{"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-ai2iy55g","versions":[{"created_at":"2026-06-16T11:25:37Z","element_count":223,"note":"言葉から生成: 中庭ロの字 / ピアノ室と防音・吹抜のある家 / 吹抜 / 防音室(ピアノ) / 中庭採光 / 高気密高断熱","saved_by":"mcp:create","sha256":"","version":1}]}