{"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-qmgjksxs","versions":[{"created_at":"2026-07-26T06:05:23Z","element_count":83,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"09dabe952b64982ffac86f08969ce1223d6bebf339ff4a54360a976809b75c47","version":2},{"created_at":"2026-07-26T06:05:18Z","element_count":83,"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}]}