Struct SemanticConfig 

pub struct SemanticConfig {
    pub enabled: bool,
    pub recall_limit: usize,
    pub vector_weight: f64,
    pub keyword_weight: f64,
    pub temporal_decay_enabled: bool,
    pub temporal_decay_half_life_days: u32,
    pub mmr_enabled: bool,
    pub mmr_lambda: f32,
    pub importance_enabled: bool,
    pub importance_weight: f64,
    pub embedding_provider: Option<ProviderName>,
    pub embed_timeout_secs: u64,
}

Semantic (vector) memory retrieval configuration, nested under [memory.semantic] in TOML.

Controls how memories are searched and ranked, including temporal decay, MMR diversity re-ranking, and hybrid BM25+vector weighting.

Example (TOML)

[memory.semantic]
enabled = true
recall_limit = 5
vector_weight = 0.7
keyword_weight = 0.3
mmr_lambda = 0.7

Fields

enabled: bool

Enable vector-based semantic recall. Default: true.

recall_limit: usize

vector_weight: f64

keyword_weight: f64

temporal_decay_enabled: bool

temporal_decay_half_life_days: u32

mmr_enabled: bool

mmr_lambda: f32

importance_enabled: bool

importance_weight: f64

embedding_provider: Option<ProviderName>

Name of a [[llm.providers]] entry to use exclusively for embedding calls during memory write and backfill operations. A dedicated provider prevents embed_backfill from contending with the guardrail at the API server level (rate limits, Ollama single-model lock). Falls back to the main agent provider when None.

embed_timeout_secs: u64

Timeout in seconds applied to every embed() call inside zeph-memory.

Applies to all embedding call sites: admission control, quality gate, recall, summarization, graph retrieval, consolidation, and tree consolidation. Set to a higher value when using slow remote embedding providers. Default: 5.

Trait Implementations

impl Debug for SemanticConfig

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

Formats the value using the given formatter.

impl Default for SemanticConfig

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for SemanticConfig

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for SemanticConfig

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

where __S: Serializer,

Serialize this value into the given Serde serializer.