{"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-tcgsjlei","versions":[{"created_at":"2026-06-19T10:32:38Z","element_count":139,"note":"言葉から生成: L字 / 二世帯住宅・玄関2つ・水回り分離 / 吹抜け付き中庭 / 独立玄関×2 / 階段室を媒介した水回り分離 / 高気密・高断熱仕様 / 防風・防雨設計","saved_by":"mcp:create","sha256":"","version":1}]}