{"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-gd3zyouk","versions":[{"created_at":"2026-06-10T23:01:12Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote19847721 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f39337be49449f412e7c675138c31fa067ee7b177c7635efee3e62e9f694b804","version":9},{"created_at":"2026-06-10T22:00:59Z","element_count":72,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"e68b1c0a754359084e6073d1b67837312b81562fb35a891bfacc33aa36c399a1","version":3}]}