acgs 1.0.0a2

Thin public ACGS namespace package backed by acgs-lite

acgs

Framework-agnostic governance SDK for AI agents.

acgs is the stable public namespace over acgs-lite. It re-exports the core governance primitives and adds pluggable policy backends plus persistent audit stores without requiring an external policy server.

Installation

acgs supports Python 3.10+.

pip install acgs
pip install acgs[cedar]
pip install acgs[fastapi]
pip install acgs[anthropic]
pip install acgs[openai]
pip install acgs[langchain]

Quick Start

from acgs import Constitution, GovernanceEngine, Rule, Severity

constitution = Constitution.from_rules([
    Rule(
        id="NO-SELF-APPROVAL",
        text="Agents may not self-approve production changes",
        severity=Severity.HIGH,
        keywords=["self-approve"],
    ),
])

engine = GovernanceEngine(constitution, strict=False)
result = engine.validate("self-approve this deployment", agent_id="agent-7")

assert result.valid is False
assert result.violations[0].rule_id == "NO-SELF-APPROVAL"

Policy Backends

Heuristic Backend

from acgs import Constitution, GovernanceEngine
from acgs.policy import HeuristicBackend

constitution = Constitution.default()
engine = GovernanceEngine(constitution, strict=False)
backend = HeuristicBackend(engine)

decision = backend.evaluate(action="deploy to prod", agent_id="bot-1")
print(decision.allowed, decision.backend, decision.latency_ms)

Cedar Backend

from acgs.cedar import CedarBackend

backend = CedarBackend.from_policy_dir("./policies")
decision = backend.evaluate(
    action="read:patient-records",
    agent_id="clinical-bot",
    context={"role": "EXECUTIVE", "department": "cardiology"},
)

Audit Stores

SQLite Audit Store

from acgs.audit_sqlite import SQLiteAuditStore

store = SQLiteAuditStore(path="acgs_audit.db")
entries = store.list_entries(agent_id="bot-1", limit=100)
chain_ok = store.verify_chain()

In-Memory Audit Store

from acgs.audit_memory import InMemoryAuditStore

store = InMemoryAuditStore()
print(store.count())

What acgs Adds Over acgs-lite

Layer	Package	Role
Public API	acgs	Stable namespace, policy backends, audit stores
Engine	acgs-lite	Validation engine, MACI, integrations, CLI

Import from acgs when you want the stable public SDK. Import acgs-lite directly when you need package-specific integrations, middleware, or the CLI.

Key Features

• Stable governance primitives re-exported from acgs-lite.
• Pluggable PolicyBackend interface with built-in heuristic and Cedar backends.
• Persistent audit storage through in-memory and SQLite implementations.
• Fail-closed policy evaluation and tamper-evident audit-chain verification.

License

AGPL-3.0-or-later. Commercial licensing is available; contact [e-mail].

Links

• Homepage
• Documentation
• PyPI
• Repository
• Issues
• Changelog

Constitutional Hash: 608508a9bd224290