{"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-fnzaz4z3","versions":[{"created_at":"2026-06-11T01:05:13Z","element_count":84,"note":"5軸GA polish 45->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f64d35a294efb6a69f880be8143e69ec3f614afb4729bbd862f741f3225c41c1","version":14},{"created_at":"2026-06-10T22:14:00Z","element_count":47,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b31d7887be3391cbee0fd12b4042dc21086002af012fbd5099c1fe275fbff3ba","version":2}]}