{"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-0hvsl9b9","versions":[{"created_at":"2026-06-10T22:52:45Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote19615588 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"873ed89a7412f0b9cfd6bb759d14298a8b31f30895dfbdc4239b20e87d187798","version":12},{"created_at":"2026-06-10T15:53:07Z","element_count":72,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"b7ddcf2774c781384c6d56cac337c2a388d4d297f15d757c1c656156523f4f4b","version":4}]}