Module delta 

Delta compression, delta chains, and reconstruction policies (ADR-021).

Sparse delta encoding for incremental tensor updates, bounded-depth delta chain management with automatic compaction, and SVD-based low-rank factor reconstruction. All structures are WASM-safe (no f64 in hot paths).

Structs

DeltaChain

A chain of deltas applied to a base block. Invariant: deltas.len() <= max_chain_len.

DeltaHeader

Header for a delta record.

DeltaRecord

Complete delta record: header + sparse entries + scale.

FactorSet

Low-rank factor representation for reconstruction.

SparseEntry

A single sparse delta entry: index + quantized value.

Functions

apply_delta

Apply a delta to a base data vector in-place.

compute_delta

Compute a sparse delta between old and new data.

decode_delta

Decode a DeltaRecord from bytes.

encode_delta

Encode a DeltaRecord to bytes (little-endian, ADR-021 section 4.1).