> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Rule

## Fields

| Field      | Type                                                                                                            | Required             | Description |
| ---------- | --------------------------------------------------------------------------------------------------------------- | -------------------- | ----------- |
| `field`    | [components.FieldT](../components/fieldt.mdx)                                                                   | :heavy\_check\_mark: | N/A         |
| `operator` | [components.Operator](../components/operator.mdx)                                                               | :heavy\_check\_mark: | N/A         |
| `value`    | [Optional\[components.ObservabilityFilterRuleGroupValue\]](../components/observabilityfilterrulegroupvalue.mdx) | :heavy\_minus\_sign: | N/A         |