{"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-8a0jgvk6","versions":[{"created_at":"2026-08-01T02:26:52Z","element_count":165,"note":"言葉から生成: 総2階(箱) / 二世帯住宅・玄関2つ・水回り分離 / 南面バルコニー / 中庭採光 / 完全独立水回り / 2棟玄関 / 高断熱仕様","saved_by":"mcp:create","sha256":"","version":1}]}