# Packs

> Add fields and rules for a kind of library, with a built-in pack or one of your own.

A pack adds fields and rules for a kind of library: extra properties copied from Calibre, wording added to summaries, folders for groups of shelves.

## The built-in pack

**Buddhism** is built in and off until you turn it on, on the **Packs** tab. It:

- copies `#tradition`, `#text_type`, `#composed` and `#translators` from Calibre into book notes;
- files names that end in a title, such as Rinpoche or Lama, whole;
- adds tradition-aware wording to summaries and shelf names.

## Write your own

1. On the **Packs** tab, check the **Packs folder**. The default is `Books/Packs`.
2. Add a folder there with a `pack.yml` file in it.
3. Run **Books & Shelves: Reload packs**. Packs also load when Obsidian starts.

```yaml
name: My library
fields:                    # copied from Calibre columns into book notes (filled when empty)
  - name: genre
    from: "#genre"
    list: true
prompts:                   # text added to a task's instructions
  books.summarize: "Mention the book's setting."
groups:                    # shelf notes go into a group folder by words in their name and genre
  - name: Story
    match: "fiction|tales|poem"
note:
  frontmatter:             # given to new book notes
    sticker: "lucide//book-open"
  banner_from_cover: true  # also set `banner` to the cover
reading:                   # an older status field to read when reading_status is empty
  field: status
  map: { unread: want to read, read: read }
```

A pack with a mistake is named in a notice and left out.

## Related

- [Build shelves](shelves.md)
- [Summarize a book](summaries.md)