export type DetectedContentType = 'json' | 'markdown' | 'text';
export interface DetectContentTypeOptions {
    /**
     * Markdown detection mode:
     * - `strict`: conservative heading/link/fence patterns (legacy contract/golden behavior)
     * - `lenient`: broader markdown indicators (legacy smart-truncate behavior)
     */
    markdownHeuristics?: 'strict' | 'lenient';
}
/**
 * Detect whether content is JSON, Markdown, or plain text.
 */
export declare function detectContentType(content: string, options?: DetectContentTypeOptions): DetectedContentType;
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