Module embedder_registry 

Embedder registry for model selection (bd-2mbe).

This module provides a registry of available embedding backends that allows:

• Listing available embedders with metadata
• Selecting embedder by name from CLI/config
• Validating model availability before use
• Providing a sensible default model

Note: The core types (RegisteredEmbedder, EmbedderRegistry) are structurally identical to those in frankensearch_embed::model_registry. They are kept locally for now due to build-system sync constraints (rch does not sync sibling path dependencies). See frankensearch-embed for the canonical definitions, which additionally include reranker support, two additional Potion embedders, and richer directory-resolution helpers.

Supported Embedders

Name	ID	Dimension	Type	Notes
minilm	minilm-384	384	ML	Default semantic embedder
hash	fnv1a-384	384	Hash	Always available fallback

Example

use crate::search::embedder_registry::{EmbedderRegistry, get_embedder};

let registry = EmbedderRegistry::new(&data_dir);

// List available embedders
for info in registry.available() {
    println!("{}: {} ({})", info.name, info.id, info.dimension);
}

// Get embedder by name
let embedder = get_embedder(&data_dir, Some("minilm"))?;

Structs

EmbedderRegistry

Embedder registry with data directory context.

RegisteredEmbedder

Information about a registered embedder.

Constants

BAKEOFF_ELIGIBILITY_CUTOFF

Eligibility cutoff for bake-off (models must be released on/after this date).

DEFAULT_EMBEDDER

Default embedder name when none specified.

HASH_EMBEDDER

Hash embedder name (always available).

REQUIRED_ONNX_FILES

Files required for any ONNX-based embedder.

Statics

EMBEDDERS

Static registry of all supported embedders.

Functions

get_embedder

Load an embedder by name (or default if None).

get_embedder_info

Get embedder info for display/logging.