import type { LimitCheckerConfig, StopReason } from '../types/session/index.js';
export interface LimitCheckerState {
    aborted: boolean;
    totalTokens: number;
    totalCost: number;
    /**
     * Tokens accumulated at no known rate, from `CostInfo.unpricedTokens`.
     *
     * The cost checks below read `totalCost`, and `totalCost` omits whatever
     * these cost. Without this field they cannot tell a turn that has spent
     * nothing from one whose spend was never computed, so a `costLimitUsd`
     * silently never fires — which is what every turn did, because nothing fed
     * the cost calculation at all.
     */
    unpricedTokens: number;
    currentIteration: number;
    startTime: number;
}
export type LimitCheckResult = {
    type: 'ok';
} | {
    type: 'warning';
    reason: StopReason;
} | {
    type: 'hard_stop';
    reason: StopReason;
};
export declare function checkLimitsDetailed(config: LimitCheckerConfig, state: LimitCheckerState): LimitCheckResult;
export declare function buildLimitConfig(tokenBudget: number, timeoutMs: number, costLimitUsd?: number, maxIterations?: number, budgetWarningThreshold?: number): LimitCheckerConfig;
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