/**
 * YuiHub V1 Authentication Module
 * File-based Handshake: Token is written to DATA_DIR/.token
 */
export interface AuthToken {
    token: string;
    created_at: string;
}
/**
 * Generate a new auth token
 */
export declare function generateToken(): string;
/**
 * Get the token file path
 */
export declare function getTokenPath(dataDir: string): string;
/**
 * Initialize authentication - generate token if not exists
 * This is called on backend startup
 */
export declare function initAuth(dataDir: string): Promise<AuthToken>;
/**
 * Read token from file (for MCP Server / VSCode Client)
 */
export declare function readToken(dataDir: string): Promise<string | undefined>;
/**
 * Validate a token against the stored token
 */
export declare function validateToken(dataDir: string, token: string): Promise<boolean>;
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