{"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-2z094sl9","versions":[{"created_at":"2026-06-10T22:52:10Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote21131415 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4371ba1766732125b848b019dbd20827828921904015d9829ba980b4e527cfc6","version":25},{"created_at":"2026-06-10T13:14:28Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積87.5㎡(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":"a9f4a33b982d25e7fecae7ef8813bad9b914200654878870a3e6f9a7e9178e16","version":10},{"created_at":"2026-06-10T09:21:32Z","element_count":84,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"0f06cea69eb6b312ee437f72a6eb24bee0b1b09f28e0b7f824e07fd559b9ca7d","version":2}]}