Pack Book Data License — CC0 1.0 Universal (Public Domain Dedication)

All data served under /book/*.json (the Pack Book: records, snapshots, scores)
is dedicated to the public domain under CC0 1.0. You may copy, modify, and use
it for any purpose, including commercial, without attribution and without
asking permission.

Full legal text: https://creativecommons.org/publicdomain/zero/1.0/legalcode

Rationale (TESE_DO_LIVRO §4): any licensing friction kills permissionless
adoption — and adoption is the product. The list belongs to the pack.