/**
 * System overview — one call, complete picture.
 *
 * Composes triage, throughput, trends, infrastructure, and process
 * metrics from lt_* tables. All queries run in parallel. No HotMesh
 * schema dependencies — safe regardless of engine initialization state.
 */
export interface SystemOverview {
    period: string;
    triage: {
        pending: number;
        claimed: number;
        unclaimed: number;
        aging_30m: number;
        aging_1h: number;
        aging_24h: number;
        oldest_unclaimed_minutes: number;
        created_period: number;
        resolved_period: number;
        resolution_rate_pct: number;
        by_role: Array<{
            role: string;
            pending: number;
            claimed: number;
        }>;
    };
    throughput: {
        tasks_pending: number;
        tasks_in_progress: number;
        tasks_failed: number;
        tasks_created_1h: number;
        tasks_completed_1h: number;
        tasks_created_period: number;
        tasks_completed_period: number;
        tasks_failed_1h: number;
    };
    trends: {
        escalation_creation: Array<{
            hour: string;
            created: number;
        }>;
        task_completion: Array<{
            hour: string;
            completed: number;
        }>;
        resolution_velocity: Array<{
            hour: string;
            created: number;
            resolved: number;
        }>;
    };
    infrastructure: {
        mcp_servers: {
            total: number;
            connected: number;
            total_tools: number;
        };
        compiled_workflows: {
            total: number;
            active: number;
        };
        agents: {
            total: number;
            active: number;
            paused: number;
            error: number;
            stale: number;
        };
        workflow_configs: number;
    };
    processes: {
        total: number;
        active: number;
        completed: number;
        escalated: number;
    };
}
export declare function getSystemOverview(period?: string): Promise<SystemOverview>;