Examples pf typst styling here:

https://typst.app/docs/tutorial/advanced-styling/

And his template here:

https://imaginarytext.ca/posts/2025/img/article.typ

I'll give an example.

I write Python, software engineering, and data science books in Jupyter. (Because I want both text and code). I've written my own toolchain (multiple times, don't ask, yes, I've tried the one you're thinking of and it didn't work for me).

I need to convert the notebooks into chapters in my books (PDF so I can print them). In the past, I used code to convert to LaTeX. (It was horrible).

Now, I use code to convert the Jupyter file to markdown, then (I use pandoc too) to typst. (It is 100x better than LaTeX).

(I also use pandoc to convert markdown to epub).

  #import "@preview/callisto:0.2.5"
  #callisto.render(nb: json("notebook.ipynb"))

The author explain this in more detail in the article; I also was initially confused. The key details come from their broken down pandoc command. Specifically, these two flags:

  --pdf-engine=typst
  -V template=article.typ

Despite the input content being a .md file, we see that the .md contents populate the .typ file. Pandoc then understands how to convert the populated .typ file into a .pdf. The author also notes in their hyperlinked .typ document where the body content is placed:

  // THIS IS THE ACTUAL BODY:

What is not clear to me is the actual mechanism that tells pandoc where to place the body contents in the template. I presume it's some "magic" from the pandoc docs. The pandoc templates documentation[1] does reveal to us that `-V` is setting a variable called `template`. I don't have pandoc locally, but from another post[2] from the same author and a chatgpt query, it seems that the `body` symbol in the template is the chosen substitution symbol.

[1]: https://pandoc.org/demo/example33/6-templates.html

[2]: https://imaginarytext.ca/posts/2024/pandoc-typst-tutorial/