{"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-0ppbn48c","versions":[{"created_at":"2026-07-27T06:39:25Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"95b270b6eafc5ed3ead01fcda6e1f30f8082d670818eea83a739aa1417c0f8da","version":2},{"created_at":"2026-07-27T06:39:20Z","element_count":88,"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}]}