import type { AiModelConfig, ProviderFactory, ProviderAdapter, RerankingAdapter, FileAdapter, VectorStoreAdapter } from './types.js';
/**
 * Try a list of provider/model strings in order until one succeeds.
 *
 * Used by the media-generation paths (Image, Audio, Transcription) to give
 * the same failover ergonomics agents already have. The first model is the
 * "primary"; the rest are fallbacks. Errors from earlier candidates are
 * swallowed; only the last error is thrown if every candidate fails.
 *
 * The agent loop has its own failover wired into LoopContext (telemetry,
 * abort handling, observer attempts counter). This is a simpler helper for
 * single-shot calls outside the agent loop.
 *
 * @param primary    The user's chosen model string (e.g. `'openai/dall-e-3'`).
 * @param fallbacks  Additional candidates to try on failure.
 * @param call       Receives each candidate model string and runs the work.
 */
export declare function tryWithFailover<T>(primary: string, fallbacks: readonly string[], call: (modelString: string) => Promise<T>): Promise<T>;
export declare class AiRegistry {
    /** Register a provider factory */
    static register(factory: ProviderFactory): void;
    /** Get a registered provider factory by name */
    static getFactory(name: string): ProviderFactory;
    /** Set the default provider/model string */
    static setDefault(modelString: string): void;
    /** Get the default provider/model string */
    static getDefault(): string;
    /** Parse 'provider/model' string into [providerName, modelId] */
    static parseModelString(modelString: string): [string, string];
    /** Resolve a provider/model string to a ProviderAdapter */
    static resolve(modelString: string): ProviderAdapter;
    /** Resolve a provider/model string to a RerankingAdapter */
    static resolveReranking(modelString: string): RerankingAdapter;
    /** Resolve a file adapter for a provider name */
    static resolveFiles(providerName: string): FileAdapter;
    /** Resolve a vector-store adapter for a provider name (#B8) */
    static resolveVectorStores(providerName: string): VectorStoreAdapter;
    /** Set available models for user selection */
    static setModels(models: AiModelConfig[]): void;
    /** Get available models */
    static getModels(): AiModelConfig[];
    /** Test-cleanup hook (public — other packages reset across the boundary). */
    static reset(): void;
}
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