{"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-q5bmb9n2","versions":[{"created_at":"2026-06-17T02:24:40Z","element_count":231,"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 / 越屋根付片流れ屋根 / 吹抜併設 / 高窓換気 / 土間入り口 / 吹付断熱","saved_by":"mcp:create","sha256":"","version":1}]}