{"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-5rji20t5","versions":[{"created_at":"2026-06-29T07:09:53Z","element_count":132,"note":"言葉から生成: 中庭ロの字 / 中庭のある回遊動線・ロの字 / 中庭採光・換気 / 回遊動線 / 吹抜 / 太陽熱温水器 / 高気密・高断熱","saved_by":"mcp:create","sha256":"","version":1}]}