For monographs without any direct links (for an example, see Walking the N8P) we currently provide a helpful ❓ summary / details element that explains the WorldCat link:
Collapsed:

Expanded:

This task is to add a similar help tip on archive.org links to books that are only available for borrowing, explaining how to sign up for a free account and begin borrowing. You might want to link to their official explanation here: https://help.archive.org/help/borrowing-from-the-lending-library/
The current trick for identifying a link that is an archive.org borrow link as opposed to a download link is to see if the external_url contains /mode/ (see the content links include line 1). Note also that this new details element should also be gated on the showworldcat flag in that include.
For monographs without any direct links (for an example, see Walking the N8P) we currently provide a helpful ❓ summary / details element that explains the WorldCat link:
Collapsed:

Expanded:

This task is to add a similar help tip on archive.org links to books that are only available for borrowing, explaining how to sign up for a free account and begin borrowing. You might want to link to their official explanation here: https://help.archive.org/help/borrowing-from-the-lending-library/
The current trick for identifying a link that is an archive.org borrow link as opposed to a download link is to see if the
external_urlcontains/mode/(see the content links include line 1). Note also that this new details element should also be gated on theshowworldcatflag in that include.