{"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-xkyag3q4","versions":[{"created_at":"2026-06-15T19:36:51Z","element_count":89,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"74c7f581a9b345853b2ce9dad2c8e676fa3b8c8175f1ff8b3786b9eaa97fe2b5","version":3},{"created_at":"2026-06-15T19:23:23Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"98423a7fa8a092cd4449e7a39ff321bb9b365be7880fad1171107fa7569073b7","version":2},{"created_at":"2026-06-15T19:23:22Z","element_count":101,"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}]}