{"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-up52ahek","versions":[{"created_at":"2026-06-26T19:44:23Z","element_count":83,"note":"5軸GA polish 40->94 by M5 (autonomous)","saved_by":"mcp","sha256":"d96bd0fab67ceafd201699047ca7adc8de8d7cc894538c1c476dcd0ac22295f6","version":3},{"created_at":"2026-06-26T19:30:48Z","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":"853a1fdf715b18123292a9b3171c7268d7aaebb0827a65ee94f1e1c27c1ded0a","version":2},{"created_at":"2026-06-26T19:30:48Z","element_count":101,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+和室+収納","saved_by":"mcp:create","sha256":"","version":1}]}