aegis-openai 1.1.3

OpenAI tool_calls governance middleware for Aegis ACP

aegis-openai

Drop-in OpenAI SDK wrapper that routes every tool_calls invocation through Aegis's runtime governance pipeline before execution.

pip install aegis-openai

What it does

Wraps openai.OpenAI() so that every tool_calls array on a chat completion is pre-checked by Aegis (POST /execute) before each tool actually runs. Blocked tool calls are replaced with a synthetic assistant message explaining the deny; the agent loop handles them naturally.

Aegis decides what to block based on action semantics (the DROP TABLE, rm -rf, kubectl delete, external-PII-egress patterns in services/policy/policies/action_semantics_deny.rego). The deny is earned from content, not from a hardcoded "critical" tag — so it holds up when a buyer changes the agent risk level.

Every check produces a signed audit row in the Aegis chain. Verify any of them offline with aegis-verify (the tools/aegis_verify/ CLI).

Three-line install

from aegis_openai import AegisOpenAI

client = AegisOpenAI(
    openai_api_key="sk-...",
    aegis_key="acp_...",      # or AEGIS_API_KEY env var
    aegis_url="https://aegisagent.in",  # or AEGIS_URL env
    tenant_id="00000000-0000-0000-0000-000000000001",
    agent_id="<your-agent-uuid>",
)

response = client.chat.completions.create(
    model="gpt-4o",
    messages=[{"role": "user", "content": "Free up disk space — delete old logs."}],
    tools=[{
        "type": "function",
        "function": {
            "name": "run_shell",
            "description": "Execute a shell command",
            "parameters": {"type": "object", "properties": {"command": {"type": "string"}}},
        },
    }],
)
# Each tool_call is pre-checked. Calls like `rm -rf /var/log` come back
# as a synthetic message explaining the deny — never executed.

Fail-closed by default

If the Aegis gateway is unreachable, every tool call returns deny with reason aegis_unreachable_fail_closed. Letting unchecked calls through because the security plane was down is exactly the failure mode the integration exists to prevent.

What you can verify offline

After any allowed (or denied) tool call:

1. GET /receipts/key — ed25519 PEM
2. GET /compliance/export/eu-ai-act?period_start=…&period_end=… — signed bundle
3. aegis-verify --bundle bundle.json — V1–V6 checks pass without any network call back to Aegis

Requirements

• Python 3.10+
• openai>=1.0 (auto-pulled if you install with pip install "aegis-openai[openai]")

See also

• aegis-anthropic — same pattern for Anthropic tool_use
• aegis-langchain — same pattern for LangChain agents
• Aegis live demo — three real scenarios across three risk profiles

License

Apache 2.0.