import { BaseAIOptions, TokenUsage, UsageEvent } from '../types';
/**
 * Emit a usage event to the `onUsage` callback configured on provider options.
 *
 * @param providerOptions  - The provider's stored options (for `onUsage` and global `usageTags`).
 * @param providerName     - Provider identifier (e.g. `'openai'`).
 * @param operation        - The operation type that generated this usage.
 * @param model            - Model that was used.
 * @param usage            - Token usage breakdown, if available.
 * @param startTime        - `Date.now()` captured before the API call.
 * @param callTags         - Per-call `usageTags` from the method's options.
 */
export declare function emitUsage(providerOptions: BaseAIOptions, providerName: string, operation: UsageEvent['operation'], model: string, usage: TokenUsage | undefined, startTime: number, callTags?: Record<string, string>): void;
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