So reading the docs on --metadata-file I assumed I could use this instead, 
so I make a new yaml file saved to the data dir metadata folder and call it 
from the defaults file. In the metadata.yaml file I put:

*header-includes: |*
* `#set heading(numbering: "(I)")`{=typst}*
    
and this gives me *#set heading(numbering: "(I)")* -- good, pandoc parsed 
the markdown and didn't escape the # .However I then tried a block:

*header-includes: |*
* ```{=typst}*
* #set heading(numbering: "(I)")*
* ```*


And the output is *`{=typst} #set heading(numbering: "(I)")` *— hm not so 
clear why the block generates this unesscaped but transformed markdown?

Ian
On Tuesday, 10 October 2023 at 20:44:41 UTC+8 iandol wrote:

> Thanks John, so there is no way to stop the escaping as even if I remove 
> the raw attribute, the # of the typst set command also gets escaped 
> stopping it from working...?
>
> Best, Ian
>
> On Tuesday, 10 October 2023 at 12:03:44 UTC+8 John MacFarlane wrote:
>
>> metadata in a defaults file is parsed as plain text not markdown 
>> (remember, default files are basically equivalent to specifying something 
>> on the command line, and this is how --metadata behaves). So the raw 
>> attribute won't be recognized.
>>
>>
>> > On Oct 9, 2023, at 6:06 PM, iandol <ian...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> > 
>> > I want to use header-includes: in a defaults file, so assuming it is 
>> metadata (i.e. converted to variables for the template) do this in my 
>> typst.yaml defaults file:
>> > 
>> > metadata:
>> > header-includes: |
>> > ```{=typst}
>> > #set heading(numbering: "(I)")
>> > ```
>> > mainfont: "Alegreya Sans"
>> > 
>> > But the output is escaped. The same header-includes text works when 
>> added to the document metadata header directly. I'm probably doing 
>> something stupid but didn't yet grok what that is... Any help appreciated!
>> > 
>> > Best, Ian
>> > 
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