{"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-q8ujybyg","versions":[{"created_at":"2026-06-10T22:52:33Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21201288 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"9423e8ea7c82f6ff497fa862bbcb2ce8b2423da0cc184753e4b98a064a238e88","version":20},{"created_at":"2026-06-10T13:44:40Z","element_count":65,"note":"backfill: 延床=居室床スラブ実面積93.9㎡(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":"3d25fcb8db7c63048cff6260373441f11188ef0b82e0dc95dfc478c9529e9f76","version":7},{"created_at":"2026-06-10T13:22:19Z","element_count":91,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"49668ff52ca6ef66092a255507e387fe3653106aa9dec5fbfefa5beae57c2931","version":4}]}