/**
 * Utility to extract <think> tags from text content and normalize them
 * into structured thinking metadata. This is used for models like
 * DeepSeek R1 or Sonar that return thinking traces within the main text.
 */
export declare class ThinkingNormalizer {
    /**
     * Extracts <think>...</think> blocks from content.
     * Returns the cleaned content and the extracted thinking text.
     */
    static normalize(content: string): {
        content: string;
        thinking?: string;
    };
}
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