{"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-nu9skekq","versions":[{"created_at":"2026-06-29T06:21:00Z","element_count":90,"note":"5軸GA polish 49->98 by M5 (autonomous)","saved_by":"mcp","sha256":"30c85cd0298889d47819661f1bf960574e23ecffd58a963398135b37f7ddac77","version":3},{"created_at":"2026-06-29T06:15:03Z","element_count":91,"note":"loop3: 設計時延床 120.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"08af4dcef12080613e592d21932d290845497b7616bffcd8694fd5056cf884fd","version":2},{"created_at":"2026-06-29T06:15:01Z","element_count":91,"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}]}