/**
 * @license
 * Copyright 2025 Steven Roussey <sroussey@gmail.com>
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * Thrown synchronously from validateInput() when the requested model cannot
 * support a feature on the provided input (e.g., Gemini + mask, HF + multiple images).
 * Surfaces before any worker/queue dispatch.
 */
export declare class ProviderUnsupportedFeatureError extends Error {
    readonly field: string;
    readonly modelId: string;
    readonly retryable = false;
    constructor(field: string, modelId: string, detail: string);
}
/**
 * Thrown when a provider returns a content-policy refusal (OpenAI moderation,
 * Gemini SAFETY block, HF NSFW filter). Non-retryable.
 */
export declare class ImageGenerationContentPolicyError extends Error {
    readonly modelId: string;
    readonly providerReason: string;
    readonly retryable = false;
    constructor(modelId: string, providerReason: string);
}
/**
 * Wraps any other provider failure (rate limits, transient 5xx, malformed responses).
 * Retryable per the existing job-queue retry policy.
 */
export declare class ImageGenerationProviderError extends Error {
    readonly modelId: string;
    readonly retryable = true;
    constructor(modelId: string, message: string, options?: ErrorOptions);
}
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