Module vector_quantization 

In-tree LogQuantized + unified distance kernels (WEFT-15 / 128 / 352 / 353).

Vendor independence (2026-07-31)

These features were originally gated on ruvnet/RuVector#352 (still unmerged / conflicting). WeftOS now ships first-party implementations so activation no longer waits on that PR:

• KG-011 LogQuantized — log-scaled int8 bins for skewed embeddings
• KG-012 Unified distance — single codepath for cosine / L2 / IP with optional power-of-two padding and unrolled scalar SIMD-friendly loops

Config types remain serializable; is_available() is true when enabled is set (implementation always present in this crate).

Structs

LogQuantizedConfig

Configuration for logarithmic quantization.

LogQuantizedVector

Log-scaled int8 quantized vector (in-tree; no ruvector-core).

SimdDistanceConfig

Configuration for the unified distance kernel.

Enums

SimdDistanceMetric

Distance metric for the unified kernel.

Functions

maybe_pad

Optionally pad with zeros to power-of-two length.

next_pow2

Next power of two ≥ n (n ≥ 1).

unified_distance

Unified distance: one codepath for cosine / L2 / IP with unrolled loops.