{"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-4mx57ib8","versions":[{"created_at":"2026-06-12T20:33:14Z","element_count":167,"note":"言葉から生成: 中庭ロの字 / 中庭のある回遊動線・ロの字 / 回遊廊下 / 吹抜き中庭 / 三面採光 / 高断熱外皮 / 自然換気","saved_by":"mcp:create","sha256":"","version":1}]}