import type { BtwHint } from '../../types/index.js';
/**
 * Returns true if /btw should be suggested based on context usage.
 * Suggests /btw when context >= 60% to avoid contaminating session.
 */
export declare function shouldSuggestBtw(contextPercent: number): boolean;
/**
 * Builds a formatted hint explaining /btw and when to use it.
 */
export declare function buildBtwHint(reason: string): BtwHint;
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