import type { NestMiddleware } from '@nestjs/common';
import type { Request, Response, NextFunction } from 'express';
import type { MastraModuleOptions } from '../mastra.module.js';
/**
 * Middleware that parses JSON request bodies.
 * Uses express.json() with size limits from configuration.
 *
 * This middleware is essential for JSON request bodies to work properly.
 * NestJS does not automatically parse JSON bodies unless body-parser is configured.
 */
export declare class JsonBodyMiddleware implements NestMiddleware {
    private readonly options;
    private readonly jsonParser;
    constructor(options: MastraModuleOptions);
    use(req: Request, res: Response, next: NextFunction): void;
}
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