{"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-jheg838m","versions":[{"created_at":"2026-06-10T23:07:11Z","element_count":73,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote27208663 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7a1191cbddd8ff15f3de20c86883c60641c41a91f59f830b00c2b51f35c3c12f","version":9},{"created_at":"2026-06-10T22:52:03Z","element_count":73,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"961c43a863481b6d9a4b1b5ad762caa06ce8ad440aef7a1141ee61e53c199c54","version":8}]}