Struct Params 

pub struct Params {
    pub prompt: String,
    pub primary: Option<ModelSpec>,
    pub fallback: Vec<ModelSpec>,
    pub fusion: Vec<ModelSpec>,
    pub consent_cross_tier: bool,
}

The request params a middleware may rewrite before the model call. Kept minimal and provider-agnostic for the core: the prompt text plus the routing shape a privacy-tier policy inspects. A real deployment threads richer params; the shape is what matters for the two-tier design.

The routing fields describe what a router may do with the request, not what it has done: primary is the model the request targets, fallback the ordered candidates a failover may swap to, and fusion the set a response-fusion may fan out across. The TierPolicy middleware reads these — it does not own the router — to refuse a confidentiality downgrade before any candidate runs.

Fields

prompt: String

The prompt text the input scanners run over.

primary: Option<ModelSpec>

The model the request primarily targets, when known. None leaves tier-policy a pass-through (the prompt-only core path).

fallback: Vec<ModelSpec>

Ordered failover candidates the router may swap to for primary.

fusion: Vec<ModelSpec>

Candidates a response-fusion may fan the request out across.

consent_cross_tier: bool

The caller explicitly accepted routing a Confidential request to a Frontier model (a privacy downgrade). Defaults to false: fail-closed.

Implementations

impl Params

pub fn new(prompt: impl Into<String>) -> Self

Construct params from a prompt, with no routing candidates and no cross-tier consent (fail-closed). Use the builder setters to add the model targets a TierPolicy inspects.

pub fn with_primary(self, primary: ModelSpec) -> Self

Set the primary target model.

pub fn with_fallback(self, fallback: Vec<ModelSpec>) -> Self

Set the ordered failover candidates.

pub fn with_fusion(self, fusion: Vec<ModelSpec>) -> Self

Set the response-fusion candidate set.

pub fn with_cross_tier_consent(self, consent: bool) -> Self

Record the caller’s explicit consent to a cross-tier (Confidential → Frontier) downgrade.

Trait Implementations

impl Clone for Params

fn clone(&self) -> Params

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Params

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Params

fn default() -> Params

Returns the “default value” for a type.