> ## Documentation Index
> Fetch the complete documentation index at: https://praison.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Policy Engine • Rust AI Agent SDK
> PolicyEngine: Engine for evaluating policies.
# PolicyEngine
> Defined in the [**policy**](../modules/policy) module.
Rust AI Agent SDK
Engine for evaluating policies.
## Fields
| Name | Type | Description |
| --------- | ----------------------- | ----------------------------- |
| `rules` | `Vec<PolicyRule>` | Rules |
| `enabled` | `bool` | Whether the engine is enabled |
## Methods
### `new`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn new() -> Self
```
Create a new engine.
### `enable`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn enable(&mut self) -> ()
```
Enable the engine.
### `disable`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn disable(&mut self) -> ()
```
Disable the engine.
### `add_rule`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn add_rule(&mut self, rule: PolicyRule) -> ()
```
Add a rule.
**Parameters:**
| Name | Type |
| ------ | ------------ |
| `rule` | `PolicyRule` |
### `remove_rule`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn remove_rule(&mut self, name: &str) -> Option
```
Remove a rule by name.
**Parameters:**
| Name | Type |
| ------ | ------ |
| `name` | `&str` |
### `get_rule`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn get_rule(&self, name: &str) -> Option<&PolicyRule>
```
Get a rule by name.
**Parameters:**
| Name | Type |
| ------ | ------ |
| `name` | `&str` |
### `get_rule_mut`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn get_rule_mut(&mut self, name: &str) -> Option<&mut PolicyRule>
```
Get mutable rule by name.
**Parameters:**
| Name | Type |
| ------ | ------ |
| `name` | `&str` |
### `list_rules`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn list_rules(&self) -> Vec<&PolicyRule>
```
List all rules.
### `check`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn check(&self, content: &str) -> PolicyResult
```
Check content against all rules.
**Parameters:**
| Name | Type |
| --------- | ------ |
| `content` | `&str` |
### `check_and_redact`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn check_and_redact(&self, content: &str) -> (PolicyResult, String)
```
Check and redact content.
**Parameters:**
| Name | Type |
| --------- | ------ |
| `content` | `&str` |
### `rule_count`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn rule_count(&self) -> usize
```
Get rule count.
### `clear`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn clear(&mut self) -> ()
```
Clear all rules.
## Source
`praisonai/src/policy/mod.rs` at line 278
***
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