{"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-0r740sk5","versions":[{"created_at":"2026-06-16T06:24:35Z","element_count":83,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"3db70daf692d56a2cccddd69d06f9b48d8b22e468d13546f4c9edda04e93276b","version":3},{"created_at":"2026-06-16T06:12:35Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"57dcdb6068823c73a80d3ba4b2a4080608ba8b065846909a2c0bec75383b2f0c","version":2},{"created_at":"2026-06-16T06:12:33Z","element_count":126,"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}]}