{"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-icg0uttp","versions":[{"created_at":"2026-06-10T23:00:13Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote20370449 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7791ac1e9ee9145849db8539df745ae8cce9703da9e4f6ba0155f777511a3cb8","version":9},{"created_at":"2026-06-10T21:11:19Z","element_count":84,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"c609b87402c29031eb5f8184446b9051b89f89a1f7e4cabde0889fe33a8bbbb8","version":3}]}