Struct G 

pub struct G;

The G namespace — static factory methods for guards.

Implementations

impl G

pub fn length(min: usize, max: usize) -> GGuard

Length guard — output must be within bounds.

pub fn regex(pattern: &str) -> GGuard

Regex guard — output must match (or not match) a pattern.

pub fn budget(max_tokens: usize) -> GGuard

Budget guard — output must not exceed a token estimate.

pub fn json() -> GGuard

JSON guard — output must be valid JSON.

pub fn max_turns(n: u32) -> GGuard

Max turns guard — placeholder for turn limit enforcement.

pub fn pii() -> GGuard

PII guard — checks for common PII patterns (email, phone).

pub fn topic(deny: &[&str]) -> GGuard

Topic restriction guard — output must not mention denied topics.

pub fn custom( f: impl Fn(&str) -> Result<(), String> + Send + Sync + 'static, ) -> GGuard

Custom guard from a validation function.

pub fn output( f: impl Fn(&str) -> Result<(), String> + Send + Sync + 'static, ) -> GGuard

Output guard — validates model output content via a predicate function.

pub fn input( f: impl Fn(&str) -> Result<(), String> + Send + Sync + 'static, ) -> GGuard

Input guard — validates user input content via a predicate function.

pub fn rate_limit(max_per_minute: u32) -> GGuard

Rate limiting guard — enforces a maximum number of checks per minute.

pub fn toxicity() -> GGuard

Toxicity detection guard — placeholder for toxicity classification.

pub fn grounded() -> GGuard

Grounding check guard — placeholder for grounding verification.

pub fn hallucination() -> GGuard

Hallucination detection guard — placeholder for hallucination detection.

pub fn when( predicate: impl Fn(&str) -> bool + Send + Sync + 'static, inner: GGuard, ) -> GGuard

Conditional guard — only applies inner when predicate returns true.

pub fn llm_judge(prompt: &str) -> GGuard

LLM-as-judge content guard — stores a prompt for later LLM evaluation.

pub fn custom_judge( name: &str, f: impl Fn(&str) -> Result<(), String> + Send + Sync + 'static, ) -> GGuard

Named custom judge function guard.