Enum HookAction 

#[non_exhaustive]
pub enum HookAction {
    Continue,
    Terminate {
        reason: String,
    },
}

Decision returned from ChatMiddleware::on_run_started to optionally short-circuit a run before any provider call.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Continue

Default: let the run proceed.

Terminate

Abort the run before the first provider call. The engine surfaces the reason as crate::FinishReason::Aborted(reason) and still fires ChatMiddleware::on_run_finished.

Fields

reason: String

Human-readable reason; threaded through FinishReason::Aborted.