import type { Request, Response, NextFunction } from "express";
export declare function getTokenFilePath(projectRoot: string): string;
/**
 * Read the persisted token or generate + persist a new one.
 */
export declare function ensureToken(projectRoot: string): string;
/**
 * Express middleware: validates Authorization: Bearer <token> header.
 */
export declare function bearerAuth(token: string): (req: Request, res: Response, next: NextFunction) => void;
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