{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-ardennessunrisebunga-1ocfdb9w","versions":[{"created_at":"2026-06-10T22:53:49Z","element_count":62,"note":"legacy fix: jpy102533759→quote20926514 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"73fd30142be3e530b4d14c7c1edfba2d7fab7bb0c3323485f4a17f897081fef3","version":10},{"created_at":"2026-06-10T17:08:47Z","element_count":72,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"312baf726e7c48cac8aa6384c1224b716aac1fe6098304c1b55591db15236819","version":2}]}