{"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-willowbrookhouse-tny2clou","versions":[{"created_at":"2026-06-10T22:53:41Z","element_count":85,"note":"legacy fix: jpy102533759→quote20556188 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7cf03a837e6461aff9402e60bbe8d236c31d33aaf389902799df4a0afae63a46","version":10},{"created_at":"2026-06-10T16:55:13Z","element_count":72,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"127529d66ca7439110a2707f989fc3fbfd6076337c5261ad22b7e5d86bb4d59d","version":2}]}