{"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-wgxah2wk","versions":[{"created_at":"2026-06-10T23:01:00Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20938754 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"bfd564fc32fb8989bc0e800a3e1a269414d3184ab362c17607c9b7127451946c","version":9},{"created_at":"2026-06-10T22:00:47Z","element_count":74,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"ea64f682e34da9675abadfa7010f9db519cf96607ea12cb24251ee93cd95cf1e","version":3}]}