/**
 * Utility class for optimizing prompt size before sending to AI models.
 *
 * For Models: gpt-4o-mini-realtime-preview and gpt-4o-realtime-preview
 *    Max Prompt Size (): 128,000 tokens
 *
 * Truncation Strategy:
 * - Removes 10% of the prompt length from the end each iteration
 * - Continues until token count is safely under MAX_TOKENS
 *
 * Example with a 10-word sentence (each word = 1 token) and MAX_TOKENS = 7:
 * 1. "The quick white fox jumps over the lazy dog today" (10 tokens)
 * 2. "The quick white fox jumps over the lazy dog" (9 tokens)
 * 3. "The quick white fox jumps over the" (8 tokens)
 * 4. "The quick white fox jumps over" (7 tokens)
 * 5. "The quick white fox jumps" (6 tokens) ✓
 *
 * We remove from the end because:
 * - Important context is usually at the beginning of prompts
 * - System instructions and core functionality are typically defined first
 * - Later parts often contain supplementary information
 */
export declare class PromptSizeOptimizer {
    /**
     * Optimizes the size of a prompt to ensure it fits within model requirements.
     * @param prompt The input prompt to optimize
     * @returns An object with the optimized prompt and its token size
     */
    static optimize(originalPrompt: string): {
        prompt: string;
        tokenSize: number;
    };
    /**
     * Truncates the prompt by removing 10% from the end each iteration until it fits within token limits.
     * @param prompt The prompt to truncate
     * @param encoder The token encoder to use
     * @returns The truncated prompt that fits within token limits
     */
    private static truncatePrompt;
}