{"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-n1yfhwlm","versions":[{"created_at":"2026-06-10T22:51:15Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote24745754 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"aeba799335e1b62e313e7dea0565be46e2518f7e6c136ef2dd851bf208d27cde","version":25},{"created_at":"2026-06-10T13:09:45Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積103.4㎡(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":"9278b4103a7f3b40c9ae3149e62c1ffd12ad70cd9db2d1fff6308a4368b56a25","version":11},{"created_at":"2026-06-10T07:59:50Z","element_count":91,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"894782f769e7844f9b5608b9018358fa55fd4c15d668a25ba0ef6cf440085392","version":2}]}