/**
 * Trace Comparison — Compare two traces side-by-side with detailed diffs.
 */
import type { AgentTrace } from './types';
export interface TraceComparison {
    stepsA: number;
    stepsB: number;
    stepsDiff: number;
    stepTypesA: Record<string, number>;
    stepTypesB: Record<string, number>;
    toolsA: string[];
    toolsB: string[];
    toolsOnlyA: string[];
    toolsOnlyB: string[];
    toolsCommon: string[];
    toolCountsA: Record<string, number>;
    toolCountsB: Record<string, number>;
    tokensA: {
        input: number;
        output: number;
        total: number;
    };
    tokensB: {
        input: number;
        output: number;
        total: number;
    };
    tokensDiffPercent: number;
    costA: number;
    costB: number;
    costDiffPercent: number;
    durationA: number;
    durationB: number;
    durationDiffPercent: number;
    outputA: string;
    outputB: string;
    outputMatch: boolean;
    modelsA: string[];
    modelsB: string[];
}
/**
 * Compare two traces and return a structured comparison.
 */
export declare function compareTraces(traceA: AgentTrace, traceB: AgentTrace): TraceComparison;
/**
 * Format a trace comparison for terminal display.
 */
export declare function formatComparison(cmp: TraceComparison): string;
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