import { PluginSystemHelpers } from "../createPluginSystemHelpers.js";
import * as fs from "./lib/fsLimit.js";
type BufferEncoding = Extract<Parameters<typeof fs.readFile>[1], string>;
export type ReadProjectFileArgs = {
    filename: string;
    helpers: PluginSystemHelpers;
};
export declare function readProjectFile(args: ReadProjectFileArgs): Promise<Buffer>;
export declare function readProjectFile(args: ReadProjectFileArgs & {
    encoding: BufferEncoding;
}): Promise<string>;
export {};