{"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-mm1iemvy","versions":[{"created_at":"2026-06-10T22:52:39Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote19847721 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b90eb47266338ce6bac7bc9a8977a716390c31864aae1c6f2d78d04abd5da14b","version":15},{"created_at":"2026-06-10T14:46:14Z","element_count":90,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"ef28a10a97bae08c15314a26a0fd073d34656cb64c6e73d91f58ab94ac9a2944","version":6}]}