{"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-wq9539pi","versions":[{"created_at":"2026-06-10T22:57:13Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72711600→quote20693313 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"db4a0af159e28af5168766f12291fa4bcff7affd80203d505987fca1939dcf3c","version":9},{"created_at":"2026-06-10T19:18:35Z","element_count":72,"note":"5軸GA polish 60->95 by M5 (autonomous)","saved_by":"mcp","sha256":"8f17555145e977b1ac2e3a2a31cdf2b3fef465e424144c4a1697b506d2db7e0b","version":2}]}