{"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-3gj6xhkq","versions":[{"created_at":"2026-07-24T06:15:14Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"26eec43ec8c2e802ac080a2acc42d342b7675ecb355a8acd415cf9aaa2c22b14","version":2},{"created_at":"2026-07-24T06:15:07Z","element_count":101,"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}]}