I want to have a global type in my simple typescript project. The program just run a simple calculation in src/index.ts and have other typescript helpers in src/utils. The goal is to declare a global type so that the type is available in any source files.

I made a global.d.ts file in the project root.

import { Readable } from "stream";

declare global {
    type MyFile = {
        readonly name: string;
        readonly stream: Readable;
    }
}

But MyFile is not recognized in src files.

How can I fix it?