The whole project has hundreds of files, so the delta partly works. But I think the manifest only should include the modified files.

On subsequent checkins, all those 20 files get into the delta manifest. There may be something special in them that makes them get into the delta manifest, but I don't know what.

drh added on 2011-01-12 16:09:59 UTC:
A delta manifest show all changes going back to the baseline manifest and the baseline manifest might be two or three or a hundred checkins in the past.