{"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-4u7dwzsf","versions":[{"created_at":"2026-06-10T22:52:34Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20933393 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"507f6dbf660b7f83010cb84488998ba87e81ece52bd189ae48e0d8038bcfc2b9","version":19},{"created_at":"2026-06-10T13:45:03Z","element_count":63,"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":"b229bb704005c40d7c54fb72d37f3710b109c6705be6f7fdb90e536523d3bf99","version":6},{"created_at":"2026-06-10T13:22:12Z","element_count":72,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"fd9729eea9dbcfae1482bd8e56175837c4afb4407147fe1f5cc3998539f32be2","version":3}]}