{"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-xf1ywcfv","versions":[{"created_at":"2026-06-10T22:52:12Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21075870 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"38ef40a28f04bbc2582c9424c7d8791fc190f252ba8b32682eb5f0ceae6bb744","version":25},{"created_at":"2026-06-10T13:17:17Z","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":"319f55ea20d16c6b39757c7f0e2c293553dbc8ee7ec44f555c655af651157119","version":10},{"created_at":"2026-06-10T09:54:23Z","element_count":90,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"84bf64d2870b77dc35e669bc563bf4219da12f8a2591a118b29ff43fb4133228","version":2}]}