snip-file

You want to make a quick skeleton for a VS Code snippet from a file, then all ya gotta do is:

npx snip-file --prefix example --description "Snippet description" <path-to-file>

You'll then get an output like:

{
    "prefix": "example",
    "description": "Snippet description",
    "body": [
        "This would be filled with the contents of your file"
    ]
}

Note: Providing the --prefix or --description is absolutely optional. You can provide one or the other, or none. In the case that you don't provide one, its value will then default to the empty string.