Currently ICML output does not create first paragraph style. Often first line of new section needs to be styled differently than following paragraphs (e.g. drop caps, no indentation). Content can be unlinked and styles added manually to desired paragraphs in Indesign but if the original text changes this has to be done again and again.

It would be preferable to have "first paragraph" style in the ICML output. I tried to search for ways to add this myself but I failed (as I have very limited grasp of Lua or Pandoc in general). This issue has been mentioned also in #3457.

Is there some common way to do this with a Lua filter?