Event Handling
Relevant source files
The following files were used as context for generating this wiki page:
Event handling in the Nexus Orchestrator serves as the "nervous system" for autonomous AI infrastructure management. It facilitates communication between AI agents and their operating environments by processing signals through a structured orchestration layer. This system enables the background execution of tasks, environment management, and security enforcement across diverse infrastructure components.
The event handling mechanism bridges the gap between agentic intent and infrastructure execution by synthesizing the Model Context Protocol (MCP) with LangGraph-powered workflows. This ensures that every action taken by an agent is tracked, governed by Open Policy Agent (OPA) logic, and maintained within a persistent state.
Sources: README.md:3-12, README.md:14-18
Event Architecture and Flow
The architecture is built upon a local-first, background orchestration layer that processes events through four core pillars: connectivity, orchestration, context, and governance.
Connectivity and Protocol
Nexus utilizes an MCP-based protocol to handle communication events between agents and infrastructure. This layer manages SSH connectivity and ensures that agents can interact with remote or local environments seamlessly.
Sources: README.md:5-15
Orchestration Workflow
Workflow management is handled via LangGraph, which allows for complex, stateful event processing. Events trigger specific nodes in a graph, enabling the orchestrator to manage state transitions and autonomous daemon functions.
Sources: README.md:6-16
The following diagram illustrates the high-level flow of an event through the Nexus system:
The diagram shows how an agent-generated event travels through the connectivity protocol into the orchestration workflow, undergoes security validation, executes on infrastructure, and finally updates the persistent context files.
Sources: README.md:14-18, context/AGENTS.md:1-5
Core Components
Identity and Trust Management
Events are associated with specific Agent IDs. The system tracks these identities to apply appropriate trust levels during event processing.
| Component | Description | Reference |
|---|---|---|
| Agent ID | Unique identifier for the AI agent initiating the event. | context/AGENTS.md |
| Trust Level | Security tier assigned to an agent to determine permission scope. | context/AGENTS.md |
| OPA Policy | Rego-based rules used to validate event legality. | README.md |
Sources: context/AGENTS.md:7-11, README.md:18
State Persistence
The Context Layer ensures that event outcomes and agent states are recorded in persistent files. This includes the management of AGENTS.md, which serves as a registry for known agents and their interaction history with the orchestrator.
Sources: README.md:17, context/AGENTS.md:3-5
Security and Governance
Event handling is wrapped in a Zero Trust security model. Before any event results in infrastructure changes (such as environment modification or SSH command execution), it must pass through the Governance Layer.
The sequence diagram details the authorization check performed for every significant event to ensure non-human identities adhere to strict governance rules.
Sources: README.md:8-18
Summary
Event handling in Nexus Orchestrator is a robust, security-first mechanism designed for autonomous infrastructure. By combining LangGraph for workflow logic and OPA for governance, it provides a reliable framework for AI agents to interact with environments while maintaining a persistent record of all activities in the context layer.