import { type ITokenizer } from './ITokenizer.js';
export declare class AnthropicTokenizer implements ITokenizer {
    /**
     * Count tokens for Anthropic models
     *
     * Anthropic uses a tokenizer similar to Claude's tiktoken-based tokenizer.
     * Since there's no official @anthropic-ai/tokenizer package available,
     * we use a character-based estimation that aligns with typical Claude tokenization:
     * - Average ~3.5-4 characters per token for English text
     * - More conservative estimate for code and special characters
     *
     * This estimation should be within 10-15% of actual token counts for most content.
     *
     * @param text The text to tokenize
     * @param model The model name (for model-specific tokenization if needed)
     * @returns Estimated token count
     */
    countTokens(text: string, _model: string): Promise<number>;
}