{"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-jts7hpz0","versions":[{"created_at":"2026-06-10T22:57:51Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy44363808→quote20424136 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"34fb9345219509598a54de7cc4535f98d0d20250b3f63ec30fbc51d95b56a975","version":9},{"created_at":"2026-06-10T19:34:23Z","element_count":84,"note":"5軸GA polish 60->94 by M5 (autonomous)","saved_by":"mcp","sha256":"441c8e5e991cecf5895203c782209821770f8a4f2c7362f64f5f08a5a312ee31","version":2}]}