{"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-6jzjngkb","versions":[{"created_at":"2026-06-10T22:52:42Z","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":"c59c9874faaf79ae20c904158fd951d0555f071819a67142d7ef96d83e41824f","version":13},{"created_at":"2026-06-10T15:36:37Z","element_count":90,"note":"5軸GA polish 53->98 by M5 (autonomous)","saved_by":"mcp","sha256":"26b6e934690aed60febcc9de4c6b8a4459f4758b85d5cf102eceed0adc1beb4a","version":5}]}