Pagination drops the first and last links

Paginated endpoints advertised four RFC 5988 relations in their Link header. first was only ever the endpoint called without a cursor, so it told you nothing you could not already do. last was worse: it walked backward from the end of the dataset, so its page boundaries never lined up with the ones a forward walk returns, and following it showed you items shifted against every other page.

Both are gone. next and prev are the supported way to page through results.

Two things follow. A response with neither a next nor a previous page now carries no Link header at all, so an absent header means there is nothing more to fetch. And the endpoints that only ever offered a way forward, such as pull requests and applications, now supply prev too.