{"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-house-azlu6073","versions":[{"created_at":"2026-06-26T06:16:39Z","element_count":71,"note":"5軸GA polish 46->97 by M5 (autonomous)","saved_by":"mcp","sha256":"ad29627e6c3e3ba32d06205a0b7ad6c106e3e3da3b133253e908c6eb84e682e5","version":3},{"created_at":"2026-06-26T06:09:21Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"481f03dedd47f8774c65cee754b6c70a138f6a09bd9bd934e07857570ec10306","version":2},{"created_at":"2026-06-26T06:09:21Z","element_count":90,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}