export interface TransformResult {
    code: string;
    isTransformed: boolean;
}
/**
 * Rewrite relative `.mjs` require paths to `.js` in CJS output
 *
 * When esbuild transforms ESM to CJS, it converts `import './foo.mjs'` to `require('./foo.mjs')`.
 * Since the packer renames `.mjs` files to `.js` in the snapshot, the require paths must be
 * updated to match. This handles the rewriting at build time.
 *
 * @param code - The CJS code after esbuild transformation
 * @returns Code with relative .mjs require paths rewritten to .js
 */
export declare function rewriteMjsRequirePaths(code: string): string;
/**
 * Transform ESM code to CommonJS using esbuild
 * This allows ESM modules to be compiled to bytecode via vm.Script
 * Uses Babel parser for detecting unsupported ESM features, then esbuild for fast transformation
 *
 * @param code - The ESM source code to transform
 * @param filename - The filename for error reporting
 * @returns Object with transformed code and success flag
 */
export declare function transformESMtoCJS(code: string, filename: string): TransformResult;
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