{"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-7d93wlfn","versions":[{"created_at":"2026-06-15T07:34:29Z","element_count":169,"note":"言葉から生成: 中庭ロの字 / 中庭のある回遊動線・ロの字 / 豪雪対応(勾配屋根・除雪動線) / 中庭採光 / 回遊動線 / 南面開口 / 吹抜け","saved_by":"mcp:create","sha256":"","version":1}]}