{"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-fdyvm3n0","versions":[{"created_at":"2026-07-02T15:48:24Z","element_count":147,"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 / 南面大開口 / 通風廊 / 高断熱仕様","saved_by":"mcp:create","sha256":"","version":1}]}