Checks that the frontmatter in your files is valid
| Flag | Default | Description |
|---|---|---|
| delimiters | [] | Custom delimiters (if other than ---, +++ and ;;;)
|
| forbidden | [] | Forbidden keys |
| optional | [] | Optional keys (only for --strict)
|
| required | [] | Required keys |
| sorted | false | Keys need to be in alphabetical order |
| strict | false | Strict (keys must be in --required or --optional)
|