Agent Harnesses

Harness commands choose the default harness for an agent through the public /v1 API. See Harnesses for the concept. OpenClaw and Hermes are the supported harnesses today, and runtime runs can override the default with the harness request field.

Change the default harness

spinup agents harnesses default agent_01hxyz... openclaw

Use --slug when you already have the agent slug:

spinup agents harnesses default support-agent hermes --slug

JSON output

spinup agents harnesses default agent_01hxyz... hermes --json

Default harness changes follow the same reconciliation path as dashboard harness changes. A ready environment may move into a pending reconciliation state while the runtime applies the new default.