.d.ts files are produced by Typescript compiler automatically from .ts files (and can be written manually for .js files). ML signature files are much like .h fi

.d.ts files are produced by Typescript compiler automatically from .ts files (and can be written manually for .js files). ML signature files are much like .h files and I think for the same reason - to make compiler work easier. Edit: as this is LLM thread - ML is Meta Language as in OCaml and SML.