{"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-146zbh76","versions":[{"created_at":"2026-06-10T22:52:47Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote20018747 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b3bdd6dd17ffb065fe86096821e51574344e811cee2f1176208d8ecf95583333","version":11},{"created_at":"2026-06-10T16:08:56Z","element_count":85,"note":"5軸GA polish 52->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b21eb2ef1e96d41e7ad14e46d81a57743c98f8cef355655aa94aff7fa51224ba","version":3}]}