Plugin Devtool Prompt for ChatGPT explained

I am using the ChatGPT devtool to check the “Prompt for ChatGPT” for the starter Todo List plugin GitHub - openai/plugins-quickstart: Get a ChatGPT plugin up and running in under 5 minutes!. I am seeing the following:

I don’t understand the coding syntax. For example:

// Get the list of todos
type getTodos = (_: {
// The name of the user.
username: string,
}) => any;

I have never seen for example (_: { //something }) => any;

What is this prompt?

I think your yaml description gets compiled into this intermediate representation.

Interestingly, even though the yaml describes some of the IO format, that transpiled output seems to use “any” a lot for things I’d expect to be labelled as structured data.

It is not a prompt, it is TypeScript.

My understanding is that it is the API used by the web page to communicate with the ChatGPT plugin.

The TypeScript is not something created by the developer of the ChatGPT plugin but at some point in the validation process and allows the developer of the ChatGPT plugin to verify what is being passed to the ChatGPT plugin. If you look closely you will also notice that some of the names and comments in the TypeScript come directly from the OpenAPI specification.