{"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-ec61k0q1","versions":[{"created_at":"2026-06-10T22:52:37Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy73729440→quote21676439 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"1af69bda3fe43f8d5eb627a6764e23b75c0aa2efd9381fb57210b2ec9b768237","version":18},{"created_at":"2026-06-10T14:13:11Z","element_count":84,"note":"5軸GA polish 69->97 by M5 (autonomous)","saved_by":"mcp","sha256":"e72fb40fdf5c0c13e3c05fdb28bead9025441c5acdcde3ec84e94efe05e70426","version":7},{"created_at":"2026-06-10T13:47:42Z","element_count":44,"note":"backfill: 延床=居室床スラブ実面積90.0㎡(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":"e180a2566902264f3026b2cd496e79c9053c2e1fd2ceb4da81d6a47f62070305","version":4}]}