Module backends 

Entropy/compression backend implementations and backend discovery. Backend discovery helpers and canonical backend naming.

This module provides:

• canonical backend name resolution for CLI/Python inputs,
• feature-aware availability reporting,
• exported lists of enabled backend families.

Modules

calibration

Online probability calibration wrapper for rate predictors.

ctw

Context Tree Weighting (CTW) and Factorized Action-Conditional CTW (FAC-CTW).

llm_policy

Shared policy parser/compiler for online LLM backends.

mambazip

Mamba-1 based rate/compression backend.

match_model

Contiguous/sparse local match predictor primitives.

particle

Particle-latent rate backend. Particle-latent filter ensemble rate backend.

ppmd

Bounded-memory PPMD-style byte model.

rosaplus

ROSA: Rapid Online Suffix Automaton

rwkvzip

RWKV7-based rate/compression backend.

sparse_match

Sparse/gapped match predictor that wraps match_model.

text_context

Text/repeat context feature extraction for adaptive backends.

zpaq_rate

ZPAQ-backed sequential rate model.

Enums

BackendAvailability

Outcome of resolving a backend alias to a canonical backend name.

Constants

AVAILABLE_COMPRESSION_BACKENDS

Canonical names for available compression backends in this build.

AVAILABLE_RATE_BACKENDS

Canonical names for rate backends recognized by CLI/API alias resolution.

Functions

parse_rate_coder

Parse a generic entropy coder alias ("ac"/"rans").

parse_rwkv7_coder

Parse an RWKV entropy coder alias ("ac"/"rans").

resolve_compression_backend_name

Resolve a user-provided compression backend alias to a canonical backend name.

resolve_rate_backend_name

Resolve a user-provided rate backend alias to a canonical backend name.