/**
 * Channel Registry — Singleton that manages all adapter instances.
 *
 * Bot connections are expensive and stateful — shared across MCP sessions.
 * Each adapter is created based on env vars, connected on demand or auto-connect.
 */
import type { ChannelAdapter, ChannelState, Platform } from './adapter.js';
export declare class ChannelRegistry {
    private adapters;
    register(adapter: ChannelAdapter): void;
    get(platform: Platform): ChannelAdapter | undefined;
    getAll(): ChannelAdapter[];
    /** Connect all registered adapters. Returns error map (null = success). */
    connectAll(): Promise<Map<Platform, Error | null>>;
    disconnectAll(): Promise<void>;
    getStatus(): Array<{
        platform: Platform;
        state: ChannelState;
        bufferedMessages: number;
    }>;
    get size(): number;
}
export declare function getOrCreateRegistry(): ChannelRegistry;
/** Reset singleton (for testing). */
export declare function resetRegistry(): void;
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