/**
 * Configuration validation helpers - handles input validation and provider configuration
 */
import type { Config } from './schema.js';
/**
 * Provider configuration labels and defaults (generated from PROVIDER_REGISTRY)
 */
export declare const PROVIDER_LABELS: Record<string, string>;
export declare const DEFAULT_MODELS: Record<string, string>;
/**
 * Order provider keys for display: alphabetical by label (case-insensitive),
 * with the built-in `local` provider always pinned last. Plugin-contributed
 * providers are sorted alongside the built-ins.
 */
export declare function sortProviderKeysForDisplay(keys: string[], labelOf: (key: string) => string): string[];
/**
 * Available provider choices for setup wizard (queries the catalog at call time).
 * Providers are listed alphabetically by label, with Local always last.
 */
export declare function getProviderChoices(): Array<{
    checked?: boolean;
    name: string;
    value: string;
}>;
/**
 * Quick setup provider choices (queries the catalog at call time).
 * Providers are listed alphabetically by label, with Local always last.
 * No-API-key providers are annotated so users can spot the zero-config options.
 */
export declare function getQuickSetupChoices(): Array<{
    name: string;
    value: string;
}>;
/**
 * Configure a specific LLM provider
 */
export declare function configureProvider(providerName: string, config: Config): Promise<void>;
/**
 * Configure default preferences
 */
export declare function configureDefaults(config: Config): Promise<void>;
/**
 * Validate API key input
 */
export declare function validateApiKey(input: string): boolean | string;
/**
 * Filter out skip option from provider selection
 */
export declare function filterValidProviders(providers: string[]): string[];
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