{"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-x4axpcfi","versions":[{"created_at":"2026-09-18T19:25:16Z","element_count":169,"note":"言葉から生成: 2LDK + 書斎","saved_by":"mcp:create","sha256":"","version":1}]}