{"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-willowbrookhouse-azot37pc","versions":[{"created_at":"2026-07-28T06:36:03Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"04e73a3c474fbaaf19a98157e3273399b3616a48aa7eadccfd32f112bf5e7866","version":2},{"created_at":"2026-07-28T06:36:03Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}