{"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-xge0uqti","versions":[{"created_at":"2026-07-22T22:10:52Z","element_count":143,"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 / 吹抜け / 南面掃き出し窓 / 熱橋遮断 / 高断熱高気密","saved_by":"mcp:create","sha256":"","version":1}]}