Enum EmbeddingBackend 

pub enum EmbeddingBackend {
    FastEmbed,
    Model2Vec,
    None,
}

The embedding backend selector ([local_ai.embedding] model = "...").

• FastEmbed (default): MiniLM transformer — best quality, but the cold backfill is CPU-bound (~10-100 chunks/sec), so impractical for very large repos.
• Model2Vec: static token-vector lookup + mean-pool — ~100-500× faster on CPU at some retrieval-quality cost (no context/word-order). The choice for huge repos that still want vectors.
• None: structural + BM25 only; no dense vectors. semantic_search degrades to BM25. The cheapest option for enormous codebases where any embedding backfill is too slow.

Variants

FastEmbed

Model2Vec

None

Implementations

impl EmbeddingBackend

pub fn as_str(self) -> &'static str

pub fn model_id(self) -> Option<&'static str>

The persisted embedding-model id this backend installs/activates, or None for the embeddings-off choice. Kept as a string so rag-rat-core::index::ai model ids stay the single source of truth without config depending on index.

Trait Implementations

impl Clone for EmbeddingBackend

fn clone(&self) -> EmbeddingBackend

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for EmbeddingBackend

impl Debug for EmbeddingBackend

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

Formats the value using the given formatter.

impl Default for EmbeddingBackend

fn default() -> EmbeddingBackend

Returns the “default value” for a type.

impl Eq for EmbeddingBackend

impl FromStr for EmbeddingBackend

type Err = ConfigError

The associated error which can be returned from parsing.

fn from_str(value: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl PartialEq for EmbeddingBackend

fn eq(&self, other: &EmbeddingBackend) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for EmbeddingBackend