{"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-zlcbtw45","versions":[{"created_at":"2026-06-10T22:59:55Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote21141931 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a0fd9000e2c6b384f977afdc7369de8f52637e110e76dc95bb71d1d82b85036f","version":9},{"created_at":"2026-06-10T20:55:03Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"c9e034cc102a25dedc9c01eac61e848237247cd9c4f315bf2962484cc965e031","version":3}]}