Struct PolicyKernel 

pub struct PolicyKernel {
    pub id: String,
    pub knobs: PolicyKnobs,
    pub holdout_scores: HashMap<DomainId, f32>,
    pub total_cost: f32,
    pub cycles: u64,
    pub generation: u32,
    pub parent_id: Option<String>,
    pub replay_verified: bool,
}

A PolicyKernel is a versioned policy configuration with performance history.

Fields

id: String

Unique identifier.

knobs: PolicyKnobs

Configuration knobs.

holdout_scores: HashMap<DomainId, f32>

Performance on holdout tasks (domain_id -> score).

total_cost: f32

Total cost incurred.

cycles: u64

Number of evaluation cycles.

generation: u32

Generation (0 = initial, increments on mutation).

parent_id: Option<String>

Parent kernel ID (for lineage tracking).

replay_verified: bool

Whether this kernel has been verified via replay.

Implementations

impl PolicyKernel

pub fn new(id: String) -> Self

Create a new kernel with default knobs.

pub fn mutate(&self, child_id: String, rng: &mut impl Rng) -> Self

Create a mutated child kernel.

pub fn record_score(&mut self, domain_id: DomainId, score: f32, cost: f32)

Record a holdout score for a domain.

pub fn fitness(&self) -> f32

Fitness: average holdout score across all evaluated domains.

pub fn cost_adjusted_fitness(&self) -> f32

Cost-adjusted fitness: penalizes expensive kernels.

Trait Implementations

impl Clone for PolicyKernel

fn clone(&self) -> PolicyKernel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PolicyKernel

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for PolicyKernel

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for PolicyKernel

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.