second-brain-os
second-brain-os is An AI second brain that maintains itself. Full guide, starter vault, agent skills and scripts for a self-organizing knowledge base in Claude Code and Obsidian. - undefined-ui/second-brain-os. It is ranked #70 on the Vibe Coding Radar, in Skills & agent setups, first seen 37 days ago and shared in 5 posts (83.3k views).
GitHub - undefined-ui/second-brain-os: An AI second brain that maintains itself. Full guide, starter vault, agent skills and scripts for a self-organizing knowledge base in Claude Code and Obsidian. · GitHub Skip to content Navigation Menu Sign in Appearance settings Search / Sign in Sign up Appearance settings You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session. Dismiss alert {{ message }} Repository navigation second-brain-os Public Notifications You must be signed in…
What people said about second-brain-os on X
I still don't get why people bother creating a second brain for Claude from scratch when these 10 repositories already provide complete systems They process your sources, organize them into a wiki, verify every single claim, and one of them even operates entirely on your personal machine 1. obsidian-skills->…
— @Bober_smart, 4 days ago · 520 likes · see the post
Every AI engineer needs this. I spent months collecting everything I wish I had when I started building agents. Now it's free for everyone. Inside the repo: > A 7-module agents course, from zero to production > 5 deep handbooks > 114 vetted resources > 18 skills, 72 slash commands, 6 subagents and a Claude Code…
— @undefinedKi, 3 days ago · 82 likes · see the post
Don't even think about wasting money on AI agent courses. I built a complete AI agents knowledge base for all of you. Free and open source. Every page, term and tool is a node. The lines are the real links between them. It has: > 5 playbooks > 7-module course > ready-to-use setups for every section > 18 skills, 72…
— @undefinedKi, 10 days ago · 54 likes · see the post
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second-brain-os in numbers
- Rank on the Vibe Coding Radar: #70 of 2591
- Shared in 5 posts by 3 accounts: @Bober_smart, @undefinedKi, @BeyondTheBoxCN
- 83.3k views on those posts
- First seen 37 days ago, last shared 2 days ago
- Pricing seen by AGK Intelligence: open source
- Market: Skills & agent setups
FAQ
What is second-brain-os?
An AI second brain that maintains itself. Full guide, starter vault, agent skills and scripts for a self-organizing knowledge base in Claude Code and Obsidian. - undefined-ui/second-brain-os It was first shared on X 37 days ago and is ranked #70 on the Vibe Coding Radar.
Is second-brain-os free?
It is open source.
Who shared second-brain-os?
3 accounts on X, including @Bober_smart, @undefinedKi, @BeyondTheBoxCN, in 5 posts totalling 83.3k 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. 7.9k posts from 5k X accounts over the last 14 days, 2.6k tools, 12 markets. New posts are collected several times an hour and the full ranking is recomputed every hour — last update 2026-11-06 13:13 UTC. Full method.