import type { Candidate } from "./candidates.js";
export type PromptBudget = {
    readonly perRequestMaxBytes: number;
    readonly totalMaxBytes: number;
};
export type PromptBudgetFailure = "request" | "total";
export type PromptBudgetResult = {
    readonly ok: true;
} | {
    readonly ok: false;
    readonly reason: PromptBudgetFailure;
};
export type PromptBudgetTracker = {
    readonly add: (candidate: Candidate) => PromptBudgetResult;
};
export declare function buildPromptText(condition: string, candidates: readonly Candidate[]): string;
export declare function batchCandidates(condition: string, candidates: readonly Candidate[], maxBytes?: number): readonly (readonly Candidate[])[];
export declare function createPromptBudgetTracker(condition: string, budget: PromptBudget): PromptBudgetTracker;
export declare function totalPromptBytes(condition: string, batches: readonly (readonly Candidate[])[]): number;
export declare function promptBytes(condition: string, candidates: readonly Candidate[]): number;
export declare function fixedPromptBytes(condition: string): number;
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