/**
 * Anthropic API Client
 *
 * Fetch-based Claude API client — no SDK dependency.
 */
/** Default model — uses the latest Sonnet via alias */
export declare const CLAUDE_MODEL: string;
export declare const CLAUDE_MAX_TOKENS = 2048;
/** Approximate pricing (per million tokens) — used for cost display only */
export declare const CLAUDE_PRICING: {
    readonly input: 15;
    readonly output: 75;
};
/** A text block in a Claude API response */
export interface TextBlock {
    type: 'text';
    text: string;
}
/** Claude Messages API response shape */
interface MessageResponse {
    id: string;
    type: 'message';
    role: 'assistant';
    content: Array<TextBlock | {
        type: string;
    }>;
    model: string;
    stop_reason: string;
    usage: {
        input_tokens: number;
        output_tokens: number;
    };
}
/** Content block sent to the API */
type ContentBlock = {
    type: 'text';
    text: string;
} | {
    type: 'image';
    source: {
        type: 'base64';
        media_type: string;
        data: string;
    };
};
/**
 * Call the Claude Messages API using fetch.
 */
export declare function callClaude(payload: {
    model: string;
    max_tokens: number;
    messages: Array<{
        role: 'user' | 'assistant';
        content: ContentBlock[];
    }>;
}): Promise<MessageResponse>;
export {};
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