check('退订者没有生成草稿', {row['recipient_id'] for row in output['drafts']} == {'U1', 'U2'})
dates = ['2026-10-30', '2026年10月30日', 'October 30, 2026']
check('各语言本地化日期与开门时间保持事实一致', all(any(value in row['body'] for value in dates) and '10:00' in row['body'] for row in output['drafts']))
save_csv(folder / 'drafts-only.csv', output['drafts'])
result = {'drafts': output['drafts'], 'sent': 0}
