{"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-willowbrookhouse-bgpcsg1t","versions":[{"created_at":"2026-06-10T22:52:16Z","element_count":85,"note":"legacy fix: jpy85444799→quote22666392 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"94fd182c6fbce2937fd19f442839cfa08949e9f96b04453ea862f654340bb466","version":25},{"created_at":"2026-06-10T13:21:41Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積92.5㎡(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":"1d9a1be1afd03a1ad33c31335d8f50d77b168e3c5b367108f4496629318d7fe1","version":10},{"created_at":"2026-06-10T10:23:34Z","element_count":73,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"c39c10ceb38cec62f90bd92f72f58fd4422197136694b5dd66144dee86e41aa5","version":2}]}