{"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-x7ntcepm","versions":[{"created_at":"2026-06-13T17:09:31Z","element_count":90,"note":"5軸GA polish 39->94 by M5 (autonomous)","saved_by":"mcp","sha256":"7043599f506c95db54f10b47f57ad4fa5547bbc8355afbda8d7859431e472938","version":3},{"created_at":"2026-06-13T16:56:41Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e432d1cae54f825742c53e34237547313dcc1478ed5033d7c4d896e398d9ab55","version":2},{"created_at":"2026-06-13T16:56:40Z","element_count":119,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}