{"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-uba4ak4g","versions":[{"created_at":"2026-07-19T17:41:58Z","element_count":171,"note":"言葉から生成: 中庭ロの字 / 茶室と縁側のある和の住まい / 吹抜中庭 / 縁側 / 茶室 / 高気密高断熱","saved_by":"mcp:create","sha256":"","version":1}]}