/**
 * Infers a model's API provider from its id prefix
 * (docs/plans/token-cost-tracking-plan.md §8: "derive `provider` from model id
 * prefix when the transcript doesn't state it"). Returns `undefined` rather
 * than guessing wrong for an id we don't recognize.
 */
export declare function inferProviderFromModel(model: string): string | undefined;
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