{"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-fcs82oft","versions":[{"created_at":"2026-06-10T22:58:12Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / 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":"dbf38d9d7cdf5a5d802bd16097de85e4a8c3c1c715cacc7f6e11668175741047","version":9},{"created_at":"2026-06-10T19:50:59Z","element_count":84,"note":"5軸GA polish 56->95 by M5 (autonomous)","saved_by":"mcp","sha256":"6585dd5d7768503495022a9064026b41990ad393673263945b26e48a5e8acfc9","version":2}]}