{"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-au9ksjqv","versions":[{"created_at":"2026-07-16T10:11:19Z","element_count":214,"note":"言葉から生成: L字 / 二世帯住宅・玄関2つ・水回り分離 / 独立玄関 / 水回り分離 / 高断熱・高気密 / 冬期日除け / 吹抜け","saved_by":"mcp:create","sha256":"","version":1}]}