{"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-ib3kvw1q","versions":[{"created_at":"2026-07-24T19:22:27Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"674a50f796a5ee6c0bd85181e459462e95db036f2ea36b28975ae3877a41d1e3","version":2},{"created_at":"2026-07-24T19:22:27Z","element_count":105,"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}]}