how do i enable equation autonumbering in docx format in quarto. i found this old reference to apply a lua filter that should work, just not sure how i would do that in qmd
What did you try ? It seems to be working for me
Doc is here:
And I get this from
---
title: "Equation"
format: docx
---
Black-Scholes (@eq-black-scholes) is a mathematical model that seeks to explain the behavior of financial derivatives, most commonly options:
$$
\frac{\partial \mathrm C}{ \partial \mathrm t } + \frac{1}{2}\sigma^{2} \mathrm S^{2}
\frac{\partial^{2} \mathrm C}{\partial \mathrm C^2}
+ \mathrm r \mathrm S \frac{\partial \mathrm C}{\partial \mathrm S}\ =
\mathrm r \mathrm C
$$ {#eq-black-scholes}
---
title: "Untitled"
format: docx
---
## Quarto
Quarto enables you to weave together content and executable code into a finished document. To learn more about Quarto see <https://quarto.org>.
## Running Code
When you click the **Render** button a document will be generated that includes both content and the output of embedded code. You can embed code like this:
```{r}
1 + 1
You can add options to executable code like this
#| echo: false
2 * 2
The echo: false option disables the printing of code (only output is displayed).
(@eq:eqn1)
$$a^2 + b^2 = c^2$$ {#eq:eqn1}
this works:
(@eq-eqn1)
$$a^2 + b^2 = c^2$$ {#eq-eqn1}
this doesnt
(@eq:eqn1)
$$a^2 + b^2 = c^2$$ {#eq:eqn1}
back to the informative warning issue 
Glad you found the problem.
yes this type of things will be improved in the future. Possibly with linting awareness in code editor so that this could be catched right away.