/**
 * Configuration Merger for AgentRouter
 *
 * Provides utilities for deep merging configuration objects.
 * Used by ConfigManager to combine configs from multiple sources.
 */
import type { Config } from '../types.js';
/**
 * Configuration merger utility class.
 * Handles deep merging of configuration objects with specific merge rules.
 */
export declare class ConfigMerger {
    /**
     * Deep merge two configuration objects.
     * Source values override target values.
     * Objects are merged recursively, arrays are replaced.
     *
     * @param target - Base configuration
     * @param source - Configuration to merge on top
     * @returns Merged configuration
     */
    merge(target: Config, source: Partial<Config>): Config;
    /**
     * Merge default configuration values.
     *
     * @param target - Base defaults
     * @param source - Defaults to merge
     * @returns Merged defaults
     */
    private mergeDefaults;
    /**
     * Merge role configurations.
     * Roles from source are merged into target.
     * Individual role properties are deep merged.
     *
     * @param target - Base roles
     * @param source - Roles to merge
     * @returns Merged roles
     */
    private mergeRoles;
    /**
     * Merge a single role configuration.
     *
     * @param target - Base role config
     * @param source - Role config to merge
     * @returns Merged role config
     */
    private mergeRoleConfig;
    /**
     * Merge provider configurations.
     * Providers from source are merged into target.
     * Individual provider properties are deep merged.
     *
     * @param target - Base providers
     * @param source - Providers to merge
     * @returns Merged providers
     */
    private mergeProviders;
    /**
     * Merge a single provider configuration.
     *
     * @param target - Base provider config
     * @param source - Provider config to merge
     * @returns Merged provider config
     */
    private mergeProviderConfig;
}
/**
 * Convenience function to merge two configs.
 *
 * @param target - Base configuration
 * @param source - Configuration to merge on top
 * @returns Merged configuration
 */
export declare function mergeConfigs(target: Config, source: Partial<Config>): Config;
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