import type { HandlerResult } from '../mcp.types.js';
/**
 * Wrap a structured payload as a handler success that satisfies the MCP
 * outputSchema contract. The same payload is emitted both as a JSON text
 * content block (for lenient clients) and as `structuredContent` (required
 * by strict clients per MCP spec revision 2025-06-18).
 *
 * `extraContent` is prepended for handlers that also return non-text blocks
 * (e.g. `take_screenshot`'s inline image).
 */
export declare function createStructuredResponse<T extends Record<string, unknown>>(payload: T, extraContent?: Array<{
    type: string;
    [k: string]: unknown;
}>): HandlerResult;
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