Context

As of v0.18 it seems the MyST substitution syntax has been changed and now substitutions must be of type (<class 'str'>, <class 'int'>, <class 'float'>)

Proposal

Would you consider adding nested items to that list?

For example, this no longer works as params is not of type str, int, float

myst:
  substitutions:
    params:
      vars:
        name: Ximena
        title: Smudge

I want to be able to access that variable like this: {{ params.vars.name }}

The reason for this is because that substitution is auto-generated from a dictionary:

{"params": {"vars": {"name": "Ximena", "title": "Smudge}}}

Tasks and updates

Other suggestions on how to get around this issue are welcome, I'll trouble shoot and poke around to see if there's a good resolution with the existing codebase.

Potentially related to #747