We are in the process of upgrading the openlibrary.org website to include the new functionality.
As part of this upgrade, the URLs of the openlibrary.org website will change from /a/, /b/, /l/ and /user/ to /authors/, /books/, /languages/ and /people/ respectively. After this change, the old URLs will get redirected to the new ones.
We are not anticipating any downtime during this process. However, there could be momentary failures in loading some pages.
We’ll post here once the change is over.