/**
 * `/help` slash command handler.
 *
 * Displays available commands and loaded skills.
 * Use `--all` to include hidden commands and aliases.
 */
import type { CommandHandler, CommandRegistry } from './registry.js';
import type { SkillRegistry } from '../../../skills/types.js';
export declare function createHelpHandler(registry: CommandRegistry, skillRegistry?: SkillRegistry | null): CommandHandler;