{"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-6l1et5yl","versions":[{"created_at":"2026-07-04T09:14:02Z","element_count":146,"note":"言葉から生成: 中庭ロの字 / 茶室と縁側のある和の住まい / 茶室 / 縁側 / 中庭 / 南面採光 / 通風","saved_by":"mcp:create","sha256":"","version":1}]}