/**
 * AgentRegistry - Tracks connected agents
 *
 * Responsibilities:
 * - Maintain registry of connected agents
 * - Provide query capabilities
 * - Clean up on disconnect
 */
import type { AgentInfo } from "../transport";
import { AgentConnectionInfo } from "./types";
export declare class AgentRegistry {
    private readonly agents;
    /**
     * Register a new agent connection.
     */
    add(agentInfo: AgentInfo): AgentConnectionInfo;
    /**
     * Unregister an agent.
     */
    remove(agentId: string): boolean;
    /**
     * Get agent info by ID.
     */
    get(agentId: string): AgentConnectionInfo | undefined;
    /**
     * Get all connected agents.
     */
    getAll(): AgentConnectionInfo[];
    /**
     * Query agents by criteria.
     */
    query(criteria: {
        context?: string;
        tabId?: number;
        frameId?: number;
    }): AgentConnectionInfo[];
    /**
     * Check if an agent is registered.
     */
    has(agentId: string): boolean;
    /**
     * Get the number of connected agents.
     */
    get size(): number;
    /**
     * Clear all agents.
     */
    clear(): void;
}