{"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-v9gm9swv","versions":[{"created_at":"2026-07-22T19:29:18Z","element_count":122,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"1533162de7aa8b91737cd2e21d06985cfb4f28366a146240114bf76e17dfd8ef","version":2},{"created_at":"2026-07-22T19:29:18Z","element_count":122,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}