{"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-swxtd6wx","versions":[{"created_at":"2026-06-10T23:06:59Z","element_count":71,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote27129351 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"df5adbef53d79073923980e7b13c1f606702b172062e54dabf5871459b9025c6","version":9},{"created_at":"2026-06-10T22:52:03Z","element_count":71,"note":"5軸GA polish 60->96 by M5 (autonomous)","saved_by":"mcp","sha256":"d2c2a865bb00e7457c6179828cee4467b6ad5da9f1ec4317de6c00d09db2679b","version":8}]}