Struct RecencyConfig 

pub struct RecencyConfig {
    pub lambda: f32,
}

Parameters for exponential time-decay of memory recency.

The decay formula is: recency_weight = exp(-lambda * days_since_access)

Common presets:

Half-life	lambda
1 day	0.693
1 week	0.099
1 month	0.023
3 months	0.0077

Fields

lambda: f32

Decay rate λ. Must be > 0. Typical range: 0.005–1.0.

Implementations

impl RecencyConfig

pub const WEEKLY_DECAY: Self

λ ≈ ln(2)/7 — half-life of 7 days. Good default for conversational agents.

pub const MONTHLY_DECAY: Self

λ ≈ ln(2)/30 — half-life of 30 days. Good for long-term knowledge bases.

pub const DAILY_DECAY: Self

λ ≈ ln(2)/1 — half-life of 1 day. Aggressive decay for short-term sessions.

pub fn new(lambda: f32) -> Self

Trait Implementations

impl Clone for RecencyConfig

fn clone(&self) -> RecencyConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for RecencyConfig

impl Debug for RecencyConfig

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

Formats the value using the given formatter.

impl Default for RecencyConfig

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for RecencyConfig

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for RecencyConfig

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

where __S: Serializer,

Serialize this value into the given Serde serializer.