/**
 * Built-in Plugin: Cost Tracker
 *
 * Track and limit costs per test and per suite.
 * Accumulates token usage from traces and enforces budget limits.
 */
import type { AgentProbePlugin } from '../plugins';
import type { TestResult } from '../types';
export interface CostTrackerConfig {
    /** Maximum cost per individual test in USD */
    maxCostPerTest?: number;
    /** Maximum cost per suite in USD */
    maxCostPerSuite?: number;
    /** Whether to warn (log) or throw on budget exceeded */
    mode?: 'warn' | 'enforce';
    /** Callback when cost exceeds limit */
    onBudgetExceeded?: (test: string, cost: number, limit: number) => void;
}
export interface CostRecord {
    testName: string;
    cost: number;
    inputTokens: number;
    outputTokens: number;
    model: string;
}
export declare class CostTracker {
    private records;
    private suiteCost;
    readonly config: CostTrackerConfig;
    constructor(config?: CostTrackerConfig);
    recordTest(result: TestResult): CostRecord | null;
    checkSuiteBudget(): boolean;
    getRecords(): CostRecord[];
    getTotalCost(): number;
    reset(): void;
    formatReport(): string;
}
/**
 * Create the cost-tracker plugin instance.
 */
export declare function createCostTrackerPlugin(config?: CostTrackerConfig): AgentProbePlugin & {
    tracker: CostTracker;
};
export default createCostTrackerPlugin;
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