, CLI and IDE extension; they share
~/.codex/config.toml.
1 · Add the marketplace
codex plugin marketplace add https://github.com/levirge/brain2 · Install the plugin
In the Codex app open Plugins, search for Levirge Brain and click
+. A Levirge Brain plugin installed message confirms it. The plugin
also adds the handoffs skill: type $handoffs, or pick it from /skills.
3 · Sign in and verify
Restart Codex and sign in when the browser opens. No prompt? Run
codex mcp login brain. Then verify with a read-only call: kb_overview
returns your workspace's knowledge summary.
Using a token instead
For machines that cannot open a browser (CI, a server), or if the desktop app
signs in but shows no Brain tools, skip the plugin. Put a
token in an environment variable, for example
export BRAIN_TOKEN=<your-token>, and add this to ~/.codex/config.toml:
[mcp_servers.brain]
url = "https://brain.levirge.com/mcp"
bearer_token_env_var = "BRAIN_TOKEN"Sharing a workspace across clients
The same Vault answers to every client you connect. An agent in Codex reads what an agent in Claude Code captured an hour earlier, and both see what a person wrote in Obsidian — the knowledge base is the shared substrate, not a per-client store.
Other clients
Claude Code, Claude Desktop, Obsidian, or any MCP client. No workspace yet? Request access.