{"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-x6o53lxx","versions":[{"created_at":"2026-06-10T22:52:26Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20699765 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"8e534849d55cee6857d3ee5b8a380a8df7e04bcc7ae858b72ef44fd6f895ad0f","version":22},{"created_at":"2026-06-10T13:31:18Z","element_count":65,"note":"backfill: 延床=居室床スラブ実面積90.0㎡(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":"3327f325285273b58992b09b7de4ca8a03752ec172ecf3a9295eb728cb7a2554","version":8},{"created_at":"2026-06-10T11:59:59Z","element_count":70,"note":"5軸GA polish 60->96 by M5 (autonomous)","saved_by":"mcp","sha256":"a6344d8ad59e988f45cef19029ecf949d3202f240da7d0593b14d80cccfec910","version":3}]}