Brain OS

25 AI-powered skills for managing your second brain in Obsidian with Claude Code.

Brain OS is a Claude Code plugin that turns your Obsidian vault into an intelligent second brain. Run /self-learn to master a book autonomously, /today to start your morning with a prioritized plan, or /think to enter deep thinking mode — all from your Claude Code session.

How it works

Brain OS installs 25 skills into Claude Code. Each skill is a slash command — type it in any Claude Code session and the AI takes over, reading your vault, running scripts, and writing results back to Obsidian.

1. Install Brain OS

   Run the one-line installer to clone the plugin and link all skills to Claude Code.

   curl -sSL https://raw.githubusercontent.com/sonthanh/brain-os-plugin/main/skills.sh | bash
   
2. Set your vault path

   Edit ~/.brain-os/brain-os.config.md and point it at your Obsidian vault.

   vault_path: /path/to/your/obsidian/vault
   
3. Run a skill

   Open Claude Code and type any Brain OS skill command to get started.

   /today
   

Explore the docs

Quick Start

Install Brain OS and run your first skill in minutes.

Vault Setup

Set up the Obsidian vault structure Brain OS expects.

Knowledge Pipeline

Extract, validate, and absorb knowledge from books with a 3-phase autonomous pipeline.

Daily Operations

Morning reviews, end-of-day processing, session handovers, and vault sync.

Thinking Tools

Deep thinking mode, belief challenging, idea generation, and pattern surfacing.

Configuration

Set your vault path, manage dependencies, and configure the eval system.