{"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-4t81x9t3","versions":[{"created_at":"2026-06-10T22:50:29Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote20762394 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"6a52c70404310823de197167f3bb29b334c15027d792b13394a67dbfe828421b","version":25},{"created_at":"2026-06-10T13:08:33Z","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":"b663a9ddc809097fec5c82d3c11646dc782da12bff08bcb63f4206c12b4beda3","version":11},{"created_at":"2026-06-10T07:42:15Z","element_count":89,"note":"5軸GA polish 51->98 by M5 (autonomous)","saved_by":"mcp","sha256":"3b4ba9581d9782fcdaf6185a38dda69184f66a59b465d89fab27667fb7dd90e2","version":2}]}