{"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-e1erlytn","versions":[{"created_at":"2026-06-10T22:52:37Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87413760→quote24047756 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"89c885e699131b164cee6f946948de281d28e5d8945cb0a1de1e470a2648adcc","version":17},{"created_at":"2026-06-10T14:13:29Z","element_count":71,"note":"5軸GA polish 61->95 by M5 (autonomous)","saved_by":"mcp","sha256":"24156fa66db822ec18a7f66299caac72a9b1971a49929da2f85fb21cc2185f0b","version":6}]}