{"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-3kvak3w1","versions":[{"created_at":"2026-06-10T22:52:25Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→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":"b3b3d0592e100db024110722586305cdacb245f86df9ec84e30f8480b4973d3d","version":22},{"created_at":"2026-06-10T13:30:58Z","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":8},{"created_at":"2026-06-10T12:00:00Z","element_count":83,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b1c4e5b49d350e9770bba58ead9278b4a7ce71bb96caf80eaef9a471fe15409b","version":3}]}