acgs

ACGS — Constitutional AI Governance. Umbrella package for the open-core ACGS line.

Installing acgs gives you acgs-lite, the receipt-gated AI-governance library, re-exported as acgs.lite:

import acgs

print(acgs.__version__)
acgs.lite  # the acgs-lite library

What this is

• A thin meta-package: one import surface and a pinned dependency line for the open-source parts of the ACGS project.
• The underlying library provides a local receipt-gated governance kernel: policy evaluation, tamper-evident JSONL audit chains, opt-in Ed25519 signing, and integration adapter shapes for MCP / function-call / runtime hooks.

What this is not

ACGS is alpha software — a production-shaped foundation developed and tested locally. It is not compliance-certified, regulator-approved, or a claim of guaranteed safety. See the project repository for the current claim register and limitations.

Versioning and license history

• 4.0.0+ — clean umbrella over the open-core line, Apache-2.0. The legacy bundled core and research top-level packages from 3.x are no longer shipped.
• ≤ 3.0.2 — legacy bundle (acgs_lite, core, research), published under AGPL-3.0-or-later; those releases remain on PyPI under their original license.

Links

• Project monorepo: https://github.com/acgs-ai/ACGS
• Library: https://pypi.org/project/acgs-lite/
• Issues: https://github.com/acgs-ai/ACGS/issues