/**
 * Snapshot Testing — v4.9.0 Enhanced
 *
 * Full snapshot manager with capture, compare, update, and diff.
 * Snapshots stored in __snapshots__/ as JSON.
 */
import type { AgentTrace, TraceStep } from './types';
export interface AgentResponse {
    output: string;
    toolCalls: Array<{
        name: string;
        args?: Record<string, any>;
        result?: any;
    }>;
    steps: TraceStep[];
    metadata?: Record<string, any>;
}
export interface SnapshotData {
    testId: string;
    timestamp: string;
    toolsCalled: string[];
    toolCallOrder: string[];
    outputHash: string;
    stepCount: number;
    stepTypes: string[];
    hasOutput: boolean;
}
export interface SnapshotFieldDiff {
    field: string;
    expected: any;
    actual: any;
}
export interface SnapshotDiff {
    testId: string;
    match: boolean;
    addedTools: string[];
    removedTools: string[];
    changedResponses: SnapshotFieldDiff[];
    newBehaviors: string[];
}
export interface SnapshotConfig {
    updateSnapshots: boolean;
    snapshotDir: string;
}
export interface BehaviorSnapshot {
    toolsCalled: string[];
    toolCallOrder: string[];
    hasOutput: boolean;
    stepCount: number;
    stepTypes: string[];
}
export declare class SnapshotManager {
    private snapshotDir;
    constructor(snapshotDir?: string);
    private _path;
    private _responseToData;
    capture(testId: string, response: AgentResponse): void;
    compare(testId: string, response: AgentResponse): SnapshotDiff;
    update(testId: string): void;
    exists(testId: string): boolean;
    delete(testId: string): boolean;
    list(): string[];
    formatDiff(diff: SnapshotDiff): string;
}
export declare function extractSnapshot(trace: AgentTrace): BehaviorSnapshot;
export declare function matchSnapshot(trace: AgentTrace, testName: string, config: SnapshotConfig): {
    match: boolean;
    diff?: string;
    created?: boolean;
    updated?: boolean;
};
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