{"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-aj69b2rk","versions":[{"created_at":"2026-06-10T22:52:32Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20631425 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"26ab65ad3fdf324c5edbeb98f498acb6389f01bcff0dc46897544295bba6caed","version":20},{"created_at":"2026-06-10T13:44:02Z","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":"69c855550dc4f95c45cb4db404c8fc5e9985359113267fd75e07329629c229e4","version":7},{"created_at":"2026-06-10T13:05:06Z","element_count":72,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"40fcf23793b1d02e62f621f52cf622d8db4f96df01a151b4f249754cfa102268","version":4}]}