{"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-lindengrovehouse-j4cu81fh","versions":[{"created_at":"2026-06-10T22:53:46Z","element_count":77,"note":"legacy fix: jpy87379776→quote20131232 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4d3a785fe435e759223cece8891988f0cbee268505e8a678c6646eca3505bb31","version":10},{"created_at":"2026-06-10T17:08:54Z","element_count":84,"note":"5軸GA polish 43->98 by M5 (autonomous)","saved_by":"mcp","sha256":"e4ea963e280921fff973ce260edbd9b74ddd9b52bef725e1dc446471e35bf016","version":2}]}