/**
 * Public broadcast channel (maps to a Socket.io room).
 */
export declare class Channel {
    readonly name: string;
    constructor(name: string);
    toString(): string;
}
/**
 * Private channel — requires authentication.
 * Socket.io room prefixed with `private-`.
 */
export declare class PrivateChannel extends Channel {
    constructor(name: string);
}
/**
 * Presence channel — authenticated + exposes member list.
 * Socket.io room prefixed with `presence-`.
 */
export declare class PresenceChannel extends Channel {
    constructor(name: string);
}
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