{"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-l9lsq4am","versions":[{"created_at":"2026-06-10T23:23:54Z","element_count":72,"note":"5軸GA polish 54->96 by M5 (autonomous)","saved_by":"mcp","sha256":"207029a05baef52a7c1865bd26932c7989ca7f192d3080eaa535a018e972695b","version":10},{"created_at":"2026-06-10T23:07:57Z","element_count":50,"note":"legacy fix: rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0bbbd96bfe2389a6ae02541c5b1ce86b2ffa12a90dcfbf7594b543bb2e0c2691","version":7}]}