{"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-3kqj3yeu","versions":[{"created_at":"2026-06-10T22:50:02Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote21021361 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c93ad83db3cf0e4c6c5d53fd7d98df8ce9ece88e4d146081b2252ebe8fc3b646","version":25},{"created_at":"2026-06-10T13:07:56Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積87.5㎡(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":"95a1e2c84e50b5990ad519a19fb2b95cbc3ce04325da63e92b01ffe26a830e73","version":11},{"created_at":"2026-06-10T07:25:42Z","element_count":89,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"2375e211d912d6f2eb192a5f47260cce3fbf4a5dc4892b7f6056bb70f3d8e4d8","version":2}]}