{"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-8bbrgrpe","versions":[{"created_at":"2026-07-26T04:47:27Z","element_count":208,"note":"言葉から生成: 総2階(箱) / 越屋根のある自然素材の家・通風重視 / 越屋根付き切妻屋根 / 吹抜け / 南面大開口 / 2階バルコニー / 吹付け断熱(220mm)","saved_by":"mcp:create","sha256":"","version":1}]}