/**
 * JSON Content Handler
 *
 * Handles application/json content type. Recursively traverses all nodes in the JSON
 * object tree and applies the full injection pattern registry to every string value.
 *
 * What it handles:
 * - All string values in the JSON tree (any depth)
 * - Arrays, nested objects, and mixed-type arrays
 * - Falls back to plain text pipeline if JSON.parse fails
 *
 * What it strips:
 * - Nothing (preserves original structure)
 *
 * What it passes through:
 * - Sanitized JSON with original structure preserved
 * - All non-string values pass through unchanged
 */
import type { HandlerResult } from './types.js';
/**
 * Handle JSON content
 *
 * @param content - Raw JSON string
 * @param mimeType - Original MIME type
 * @returns Sanitized handler result
 */
export declare function handleJson(content: string | Buffer, mimeType: string): HandlerResult;
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