{"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-6m3f2ufn","versions":[{"created_at":"2026-06-10T23:01:22Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21288702 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"5fce877f6623c9cb853853e779c7e39beda41cb539c6a5e54c6fd564ef97c8d1","version":9},{"created_at":"2026-06-10T22:17:31Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"c4fb90d3098f8c9fd8c98b9fa6a0d813cc32099c4c895a26e21f799647566677","version":4}]}