/**
 * Agent Diff Report — Compare two versions of an agent based on traces.
 */
import type { AgentTrace } from './types';
export interface AgentVersion {
    traces: AgentTrace[];
    tools: Set<string>;
    avgSteps: number;
    avgCost: number;
    avgDuration: number;
}
export interface AgentDiff {
    addedTools: string[];
    removedTools: string[];
    unchangedTools: string[];
    stepsChange: {
        v1: number;
        v2: number;
        pct: number;
    };
    costChange: {
        v1: number;
        v2: number;
        pct: number;
    };
    durationChange: {
        v1: number;
        v2: number;
        pct: number;
    };
    qualityEstimate: {
        v1: number;
        v2: number;
        pct: number;
    };
    newBehaviors: string[];
    lostBehaviors: string[];
}
/**
 * Load traces from a directory.
 */
export declare function loadTraces(dir: string): AgentTrace[];
/**
 * Analyze a set of traces into an AgentVersion summary.
 */
export declare function analyzeVersion(traces: AgentTrace[]): AgentVersion;
/**
 * Compute diff between two agent versions.
 */
export declare function diffVersions(v1: AgentVersion, v2: AgentVersion): AgentDiff;
/**
 * Compare two sets of traces directly.
 */
export declare function compareTraces(v1Traces: AgentTrace[], v2Traces: AgentTrace[]): AgentDiff;
/**
 * Format the diff report.
 */
export declare function formatAgentDiff(diff: AgentDiff): string;
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