This is a Panflute issue, where they're checking for valid formats for RawInlines, but Pandoc is emitting a format that it's not expecting.
Specifically, Panflute is not expecting to see a typst raw block. I believe any RawBlock format string is valid, and that Panflute should not be checking for a set of strings.
Is that possible - to do a more general check that will allow through such valid-but-as-yet-unknown-to-Panflute types?
(With pre-emptive apologies for the possibility that I have misunderstood the issue).
Thanks for Panflute - as ever - we are using it productively in with our book project.
However, we've run into a problem that the Quarto team think is a bug in Panflute:
https://github.com/quarto-dev/quarto-cli/issues/7215#issuecomment-1759696076
To quote from that description:
Is that possible - to do a more general check that will allow through such valid-but-as-yet-unknown-to-Panflute types?
(With pre-emptive apologies for the possibility that I have misunderstood the issue).