{"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-7u430dyx","versions":[{"created_at":"2026-06-10T22:52:05Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21039553 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"5c9e8d1a524056fdb82e333aa442683c70266de9fd0f7040d93d7145f3760d3f","version":26},{"created_at":"2026-06-10T13:12:06Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.7㎡(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":"36e68d6f412e75e3535e685c12350bd3c4996437f0fb0bacecb612b8c4ef8856","version":11},{"created_at":"2026-06-10T08:33:03Z","element_count":74,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"22c923384366b8c462d665307de9cd1679f4649d99fdd857a3561e30198c4c73","version":3}]}