Struct AdaptiveConformal 

pub struct AdaptiveConformal { /* private fields */ }

Online / adaptive conformal — Gibbs & Candès (2021), Adaptive Conformal Inference Under Distribution Shift. calibrate fixes a threshold ONCE and assumes exchangeability; under real drift (models change, prompts change, the gate’s error rate moves) the realized served-failure wanders off target. AdaptiveConformal instead tracks the serving threshold online from realized outcomes, so the long-run served-failure rate stays at alpha as the workload shifts.

This is the “gate that recalibrates itself from live feedback”: every deferred verdict nudges the threshold, so it never drifts too loose (serving junk) or too strict (escalating needlessly). Feed it the deferred-feedback stream and read AdaptiveConformal::threshold on the router hot path.

Implementations

impl AdaptiveConformal

pub fn new(alpha: f64, gamma: f64, init_threshold: f64) -> Self

alpha = target served-failure rate; gamma = step size (e.g. 0.01–0.05, larger tracks shift faster but noisier); init_threshold = starting λ (e.g. a calibrate result).

pub fn should_serve(&self, score: f64) -> bool

Serve iff score ≥ the current threshold.

pub fn threshold(&self) -> f64

The current serving threshold λ_t.

pub fn observe_served(&mut self, was_correct: bool)

Observe a served item’s realized correctness (from deferred feedback) and adapt λ. The ACI update raises λ when served errors exceed alpha (serve more conservatively) and lowers it when they’re below (serve more), so realized served-failure converges to alpha.

pub fn realized_served_failure(&self) -> f64

Realized served-failure rate so far (running diagnostic).

pub fn served(&self) -> u64

Number of served items observed so far.

Trait Implementations

impl Clone for AdaptiveConformal

fn clone(&self) -> AdaptiveConformal

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AdaptiveConformal

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

Formats the value using the given formatter.