See what a queued pull request is waiting on

A pull request that declares a Depends-On: merges after the ones it depends on, so it can sit behind a lower-priority pull request in the queue with no visible reason.

Queued pull requests held back by a dependency now carry a dependency icon in the merge queue list, and the pull request side panel gains a “Depends On” section listing each queued pull request it is waiting on, with a link to each one.

The same information is available from the merge queue status API as depends_on_pull_requests.