Struct PassPredictor 

pub struct PassPredictor { /* private fields */ }

An online logistic-regression predictor of gate-pass probability.

Cheap to update (one SGD step per observed attempt) and cheap to query (one dot product). Wrap in Arc<Mutex<_>> for the proxy, like the bandit — per-process, in-memory; the durable state is the receipts it warm-starts from.

Implementations

impl PassPredictor

pub fn new(lr: f64, l2: f64) -> Self

Create a predictor with learning rate lr (0, 1] and L2 penalty l2 (>= 0), zero-init.

pub fn predict(&self, features: &Features, rung: u32) -> f64

Predicted P(gate-pass) for (features, rung), in (0, 1).

pub fn update(&mut self, features: &Features, rung: u32, passed: bool)

One SGD step against the observed outcome passed for (features, rung).

Gradient of the logistic loss: (p - y)·x, plus L2 shrinkage on every weight except the bias (regularizing the intercept would bias the base rate).

Trait Implementations

impl Clone for PassPredictor

fn clone(&self) -> PassPredictor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PassPredictor

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

Formats the value using the given formatter.