import type { CacheStats, TokenCounter, Usage } from '@wrongstack/core/types';
import type { EventBus } from '@wrongstack/core/kernel';
export interface TokenRefreshData {
    usage: Usage;
    /** Last request prompt tokens from the counter, used when provider usage is unavailable. */
    currentRequest: {
        input: number;
        cacheRead: number;
        cacheWrite?: number | undefined;
    };
    cost: {
        input: number;
        output: number;
        total: number;
        currency: 'USD';
    };
    cacheStats: CacheStats;
}
export declare function snapshotTokenCounter(tokenCounter: TokenCounter): TokenRefreshData;
/**
 * Subscribes to `token.accounted` events and forces a re-render so StatusBar
 * always shows fresh token/cost data without waiting for the slow polling
 * interval that would otherwise gate them.
 *
 * Without this hook, the StatusBar reads from a mutable `tokenCounter`
 * object on each render, but React only re-renders when state/props change.
 * The tokenCounter is mutated by `account()` calls that arrive asynchronously
 * from provider responses, causing stale data for up to 10 seconds.
 */
export declare function useTokenCounterRefresh(tokenCounter: TokenCounter | undefined, events: EventBus | undefined, sessionId?: string | undefined): TokenRefreshData | undefined;
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