pixivdwn is an "incremental" Pixiv downloader, in the sense that it tries to cache fetched information, patch them during update, and allowing powerful querying. It is optimized to run as an unattended periodic background job. It keeps track of illustrations in a local database, and enables the user to selectively download some of the illustrations.
Check the documentation site for more details.
If you would like to contribute, you can start by checking out the contributing guide.
pixivdwn is licensed under the MIT License. See LICENSE for more details.