Architectural Design: Agent Safety Patterns

This document details the high-level architecture of the Agent Safety Patterns framework, a reference implementation for secure autonomous operations on Google Cloud.

Design Philosophy

The architecture is built on the principle of Defense-in-Depth for AI. We assume that any single agent can fail, hallucinate, or be compromised. Safety is achieved through collective agreement and deterministic boundaries.

Core Components

1. The Hardened OODA Loop

The system follows the standard Observe-Orient-Decide-Act (OODA) loop, with safety "gates" at each transition:

• Observe: Ingests telemetry and logs via Cloud Logging.
• Orient (Analyzer): Vertex AI (Gemini 1.5 Pro) performs root-cause analysis. Output is sanitized by Model Armor.
• Decide (Consensus): Independent agents sign the finding. A Consensus Guardian verifies the quorum and replay nonces.
• Act (Remediator): A Safety Gate validates the action against resource quotas before the final actuator triggers remediation.

2. Multi-Agent Consensus Model

We use a BFT-inspired (Byzantine Fault Tolerance) quorum model. In this implementation, a 2/3 majority of registered RSA public keys must sign an identical proposal hash. This prevents "Single Point of Hallucination" failures.

3. Verification & Attestation

Every decision cycle generates a Signed Audit Package. This package contains the original finding, the multi-agent signatures, and the safety gate results. It is written to Cloud Logging, providing a non-repudiable trail for human oversight.

Infrastructure Blueprint

The architecture is designed to run on a Hardened GKE Cluster: - VPC Isolation: Private nodes with no external IP addresses. - Workload Identity: Agents use least-privilege GCP Service Accounts. - Vertex AI Private Endpoint: (Optional) Secure, private communication with AI services.

Sequence Flow

sequenceDiagram
    participant CloudLogging as GCP Telemetry
    participant Analyzer as Agent Analyzer
    participant Armor as Model Armor
    participant Guardian as Consensus Guardian
    participant Gate as Safety Gate
    participant Actuator as Remediator

    CloudLogging->>Analyzer: Ingest Logs
    Analyzer->>Armor: Propose Finding
    Armor->>Analyzer: Sanitized Finding
    Analyzer->>Guardian: Signed Proposal
    Guardian->>Guardian: Verify Quorum & Nonce
    Guardian->>Gate: Approved Proposal
    Gate->>Gate: Validate Resource Quota
    Gate->>Actuator: Authorized Action
    Actuator->>CloudLogging: Log Outcome