{"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-d6hluw08","versions":[{"created_at":"2026-06-10T22:56:09Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy81784771→quote21425095 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"db240a4ab466ea817401d1db06eec1404dd2770d89ef8e0d4c102731b19d4534","version":10},{"created_at":"2026-06-10T18:29:54Z","element_count":84,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"372f6649517390a89bdc73fae52618d71c6cd6d10ffe0cc4890597632b0342b9","version":3}]}