Type Alias LlmConditionalFn 

pub type LlmConditionalFn = Arc<dyn Fn(&LlmRequest) -> Result<Option<String>> + Send + Sync>;

Decide whether an LLM call is allowed to continue.

The callback receives the current LlmRequest and can allow execution, reject it with a guardrail reason, or return an error.

This alias is Arc-backed so the runtime can clone conditional guardrails into an evaluation snapshot and invoke them after registry locks are released.

Parameters

• First argument: Current LlmRequest being evaluated.

Returns

A Result containing Ok(None) when execution is allowed or Ok(Some(reason)) when the guardrail rejects the call.

Errors

The callback can return any FlowError to abort guardrail evaluation.

Aliased Type

pub struct LlmConditionalFn { /* private fields */ }