{"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-whitecityhavenhouse-3wqexleu","versions":[{"created_at":"2026-07-13T21:51:35Z","element_count":56,"note":"5軸GA polish 38->86 by M5 (autonomous)","saved_by":"mcp","sha256":"e7c1dc59584fb5b7bb6134fa23e51c83383499fa320350a06b4aaf253851357f","version":3},{"created_at":"2026-07-13T21:39:00Z","element_count":101,"note":"loop3: 設計時延床 45.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6cddc1aab68cf23630569485a00ac999544be9bd5b36b6363d765ff426fdea38","version":2},{"created_at":"2026-07-13T21:39:00Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}