Tracking recent changes is a useful way for bots to stay in sync with a MediaWiki installation. One of the things I'd like to be able to track is which revisions were reverted. The recently added sha1 column is essential for detecting reverts. The sha1 column is available when making the request for a revision (prop=revisions), but not available when requesting revisions in recent changes (list=recentchanges). It appears that part of the reason for this is that the sha1 column does not appear in the MySQL recentchanges table.
I propose that the rev_sha1 column be duplicated to the recentchanges (rc_sha1?) table and exposed via the web api.