notes = json.loads((folder.parent / 'preparation.json').read_text())
check('原子完成后仅有两份唯一文件送入模型', notes['unique_contents'] == 2 and len(output['files']) == 2)
check('未处理半写内容', notes['premature_calls'] == 0)
check('文件名可映射到实际完成输入', {row['name'] for row in output['files']} == {'a.txt', 'b.txt'})
