{"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-f8ul2k1u","versions":[{"created_at":"2026-06-10T23:07:11Z","element_count":73,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote26676023 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"754cc77a2ec393ce9bcf2b33db6c74a669f69fb7921c73aee7f175e6d927eca4","version":9},{"created_at":"2026-06-10T22:52:05Z","element_count":73,"note":"5軸GA polish 56->97 by M5 (autonomous)","saved_by":"mcp","sha256":"aca45d5548496139b5396842aedb9360f43134a13c6bd9f78d939d078b7c3b99","version":8}]}