{"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-gentleriverhouse-ja5n5q97","versions":[{"created_at":"2026-06-10T22:53:46Z","element_count":77,"note":"legacy fix: jpy85444799→quote22379006 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7c5906b3b09a24a8cda534ef45e5291819b5f6c173509467a2dc13e2caf9a862","version":10},{"created_at":"2026-06-10T17:08:47Z","element_count":70,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"30ec19e4465e6b52ed7401bf5fa38e8c06824a507fe0748e23ceb456ac4d5a4f","version":2}]}