{"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-eastladybarnhouse-3uuqkfdc","versions":[{"created_at":"2026-06-10T22:52:17Z","element_count":77,"note":"legacy fix: jpy102533759→quote18993811 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"bdf1bfe074297d4320d9f8c726794abef7016c2e95fbbae448d42b1dd20449af","version":25},{"created_at":"2026-06-10T13:22:42Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積74.1㎡(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":"458f4e9196896f74f83211f96df8ef8438ef7f7ddaf4da0289dfd2714d9e6054","version":10},{"created_at":"2026-06-10T10:37:32Z","element_count":73,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"96fe343762c1ca87efa12aa9c378ec66ca5ca60e3f6a10bac17934ecd3bd69a3","version":2}]}