/**
 * QA360 Core Observability Server
 * Endpoints: /health, /diag, /metrics, /cancel
 */
export interface ServeConfig {
    port: number;
    host?: string;
    metrics?: boolean;
    readinessCheck?: boolean;
    verbose?: boolean;
}
export interface ServeResponse {
    status: number;
    headers: Record<string, string>;
    body: string;
}
export declare class QA360Server {
    private config;
    private server?;
    private healthChecker;
    private diagnosticsCollector;
    private metricsCollector;
    private processManager;
    private redactor;
    private startTime;
    constructor(config: ServeConfig);
    start(): Promise<void>;
    stop(): Promise<void>;
    private handleRequest;
    private routeRequest;
    private handleHealth;
    private handleDiagnostics;
    private handleMetrics;
    private handleCancel;
    private log;
}