{"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-41g0fd7k","versions":[{"created_at":"2026-06-10T22:52:31Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21063708 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c1845993b419937611473a814b8ca6d3084865e134611504280737a864fedd9c","version":20},{"created_at":"2026-06-10T13:35:04Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.4㎡(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":"ff2a49e0317cef56e20a2842c92724ea3d962725d7b54dd56e2bc3bff3865bf3","version":7},{"created_at":"2026-06-10T13:05:56Z","element_count":90,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"5c2cd015828d419e80a0da6e7fb98076ad4463f5de3af5c3daa7a23a5f69bce3","version":4}]}