longbook is licensed under GPL-3.0. Codebase access is currently by request, for developers helping to make longbook stable — bug fixes, hardening, and building on top of it.
HOW ACCESS WORKS
An email to contact@longbook.app, sent from the registered email address the longbook purchase was made with, carrying two details:
1. A GitHub username or profile link.
2. The reason for access — the intended work.
A repository invitation follows.
The work is coordinated on the community Discord — feature requests, the roadmap, and who is building what.