/**
 * Express 5 / `router@^2.x` discards the original mount-path string at Layer
 * construction time. To recover it, we patch `Router.prototype.use` and
 * `.route` to record the path argument on the resulting Layer(s) before
 * returning to the user. The patch is idempotent and a no-op for consumers
 * who don't have the `router` package installed (Express 4 only).
 *
 * Side-effected by `src/index.ts` import so consumers don't need a setup
 * call. Patches `Router.prototype` once; subsequent imports are no-ops.
 */
export interface CapturedPath {
    /**
     * The original path argument passed to `router.use(path, ...)` or
     * `router.route(path)`. Stored on each newly-created Layer as a hidden
     * symbol property so the v5 walker can reconstruct full paths.
     */
    path: string | RegExp | (string | RegExp)[];
}
/**
 * Hidden property attached to v5 Layer instances by the patch. The v5 parser
 * reads this to recover mount paths. The symbol form prevents collisions
 * with any Layer field upstream might add.
 */
export declare const ORIGINAL_PATH: unique symbol;
/**
 * Idempotent. Returns true if patching took effect (or was already in place);
 * false if the `router` package isn't installed (Express 4 only deployment).
 *
 * Exported for tests and for the documented escape hatch
 * `EXPRESS_ROUTE_PARSER_NO_AUTO_INSTRUMENT=1`.
 */
export declare const instrumentExpress5Router: () => boolean;