[wodenokoto]

> whereby all syntaxes can inject themselves into Markdown fenced code blocks etc?

Maybe I’m misunderstanding, but I think you can do that with multimarkdown rendering.

    # my code example
    ```python
    This = {“codeblock”: “is colored”}
    as = [“python”, “code”]
    ```

[indentit]

This is only possible for syntaxes which ship with ST. If you want to put a Markdown fenced code block for a third party syntax like Svelte, then it won't be highlighted as Svelte currently.