/**
 * Help event handler — `if.event.help_displayed`.
 *
 * Produces the canonical "HOW TO PLAY INTERACTIVE FICTION" block.
 * Content based on the PR-IF "How to Play" reference card.
 *
 * Public interface: `handleHelpDisplayed`. Used by the pipeline's
 * event-type dispatch.
 *
 * Owner context: `@sharpee/engine` — internal prose pipeline.
 *
 * @see ADR-174 §Engine-internal prose pipeline (port from text-service)
 */
import type { ITextBlock } from '@sharpee/text-blocks';
import type { ISemanticEvent } from '@sharpee/core';
import type { HandlerContext } from './types';
/**
 * Handle `if.event.help_displayed` to produce the help text block.
 */
export declare function handleHelpDisplayed(_event: ISemanticEvent, _context: HandlerContext): ITextBlock[];
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