---
title: "undefined-ui/second-brain-os"
description: "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."
canonical_url: "https://awesomeclaudeplugins.com/undefined-ui/second-brain-os"
repository_url: "https://github.com/undefined-ui/second-brain-os"
stars: 1100
forks: 180
plugins_count: 1
publication_state: "indexable"
quality_note: "Canonical repository has a validated plugin count."
catalog_updated: "2026-10-18T00:34:25.053Z"
install_command: "/plugin marketplace add undefined-ui/second-brain-os"
---

# 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.

## Repository

- [Catalog detail page](https://awesomeclaudeplugins.com/undefined-ui/second-brain-os)
- [GitHub repository](https://github.com/undefined-ui/second-brain-os)
- Stars: 1100
- Forks: 180
- 1 plugin entries are reported.

## Catalog provenance

- Publication state: indexable
- Quality note: Canonical repository has a validated plugin count.
- Repository metadata source: catalog snapshot dated Oct 18, 2026, not live GitHub API data

## Installation

When this repository exposes a Claude Code marketplace, add it with:

```bash
/plugin marketplace add undefined-ui/second-brain-os
```