import type { WebSocket } from "ws";
export type SnapshotRouteRegistration = "registered" | "duplicate" | "retry_due" | "collision" | "client_capacity_exceeded" | "capacity_exceeded";
export type SnapshotRouteResolution = {
    kind: "matched";
    clientWs: WebSocket;
} | {
    kind: "stale_proxy";
} | {
    kind: "tombstone";
} | {
    kind: "unmatched";
};
export interface PtySnapshotRouteRegistryOptions {
    maxEntries?: number;
    maxPendingPerClient?: number;
    retryForwardIntervalMs?: number;
    pendingTtlMs?: number;
    tombstoneTtlMs?: number;
    now?: () => number;
}
/**
 * Correlates a request-scoped PTY snapshot with the exact browser socket that requested it.
 * Entries are capacity- and TTL-bounded; tombstones retain no socket reference and ensure a
 * response arriving after disconnect is dropped rather than falling back to a broadcast.
 */
export declare class PtySnapshotRouteRegistry {
    private readonly routes;
    private readonly maxEntries;
    private readonly maxPendingPerClient;
    private readonly retryForwardIntervalMs;
    private readonly pendingTtlMs;
    private readonly tombstoneTtlMs;
    private readonly now;
    constructor(options?: PtySnapshotRouteRegistryOptions);
    register(proxyId: string, sessionId: string, requestId: string, clientWs: WebSocket, proxyWs: WebSocket): SnapshotRouteRegistration;
    resolve(proxyId: string, sessionId: string, requestId: string, proxyWs: WebSocket): SnapshotRouteResolution;
    abandonSocket(clientWs: WebSocket): void;
    clearProxy(proxyId: string): void;
    private pruneExpired;
}
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