/**
 * Capture Agent — LLM Provider
 *
 * Thin wrapper around OpenAI SDK for OpenRouter calls.
 * Used by: capture verification, alt text generation, healer.
 */
export interface LLMCallResult {
    text: string;
    model: string;
    promptTokens: number;
    completionTokens: number;
    costEur: number;
    /** OpenRouter generation ID for async cost resolution */
    generationId: string | null;
}
export interface LLMProviderConfig {
    apiKey: string;
    /** Model to use. Default: google/gemini-2.5-flash */
    model?: string;
    /** Max tokens for response. Default: 200 */
    maxTokens?: number;
    /** Timeout in ms. Default: 15000 */
    timeoutMs?: number;
}
/**
 * Makes a single LLM call with optional image input.
 * Returns the text response and usage metadata.
 */
export declare function callLLM(config: LLMProviderConfig, systemPrompt: string, userContent: string, image?: Buffer): Promise<LLMCallResult>;