{"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-kui8efyh","versions":[{"created_at":"2026-06-19T04:14:03Z","element_count":222,"note":"言葉から生成: 中庭ロの字 / 狭小の町家・吹抜・坪庭 / 吹抜 / 坪庭 / 耐雪荷重等級4 / 高気密等級6 / 東南面集約配置","saved_by":"mcp:create","sha256":"","version":1}]}