{"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-f4w9smjv","versions":[{"created_at":"2026-06-10T22:52:25Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote22367202 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"65d259bfd8b0294b25fb8fa820c59ba4e0136207d8aaf7d487f776cdb08dba5d","version":23},{"created_at":"2026-06-10T13:30:53Z","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":"7c01220652869f6e2bde9f1ccc88cb06e904606c94111f2334c1991198061287","version":9},{"created_at":"2026-06-10T12:00:00Z","element_count":72,"note":"5軸GA polish 54->96 by M5 (autonomous)","saved_by":"mcp","sha256":"2aad421d4a6081c21032cf3b32233864d12480fd9875bf1123eb93672ff44727","version":4}]}