{"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-i7ffi1nm","versions":[{"created_at":"2026-06-10T22:52:24Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote19851446 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"5cdfc9e2015187fd15343a6c0059ee99e908e43394cc06883d565acc3be0ccc0","version":23},{"created_at":"2026-06-10T13:29:42Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積77.0㎡(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":"34ffa812e40f1c7d47cbb5c8903309668eedd3335efba4488d0bbbd0375ae337","version":9},{"created_at":"2026-06-10T11:44:03Z","element_count":83,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"5ca8f38801acfabf75ce0dba38062dc689e0d8613683045853b137ed392287f4","version":4}]}