Second Brain OS
Second Brain OS is A knowledge base your agent maintains, in plain markdown you own. The whole guide, the agents course, five handbooks and the toolkit as one explorable graph.. It is ranked #4141 on the AI Radar, in RAG & memory, first seen 45 days ago and shared in 2 posts (242.7k views).
Second Brain OS - the map [[ second brain os ]] ≡ Contents / the whole site, as one graph A knowledge base your agent maintains Everything you read, watched and wrote, turned into linked pages and kept current by an agent. Plain markdown on your own machine. Every page, term and tool on this site is a bubble. The lines are the real links between them. Click one to see what it leans on. drag orbit scroll zoom click open esc back ← graph × ⟳ ⌂ [[ second brain os ]] drawing the map… This page draws the site as a 3D graph and needs JavaScript. The guide is also readable on GitHub .
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Second Brain OS in numbers
- Rank on the AI Radar: #4141 of 10402
- Shared in 2 posts by 1 account: @undefinedKi
- 242.7k views on those posts
- First seen 45 days ago, last shared 37 days ago
- Pricing seen by AGK Intelligence: not stated
- Market: RAG & memory
FAQ
What is Second Brain OS?
A knowledge base your agent maintains, in plain markdown you own. The whole guide, the agents course, five handbooks and the toolkit as one explorable graph. It was first shared on X 45 days ago and is ranked #4141 on the AI Radar.
Is Second Brain OS free?
Pricing is not stated on the page we read.
Who shared Second Brain OS?
1 account on X, including @undefinedKi, in 2 posts totalling 242.7k views.
Every post is read and classified by AGK Intelligence: what it is, which market it belongs to, and whether the link is a real tool. 65.6k posts from 5k X accounts over the last 14 days, 10.4k tools, 19 markets. New posts are collected several times an hour and the full ranking is recomputed every hour — last update 2026-11-06 15:10 UTC. Full method.