{"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-ojhse4s2","versions":[{"created_at":"2026-06-20T07:22:32Z","element_count":133,"note":"言葉から生成: 中庭ロの字 / 書斎とライブラリのある静かな家","saved_by":"mcp:create","sha256":"","version":1}]}