Rendering a quarto document with format HTML / article fails at the yaml validation stage, at least since last Sunday (everything was working until then).

Have you tightened these validation rules recently?

The error message is the following (see [there for details](https://github.com/computorg/template-computo-quarto/actions/runs/2178416467)):

```
ERROR: Project _quarto.yml validation failed.

In file _quarto.yml
(line 4, column 5 through line 32, column [25](https://github.com/computorg/template-computo-quarto/runs/6050879186?check_suite_focus=true#step:5:25)) Key html has value page-layout: article
    include-in-header: includes/pseudocode-header.html
...
    html-math-method: katex
    self-contained: true, which must be 'default'
 3:   html:
 4:     page-layout: article
        ~~~~~~~~~~~~~~~~~~~~
 5:     include-in-header: includes/pseudocode-header.html
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
...
31:     html-math-method: katex
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~
32:     self-contained: true
    ~~~~~~~~~~~~~~~~~~~~~~~~
33: crossref:
```

The configuration file is there:

[https://github.com/computorg/template-computo-quarto/blob/main/_quarto.yml](https://github.com/computorg/template-computo-quarto/blob/main/_quarto.yml)

I have tried to change or comment on various options without success. I suspect maybe a parsing problem in the yaml check.

Thank you for your help
cscheid
2022-04-18T09:04:57Z
jchiquet
bug yaml-validation
closed
YAML project validation fails with recent releases
https://github.com/quarto-dev/quarto-cli/issues/672