import type { Policy } from '../types.js';
export interface Snapshot {
    sessionId: string;
    rootDir: string;
    files: Map<string, SnapshotEntry>;
    createdAt: Date;
}
export interface SnapshotEntry {
    path: string;
    hash: string;
    size: number;
    snapshotPath: string;
}
/**
 * Create a snapshot of all files matching the policy
 */
export declare function createSnapshot(rootDir: string, policy: Policy, sessionId: string): Promise<Snapshot>;
/**
 * Get the snapshot content for a file
 */
export declare function getSnapshotContent(snapshot: Snapshot, filePath: string): Buffer | null;
/**
 * Check if a file has been modified since snapshot
 */
export declare function hasChanged(snapshot: Snapshot, filePath: string, rootDir: string): boolean;
/**
 * Load an existing snapshot from disk
 */
export declare function loadSnapshot(sessionId: string): Snapshot | null;
/**
 * Clean up a snapshot session
 */
export declare function cleanupSnapshot(sessionId: string): void;
/**
 * Generate a unique session ID
 */
export declare function generateSessionId(): string;
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