{"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-0472h6t9","versions":[{"created_at":"2026-06-10T22:52:48Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote20821160 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"9df80dd02e88dadb672244591bf6cb3df13e3dbf14f4f7469ed19b7f4aeb2e43","version":10},{"created_at":"2026-06-10T16:23:15Z","element_count":91,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"8434992aeb6e4b0f363d0c5e31d4918bf9201b8776135d7b9eff247fd19c9b9d","version":2}]}