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.
- 1.1k stars
- 184 forks
- 4 open issues
- Language: HTML
- License: MIT
- updated
Install
git clone https://github.com/undefined-ui/second-brain-os ~/.claude/skills/second-brain-os- Clone the repository into your ~/.claude/skills directory (or copy the skill folder containing SKILL.md).
- Start a new Claude Code session so the skill registry reloads.
- Invoke it by name, or let Claude trigger it automatically when the task matches.
If the repo bundles several skills, copy only the folders you need.
Skills overview
What people ask about second-brain-os
What is undefined-ui/second-brain-os?
undefined-ui/second-brain-os is skills for the Claude AI ecosystem. 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. It has 1.1k GitHub stars and its last recorded update is dated 2026-10-14.
How do I install second-brain-os?
You can install second-brain-os by cloning the repository (https://github.com/undefined-ui/second-brain-os) or following the README instructions on GitHub. ClaudeWave also provides quick install blocks on this page.
Is undefined-ui/second-brain-os safe to use?
Our security agent has analyzed undefined-ui/second-brain-os and assigned a Trust Score of 97/100 (tier: Verified). See the full breakdown of passed checks and flags on this page.
Who maintains undefined-ui/second-brain-os?
undefined-ui/second-brain-os is maintained by undefined-ui. The last recorded GitHub activity is dated 2026-10-14, with 4 open issues.
Are there alternatives to second-brain-os?
Yes. On ClaudeWave you can browse similar skills at /categories/skills, sorted by popularity or recent activity.