{"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-vnygd9wm","versions":[{"created_at":"2026-06-10T22:55:35Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→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":"ba8b0e5d4846c2f4e10619c3dae0d6403e56da6e54ba998e8bc9ef71afdcf59c","version":10},{"created_at":"2026-06-10T18:14:05Z","element_count":90,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"548212de1302ad8578b324df26324bf6a62bd608bc4780717479afa168d0cb67","version":3}]}