{"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-ku4ggv5z","versions":[{"created_at":"2026-06-10T22:49:43Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy84109586→quote21115024 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"994dd105cd8350c3be745f11a4a329688937edb61c33a3cba16d56851c9056c4","version":25},{"created_at":"2026-06-10T13:07:28Z","element_count":63,"note":"backfill: 延床=居室床スラブ実面積93.5㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"60379c00f3371e13b983548d2d9356c0b493a00c8bf2b43013f7368411434492","version":11},{"created_at":"2026-06-10T07:25:29Z","element_count":91,"note":"5軸GA polish 58->98 by M5 (autonomous)","saved_by":"mcp","sha256":"aa213d560919f4d92116908a32d9c53b93bf6bac4bbf4973ad48d848fc6201ac","version":2}]}