/**
 * Agent Variant Handling
 *
 * Safely resolves and applies agent variants for thinking modes.
 * Defensive implementation to prevent "undefined is not an object" errors.
 */
import type { ZenoxConfig } from "../config";
export interface VariantMessage {
    model?: {
        providerID?: string;
        modelID?: string;
        variant?: string;
    };
}
/**
 * Safely resolve agent variant from config
 * Returns undefined if agent doesn't exist or has no variant configured
 */
export declare function resolveAgentVariant(config: ZenoxConfig, agentName?: string): string | undefined;
/**
 * Apply agent variant to message if configured
 * Safe for undefined agents - simply does nothing
 */
export declare function applyAgentVariant(config: ZenoxConfig, agentName: string | undefined, message: VariantMessage): void;