{"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-du9cmn8j","versions":[{"created_at":"2026-06-10T22:52:24Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20920518 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0668457feec75f5e3651a313011bb9afceec62bed137ff9dbe9ecfa959ed8c6c","version":23},{"created_at":"2026-06-10T13:30:19Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.4㎡(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":"42953ddb9d392a8e7e67cec89ccfb88678d3f8f3fa6411994638b80566ac7043","version":9},{"created_at":"2026-06-10T11:44:00Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"c4fb90d3098f8c9fd8c98b9fa6a0d813cc32099c4c895a26e21f799647566677","version":4}]}