{"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-hilltophavenhouse-h4x8h54z","versions":[{"created_at":"2026-06-10T22:53:48Z","element_count":77,"note":"legacy fix: jpy85444799→quote21192161 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"04c8a22bb26847da93fceefc7851546f90b10b2d7ee46cc4eab6d10da0d127a2","version":10},{"created_at":"2026-06-10T17:08:44Z","element_count":70,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"30ec19e4465e6b52ed7401bf5fa38e8c06824a507fe0748e23ceb456ac4d5a4f","version":2}]}