argus-shield 0.2.0

ARGUS Python SDK - Framework-agnostic AI agent guardrails and safety tool

ARGUS Python SDK

The official Python SDK for ARGUS — the Agent Runtime Guardrail & Unauthorized-action Stopper.

Securing what AI agents do — not just what they hear.

Installation

You can install the SDK via pip:

pip install argus-sdk

Or using uv:

uv add argus-sdk

Quick Start

1. Set your Environment Variables

export ARGUS_API_KEY="your-api-key"
export ARGUS_BASE_URL="http://localhost:8000"

2. Protect Your Tools

Wrap your critical agent tools with the @argus.protect decorator.

import argus

@argus.protect(action_type="send_email", target_type="email")
def send_email(to_address: str, subject: str, body: str):
    # This function will ONLY execute if ARGUS approves the action
    print(f"Sending email to {to_address}...")
    return True

3. Run the Agent within a Session

When a user submits a prompt, wrap the execution in an argus.Session. This automatically extracts the user's intent and establishes a temporary authorization boundary.

import argus
from argus import ArgusQuarantineException

prompt = "Send the Q3 report to [e-mail]"

# 1. Extract Intent and start session
with argus.Session(user_prompt=prompt):
    try:
        # Agent decides to execute the tool
        send_email(to_address="[e-mail]", subject="Q3 Report", body="Attached.")
        print("Success!")
        
        # If the agent goes rogue and tries to email someone else:
        send_email(to_address="[e-mail]", subject="Q3 Report", body="Attached.")
        
    except ArgusQuarantineException as e:
        print(f"Agent was stopped! Reason: {e.explanation}")

Integrations

LangChain

ARGUS provides native wrappers for LangChain tools.

from argus.integrations.langchain import wrap_langchain_tool
from langchain_core.tools import tool

@tool
def read_patient_record(patient_id: str) -> str:
    """Reads a patient record."""
    return "Patient Data"

# Wrap the tool
protected_tool = wrap_langchain_tool(
    tool=read_patient_record,
    action_type="read_patient_record",
    target_type="patient_record"
)

# Use it within an argus.Session normally!