{"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-5a8jpo8u","versions":[{"created_at":"2026-06-10T22:52:37Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote21237329 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"e4ed19a6eefea39c851bf76182f70653eb0a8c8132d53e2d11f90f0d9cc69684","version":17},{"created_at":"2026-06-10T14:13:20Z","element_count":85,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"a72709ab9ce82b364f8404c0417a1a0900128706d06ce81a49aabef0f57421e7","version":6}]}