{"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-5o6xbvpp","versions":[{"created_at":"2026-06-10T22:52:39Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote19396944 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ce925804643404653f090e42ae297e3c1284fe17f14e264c9a3edc12d0f69dfe","version":15},{"created_at":"2026-06-10T14:46:16Z","element_count":84,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"0f06cea69eb6b312ee437f72a6eb24bee0b1b09f28e0b7f824e07fd559b9ca7d","version":6}]}