ax-engine 5.1.2

Preview Python bindings for AX Engine v5

ax-engine-py

Preview Python bindings for AX Engine v4.

This crate exposes the ax_engine._ax_engine extension module and stays aligned with the v4 SDK contract rather than inventing a separate Python-only runtime surface.

Current preview scope:

• SDK-backed Session
• fail-closed host validation (requires M2 Max or newer, macOS 14+, 32 GB RAM)
• runtime metadata reporting
• mlx=True selects the repo-owned MLX runtime
• support_tier="mlx_lm_delegated" selects explicit upstream mlx-lm text compatibility through mlx_lm_server_url
• non-MLX inference routes to llama.cpp
• text/chat convenience helpers over the same SDK-backed request contract
• stepwise request control via submit(...), step(), snapshot(...), and cancel(...)
• SDK-backed in-process stream_generate(...) lifecycle events emitted through a native incremental iterator
• mlx-lm compatibility via mlx_lm_server_url
• llama.cpp compatibility via llama_model_path, llama_cli_path, or llama_server_url
• native_mode=True is retired and returns an error

Current non-goals:

• text tokenization and decoding
• automatic model-aware chat templating
• transport-level remote streaming
• broad compatibility lifecycle parity across multiple delegated adapters

For Phase 1, stepwise request-control methods support MLX preview plus the server-backed llama.cpp compatibility path. The mlx_lm_delegated path is text-only blocking generation through mlx_lm.server; token prompts, streaming, and lifecycle calls fail closed. One llama.cpp compatibility session can now hold multiple active delegated requests while step() aggregates progress across them.

Build from the repository root with maturin:

maturin develop

For a repo-owned integration smoke check that bootstraps a temporary virtual environment, installs maturin, builds the extension, runs the checked-in Python examples, and then runs both the installed-package preview tests and the wrapper tests, use:

bash scripts/check-python-preview.sh

To verify the extension-module packaging path without installing it, build from the repository root with:

cargo build -p ax-engine-py --no-default-features --features python-extension