Scrivener hangs when compiling for MultiMarkDown

[nontroppo]

Sounds like you have a working option , but for completeness I did make a Pandoc filter for indexes that is an alternative workflow:

Making an index?

I’ve created a Pandoc filter that basically does what @AmberV’s compile replacements do for ODT, but with the added flexibility of supporting Typst + ODT + DOCX + LaTeX. It depends on the same two styles AmberV specifies: Index Key and Index Term — these should get compiled to \index{ancestor!parent!keyword} and \indext{ancestor!parent!keyword} (you need to wire these up in your compile format); the ancestor and parent are optional. The difference between \index and \indext are based on whether …

This steps the filter entry one step back, the markdown still contains the \index{keyword} and the filter adds the correct low-level markup when generating the output. This makes the Scrivener compile format more generic and the markdown document more compatible, you can use the same compiled markdown for ODT/DOCX/Typst/LaTeX.