> ## Documentation Index
> Fetch the complete documentation index at: https://aileadersvietnam.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Dependencies

> What Brain OS requires to run, and how to set up the optional Python dependencies for book learning.

## Required for all skills

Every Brain OS skill requires:

* **[Claude Code](https://docs.anthropic.com/en/docs/agents-and-tools/claude-code/overview)** — the AI coding environment that runs the skills
* **An Obsidian vault** — or any markdown-based vault that follows the [expected structure](/configuration#expected-vault-structure)

<Note>
  Most skills — all daily operations and thinking tools — work with just Claude Code and Obsidian. The Python setup below is only needed if you use `/self-learn`, `/audit`, or `/chain` for book learning.
</Note>

## Required for self-learn, audit, and chain only

The knowledge pipeline skills (`/self-learn`, `/audit`, `/chain`) require:

* **Python 3.12+**
* **[notebooklm-py](https://github.com/nicholasgasior/notebooklm-py)** CLI installed at `~/.local/bin/notebooklm`
* **Python packages:** `ebooklib`, `beautifulsoup4`

<Steps>
  <Step title="Install notebooklm-py">
    Follow the setup instructions at [github.com/nicholasgasior/notebooklm-py](https://github.com/nicholasgasior/notebooklm-py). Confirm the CLI is available at `~/.local/bin/notebooklm` after install.
  </Step>

  <Step title="Navigate to the scripts directory">
    ```bash theme={null}
    cd ~/.brain-os/skills/self-learn/scripts
    ```
  </Step>

  <Step title="Create a virtual environment">
    ```bash theme={null}
    python3 -m venv .venv
    ```
  </Step>

  <Step title="Activate the virtual environment">
    ```bash theme={null}
    source .venv/bin/activate
    ```
  </Step>

  <Step title="Install the required packages">
    ```bash theme={null}
    pip install ebooklib beautifulsoup4
    ```
  </Step>
</Steps>

## Dependency reference

| Skill                         | Claude Code | Python + notebooklm |
| ----------------------------- | ----------- | ------------------- |
| All daily and thinking skills | ✓           | —                   |
| /self-learn                   | ✓           | ✓                   |
| /audit                        | ✓           | ✓                   |
| /chain                        | ✓           | ✓                   |

<Info>
  The `ebooklib` package handles epub parsing for book extraction. `beautifulsoup4` processes the HTML content inside epub files. Both are only used by the `/self-learn` pipeline scripts.
</Info>