> For the complete documentation index, see [llms.txt](https://docs.vale.sh/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vale.sh/topics/filters.md).

# Filters

Learn about Vale's rule filtering system.

The `--filter` CLI option allows you to report an arbitrary subset of your `.vale.ini` configuration.

![Filters](/files/a0b43ee1ce5d8531993ffa0c829f812015444f2d)

A filter is an [expression](https://expr-lang.org/docs/language-definition) targeting one of the following keys defined in the rule definition: `.Name`, `.Level`, `.Scope`, `.Message`, `.Description`, `.Extends`, or `.Link`.

## Saving filters

You can save a filter for reuse by storing it in `<StylesPath>/config/filters`. Then, you can reference it by name when using the `--filter` option:

```bash
$ vale --filter=headings.expr docs/
```

Where `headings.expr` is a file containing the filter expression, such as:

```tengo
"heading" in .Scope
```

## Examples

* Filter by `.Level` and `.Name`:

```tengo
.Level in ["error", "suggestion"] and .Name != "demo.Cap"
```

* Filter by `.Extends`:

```tengo
.Extends=="existence"
```

* Only run a specific rule:

```tengo
.Name=="demo.Cap"
```

See the [documentation](https://expr-lang.org/docs/language-definition#operators) for a list of all supported operators.

[Actions](/topics/actions.md) [Templates](/topics/templates.md)


---

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