export interface Tip {
    text: string;
    badge?: 'new';
}
export declare const TIP_INTERVAL_MS = 45000;
export declare const TIPS: Tip[];
/**
 * Returns the tip to display at the given wall-clock time.
 * nowMs defaults to Date.now(); pass an explicit value in tests for determinism.
 */
export declare function selectTip(sessionStartMs: number, nowMs?: number): Tip;
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