NotebookLM launches feature to customize and guide audio overviews

Is there an open source tool that copies NotebookLM yet, or did anyone dig a bit into how the prompting is done to generate output in this dialogue format?

Check out this prompt: https://github.com/souzatharsis/podcastfy/blob/6ad5734c3ffb5...

Looks good, I wonder if F5 could replace 11labs?

Huh, that gives the LLM an example

    <Person1> "Welcome to Podcastfy! <break time="0.5s" /> Today, we're summarizing an interesting text about [topic from input text]. Let's dive in!"</Person1> 

And then tells the LLM not to do anything at all like that example

    Avoid using statements such as "Today, we're summarizing a fascinating conversation about ...". ]
    [PauseInsertion: Avoid using breaks (<break> tag) but if included they should not go over 0.1 seconds]

Is this an intentional technique in prompt construction to avoid the LLM over indexing on the example or something?