Interface AgentUsageEvent

interface AgentUsageEvent {
    anonymous_id: string;
    timestamp: string;
    sdk_version: string;
    node_version: string;
    os_platform: string;
    event: "agent_execution";
    agent_type: string;
    agent_version?: string;
    success: boolean;
    duration_ms: number;
    cost?: number;
    task_type?: string;
    error_type?: string;
}