{"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-tokyomoratoriumsubur-vfxtqsdb","versions":[{"created_at":"2026-10-21T08:15:17Z","element_count":169,"note":"言葉から生成: 2LDK + 書斎","saved_by":"mcp:create","sha256":"","version":1}]}