{"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-6487y397","versions":[{"created_at":"2026-06-10T23:00:49Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote20693313 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"130ae274eae3e297bbfba166561bf574e0e832a67e138633d069710ec3b98f5e","version":9},{"created_at":"2026-06-10T21:43:57Z","element_count":72,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"c9c966e4a68cde469a97aad69f8fde313c2fcf20c5597bc985fe0e77c6c7b956","version":3}]}