{"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-4dij7zu4","versions":[{"created_at":"2026-07-24T06:22:33Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c93c0d414d5e272a9b16a4f440fe6a5f5fb1eac2893c8bd2b8e9dd717884bac9","version":2},{"created_at":"2026-07-24T06:22:22Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}