{"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-hvsnoxd4","versions":[{"created_at":"2026-06-13T20:00:42Z","element_count":84,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"5d93e5a13452fcbee99e09c6b54459c222a3aabf270133dee8899d0c4f2334fe","version":3},{"created_at":"2026-06-13T19:50:27Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"fb3b816c7f9dd39e80940ec70e973b78cde66f13c2acc85d3fd97a4149d1fb87","version":2},{"created_at":"2026-06-13T19:50:26Z","element_count":87,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}