AI second brain
An open-source second brain that any AI agent can operate, one rulebook, multiple agents, plain markdown.
Problem
Knowledge bases rot, and AI note-taking is locked to one assistant: notes get written once, never reconciled, and don’t travel across tools.
Approach
A multi-agent vault built on one canonical AGENTS.md rulebook: Claude Code, Codex and Gemini all read the same rules and maintain the same vault. Plain markdown and git, PARA structure, no database. You talk to it in plain language (“log this meeting”, “what should I do today?”, “start a project”) and the agent files, links and maintains everything, with scheduled maintenance agents working in the background.
Impact
Published open-source (MIT), ready in 15 minutes, usable as a personal or shared company brain. I use it daily as my knowledge system and lightweight CRM.
Built with Claude Code.