This filter converts Pandoc slide shows to HedgeDoc slide shows:

• add meta information title, subtitle, author, date to title slide
• add horizontal rules before level 1 and 2 headings
• shorten horizontal rules to ---

quarto add sokotim/hedgedoc-slides

This will install the extension under the _extensions subdirectory. If you're using version control, you will want to check in this directory.

Add

filters:
    - hedgedoc-slides

to _quarto.yml or your YAML metadata header. Then convert your markdown file, e.g.

quarto render example.qmd -o hedgedoc-slides.md -t markdown

Here is the source code for a minimal example: example.qmd.