OPA Governance
Relevant source files
The following files were used as context for generating this wiki page:
OPA Governance serves as the dedicated security and compliance layer within the Nexus Orchestrator. It integrates Open Policy Agent (OPA) with Zero Trust principles to provide robust security for non-human identities, specifically AI agents, as they interact with infrastructure. This system functions as the "Governance Layer," one of the four core pillars of the Nexus Autonomous Infrastructure Daemon.
Sources: README.md:12, README.md:19
Architectural Overview
The governance framework is designed to bridge the "infrastructure gap" by ensuring that every action taken by an AI agent is validated against a central policy engine. It operates alongside the Connectivity, Orchestration, and Context layers to provide a secure environment for autonomous operations.
Governance Components
The system relies on three primary components to enforce security:
- OPA Engine: Evaluates requests against Rego-based policies.
- Zero Trust Provider: Handles identity verification for agents.
- Agent Registry: Maintains state and trust levels for known entities.
The diagram above illustrates the validation flow where the Orchestration layer consults the OPA Governance module before executing tasks on infrastructure.
Sources: README.md:8-19, context/AGENTS.md:1-5
Policy Enforcement and Trust Levels
Nexus tracks AI agents and assigns specific "Trust Levels" to govern their capabilities within the environment. This metadata is essential for the OPA engine to make informed authorization decisions.
Agent Identification
Agents are tracked via a centralized document that defines their identity and permission scope.
| Field | Description | Purpose |
|---|---|---|
| Agent ID | Unique identifier for the AI agent | Used as the principal in policy evaluations |
| Description | Functional role of the agent | Provides context for human auditors |
| Trust Level | Security tier (e.g., Low, Medium, High) | Determines the breadth of infrastructure access |
Sources: context/AGENTS.md:7-11
Zero Trust Integration
The Governance layer synthesizes OPA with Zero Trust security. This ensures that:
- Identity is Explicit: No agent is trusted by default based on network location.
- Least Privilege: Agents only receive the minimum permissions necessary for their specific orchestration task.
- Continuous Verification: Every transaction between the agent and the infrastructure is evaluated in real-time.
Sources: README.md:10, README.md:19
Infrastructure Interaction Flow
When an agent attempts to manage environments or SSH connectivity, the Governance layer intercepts the call.
This sequence shows the interaction between the Autonomous Infrastructure Daemon and the OPA engine during an SSH connectivity request.
Sources: README.md:6-10
Summary
OPA Governance is the critical security backbone of the Nexus Orchestrator. By combining the policy-as-code capabilities of Open Policy Agent with a Zero Trust architecture, it enables AI agents to function as autonomous non-human identities without compromising the security of the underlying infrastructure. It ensures that all background orchestration tasks—from environment management to context synthesis—remain compliant with defined organizational policies.
Sources: README.md:5-12