Module search 

Search layer facade.

This module provides the search infrastructure for cass, including:

• query: Query parsing, execution, and caching for Tantivy-based full-text search.
• tantivy: Tantivy index creation, schema management, and document indexing.
• embedder: Embedder trait for semantic search (hash and ML implementations).
• embedder_registry: Embedder registry for model selection (bd-2mbe).
• hash_embedder: FNV-1a feature hashing embedder (deterministic fallback).
• fastembed_embedder: FastEmbed-backed ML embedder (MiniLM).
• reranker: Reranker trait for cross-encoder reranking of search results.
• reranker_registry: Reranker registry for model selection with bake-off support.
• fastembed_reranker: FastEmbed-backed cross-encoder reranker (ms-marco-MiniLM-L-6-v2).
• daemon_client: Daemon client wrappers for warm embedder/reranker (bd-1lps).
• model_manager: Semantic model detection + context wiring (no downloads).
• model_download: Model download system with consent, verification, and atomic install.
• policy: Semantic policy contract: model defaults, tiers, budgets, invalidation.
• semantic_manifest: Durable semantic asset manifests, backlog ledger, and checkpoints.
• canonicalize: Text preprocessing for consistent embedding input.
• ann_index: HNSW-based approximate nearest neighbor index (Opt 9).
• two_tier_search: Two-tier progressive search with fast/quality embeddings (bd-3dcw).
• pack_planner: Deterministic answer-pack evidence selection core.

Modules

ann_index

Approximate nearest-neighbor (ANN) reporting types.

asset_state

Shared search asset state evaluation for status, health, and fail-open search planning.

canonicalize

Text canonicalization for consistent embedding input.

daemon_client

Daemon client integration re-exports.

embedder

Embedder trait and types for semantic search.

embedder_registry

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

fastembed_embedder

FastEmbed-based ML embedders.

fastembed_reranker

FastEmbed-based cross-encoder reranker (ms-marco-MiniLM-L-6-v2).

hash_embedder

FNV-1a feature hashing embedder.

model_download

Model download and management system.

model_manager

Semantic model management (local-only detection).

pack_planner

Deterministic answer-pack evidence selection.

policy

Semantic policy contract for cass hybrid search.

query

reranker

Reranker trait and types for cross-encoder reranking.

reranker_registry

Reranker registry for model selection.

runtime_optimizations

Runtime-toggleable performance optimizations.

semantic_manifest

Durable semantic asset manifest, backlog ledger, and resumable checkpoints.

tantivy

two_tier_search

Two-tier progressive search for session search (bd-3dcw, bd-2fu7e).

vector_index

Vector index facade for cass.