{"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-er81t1r8","versions":[{"created_at":"2026-06-10T23:00:24Z","element_count":62,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote20576137 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7d5fa654c12defd63150263301ae6600ba4a4ecfd809964f12172c62d71142f6","version":9},{"created_at":"2026-06-10T21:27:47Z","element_count":73,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"d3d323bbfc0f8f6c706022a3427dcf0bfaa76139d28f97e322bea16f6b6db848","version":3}]}