{"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-ch78xuyl","versions":[{"created_at":"2026-06-10T22:58:57Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote22740658 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"51b3d04b553e92116d5fd0dcb06aea0d9e1b370030e5103d68a1f4a7f5c34cc7","version":9},{"created_at":"2026-06-10T20:22:39Z","element_count":89,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"375a0adb546858363a11cb68b970df0ed07fcdeb5702e319c903fff90ca763f9","version":2}]}