{"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-8dp1ftc3","versions":[{"created_at":"2026-06-10T22:52:30Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote21461389 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"dca53d981ab6f19764c6f779a78e890537222497c202971acf3a30bad1bac5e2","version":20},{"created_at":"2026-06-10T13:34:26Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積93.9㎡(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":"5a33c4af4546f7c6c4c03b46319e3c99cde5f640e695cef60e2a4eb7e1926d33","version":7},{"created_at":"2026-06-10T12:49:05Z","element_count":74,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"bb135d36a3109f4c6e93df59e493380435602094d1378c94a9505c3e6297a290","version":4}]}