{"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-zc4p7x5e","versions":[{"created_at":"2026-06-12T19:46:10Z","element_count":209,"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 / 中庭吹抜 / ピアノ室完全防音 / 中庭採光","saved_by":"mcp:create","sha256":"","version":1}]}