Struct RetrievalPolicy 

pub struct RetrievalPolicy {
    pub low_budget_ratio: f32,
    pub mid_budget_ratio: f32,
}

Token-budget-aware tier selector for context assembly.

Maps a remaining_ratio (0.0 = budget exhausted, 1.0 = budget fully available) to the subset of CompressionLevels to include in the context recall step.

Examples

use zeph_memory::compression::{RetrievalPolicy, CompressionLevel};

let policy = RetrievalPolicy::default();
// Full budget → all three tiers.
let levels = policy.select(0.80);
assert!(levels.contains(&CompressionLevel::Episodic));
assert!(levels.contains(&CompressionLevel::Declarative));

// Low budget → episodic only.
let levels = policy.select(0.10);
assert_eq!(levels, &[CompressionLevel::Episodic]);

Fields

low_budget_ratio: f32

Below this ratio only Episodic recall is attempted. Default: 0.20.

mid_budget_ratio: f32

Below this ratio Episodic + Procedural recall is attempted. Default: 0.50.

Implementations

impl RetrievalPolicy

pub fn select(&self, remaining_ratio: f32) -> &'static [CompressionLevel]

Select which compression levels should be included for remaining_ratio.

remaining_ratio	Levels returned
< low_budget_ratio	[Episodic]
< mid_budget_ratio	[Episodic, Procedural]
≥ mid_budget_ratio	[Episodic, Procedural, Declarative]

Trait Implementations

impl Clone for RetrievalPolicy

fn clone(&self) -> RetrievalPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RetrievalPolicy

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

Formats the value using the given formatter.

impl Default for RetrievalPolicy

fn default() -> Self

Returns the “default value” for a type.

impl Copy for RetrievalPolicy