import type { WebSocketConnection } from "../../../platform/adapters/base.js";
/** Client metadata for observability */
export interface HMRClientInfo {
    id: string;
    socket: WebSocketConnection;
    connectedAt: number;
    projectSlug?: string;
    userAgent?: string;
    lastActivity: number;
}
/** Detailed client info for the status endpoint (no socket reference) */
interface HMRClientDetail {
    id: string;
    connectedAt: number;
    projectSlug?: string;
    lastActivity: number;
    connectionDurationMs: number;
}
export declare function getClientCount(): number;
export declare function addClient(info: HMRClientInfo): void;
export declare function removeClient(clientId: string): void;
export declare function getClient(clientId: string): HMRClientInfo | undefined;
export declare function getClientDetails(): HMRClientDetail[];
/**
 * Get all open WebSocket connections, optionally filtered by projectSlug.
 * This replaces the old exported `clientSockets` Set that drifted out of sync.
 */
export declare function getOpenSockets(projectSlug?: string): WebSocketConnection[];
export declare function clearAll(): void;
export {};
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