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 /exec calls can still 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.