Windows is supported today. macOS and Linux support is pending.
What runs on the workstation
Nexus consists of a desktop application and plugins that integrate with the engineering software installed on the same machine. The application accepts no inbound connections from the network. CAD models, simulation files, and generated code stay on the workstation.Optional connections to a Cosmon backend
By default, the desktop application can run without contacting a Cosmon backend at all. Each connection below is configured independently.Authorization
Nexus is licensed under one of three models.
Machine-locked licensing is used by customers that need the application to run with no contact with Cosmon at any point.
LLM routing
The agent calls a large language model over HTTPS. Routing is configured per deployment.
In BYOK mode the desktop application calls the customer’s chosen endpoint directly. The endpoint does not have to be hosted by Cosmon.
Operational telemetry
When enabled, the desktop application sends operational telemetry to the Cosmon backend. This includes usage counts, error reports, the application version, and OS metadata. It does not include conversation content or engineering data.LLM traces
When enabled, the desktop application sends LLM traces to the Cosmon backend. Traces include prompts, model responses, tool calls, and timing information. Because prompts and tool inputs may contain engineering context — model parameters, code snippets, error messages — this connection sends that content to Cosmon.Backend topology
When backend connections are enabled, the destination depends on what the customer has provisioned.
The set of opt-in connections behaves identically across topologies. Only the destination URL changes.
Configuration spectrum
The four connections above are set independently, so deployments fall on a spectrum. Two endpoints of that spectrum:Fully airgapped
Machine-locked license, BYOK to an internal LLM endpoint, telemetry off, traces off. No outbound connections to Cosmon at any point.
Fully Cosmon-connected
Named (SSO) license, Cosmon-routed LLM, telemetry on, traces on. All connections active, against
api.cosmon.com.