{"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-km27zej5","versions":[{"created_at":"2026-06-10T22:58:57Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote19396944 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"d0ffec6bf85b3da2247819939885a5eaa9a58592de0b5f47169cd42c0040b8e2","version":9},{"created_at":"2026-06-10T20:22:38Z","element_count":71,"note":"5軸GA polish 58->97 by M5 (autonomous)","saved_by":"mcp","sha256":"cadfcf3a29b10e5f93b5a03d476d5a82dd60dd186f2e538412d7bf778d4ea890","version":2}]}