{"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-7j5cehvq","versions":[{"created_at":"2026-06-11T00:48:39Z","element_count":84,"note":"5軸GA polish 45->98 by M5 (autonomous)","saved_by":"mcp","sha256":"7744e981ff2270487f5ddddff2bc89546aa3c400b651cae684a37520f17c4666","version":15},{"created_at":"2026-06-10T22:04:08Z","element_count":50,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ac88539474f17cd6d860a2679fc967555f1c5b9e8dcbd8f1def7d49a7dfe7a6c","version":2}]}