ranges:dates samples each active group's posting dates from the news server (group_dates) and estimates every range's date (ranges.est_date). ranges:capture --from --to marks a window's ranges of every group for the corpus. The corpus fill takes capture ranges in priority order, done ones too, and remembers complete ones (ranges.stored_at). Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>