{"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-63ojxby5","versions":[{"created_at":"2026-06-10T22:52:19Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote20898438 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"8a0b8eb030875c15c28c7a2c27bcec9df71282dcd6025a2039042525868bf5d1","version":25},{"created_at":"2026-06-10T13:24:27Z","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":"27d5c39f29d8a21c254858222794a6bfde74b5537f842d04d6d555940fe60695","version":10},{"created_at":"2026-06-10T10:53:08Z","element_count":85,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b629f1fe34fb4c8034b3cd30aca4a3855be86817803886e7d6a9e656d01e2074","version":3}]}