I'm currently looking into using d.ts files as a way to declare some types using imports from libraries without risking to import the libraries themselves.

Example:

// my.d.ts
import eslint from "eslint"

export type ESLint = typeof esIint;

Did you catch that? TypeScript didn't. The .d.ts file above "passes" tsc validation but typeof eslint is spelled as typeof ESIINT.

Use skipLibCheck: false and it works: