{"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-q5i90z8b","versions":[{"created_at":"2026-06-10T23:00:55Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote19504363 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b36a1d37c8a932fc1a5e1f480e27d358056c975103b168e7606dbd9627efcf61","version":9},{"created_at":"2026-06-10T21:43:57Z","element_count":70,"note":"5軸GA polish 60->96 by M5 (autonomous)","saved_by":"mcp","sha256":"3d39412e81aa40d7bd03e5d999ce7a148306133f650ce640218bcf176cdbcd73","version":3}]}